Unlock the Power of ConvertFlow: Discover Its Game-Changing Features!

ConvertFlow is a unified platform for on-site conversion, enabling marketers to create and manage various interactive elements – from pop-up forms and sticky bars to multi-step funnels – across any website without coding. It is designed to capture leads, engage visitors, and optimize conversion rates through personalized content and A/B testing. In practice, businesses use ConvertFlow to deploy email opt-in forms, exit-intent popups, survey/quiz funnels, announcement bars, and even full landing pages on their sites, all from one interface. Below, we detail ConvertFlow’s key features and capabilities:

Key Features of ConvertFlow

  • Multiple Form Factors (Popups, Bars, Embeds): ConvertFlow supports a wide range of on-site CTAs. Users can create classic modal pop-ups, slide-in boxes, sticky header or footer bars, embedded inline forms, full-screen takeovers, and more. This flexibility allows targeting visitors at different touchpoints – e.g. a sticky bar for a general announcement, a center modal for exit-intent capture, or an embedded form for blog subscribers.

  • Multi-Step Forms, Surveys & Quizzes: ConvertFlow’s form builder enables breaking lengthy forms into multi-step sequences to improve completion rates. You can ask questions one at a time (great for quizzes and surveys) and segment users based on responses. It supports interactive quiz funnels that help segment or recommend products (popular with e-commerce). Post-conversion surveys and polls can gather feedback. The tool also offers a library of pre-designed form and quiz templates for quick launch.

  • Personalization & Behavioral Targeting: A core strength of ConvertFlow is its ability to show personalized content based on visitor data and behavior. It integrates with CRM/marketing platforms to use known contact fields (e.g. name, past purchases) in your messaging. You can set display conditions like “show this popup if returning visitor from X campaign” or “if cart value > $Y” etc. Behavioral triggers (time on page, scroll depth, exit intent) let you target popups at just the right moment. In sum, ConvertFlow acts as a personalization engine on top of your site, tailoring calls-to-action per audience segment.

  • A/B Testing and Optimization: To improve conversion rates, ConvertFlow includes built-in A/B and multivariate testing tools. Users can duplicate a form or page and modify elements to create variants, then split traffic between them. The platform will track performance (views, conversions) for each variant and declare a winner. It supports not only A/B (one factor) but also multi-variate tests (several elements combinations) for more complex optimization. These experiments help refine messaging, design, and offers using data-driven insights.

  • Analytics and Reporting: ConvertFlow provides an analytics dashboard to monitor impressions, conversions, and conversion rates for each campaign. It can integrate with Google Analytics (GA4) by sending custom events, allowing marketers to build custom reports in GA for funnel performance. The platform’s reporting shows aggregate stats and can attribute conversions to specific popups or forms. While comprehensive, some users find ConvertFlow’s native reporting less straightforward than specialized analytics tools, so the GA integration is handy. Overall, you get the data needed to evaluate ROI and optimize campaigns.

  • 1-Click Integrations: ConvertFlow natively integrates with dozens of marketing tools – email service providers (Mailchimp, Klaviyo), CRMs (HubSpot, Salesforce), e-commerce platforms (Shopify), and more. These two-way integrations allow, for example, automatically adding a lead to your CRM list when a form is submitted, or using CRM data to personalize what a returning user sees. There’s also support for Zapier and webhooks to connect with 1000+ apps. This ensures leads captured via ConvertFlow seamlessly flow into your broader marketing stack.

  • Multi-Site Management: ConvertFlow is built to handle campaigns across multiple domains. Marketers (or agencies) can manage multiple websites within one ConvertFlow account – each site installs a script snippet, and you can deploy forms or personalize content on any of those domains from the central dashboard. This multi-site capability is useful for agencies or companies with several brand sites, as it provides “domain-wide” embedding and management from one interface (the Agency Platform). User roles and client-specific workspaces help organize campaigns per site. (Note: documentation highlights the Agency/Enterprise plans support managing many sites with centralized insights.)

  • Ease of Use (Visual Editor & Templates): ConvertFlow offers a drag-and-drop visual editor for designing forms, popups, and pages. Non-technical users can choose from ~300 templates and customize text, images, fields, buttons, etc., or build layouts from scratch. The editor supports custom CSS/JS for advanced tweaks. While powerful, the interface can be complex due to the breadth of features – users report a steeper learning curve for advanced personalization or multi-step flows. Nevertheless, for basic use cases the no-code builder and style options (fonts, colors, etc.) provide a straightforward experience.

In summary, ConvertFlow is a full-funnel conversion toolkit: you can design on-site campaigns (forms, popups, quizzes, landing pages), target them precisely, personalize content per user, test variations, and integrate results with your CRM – all without writing code. This makes it popular for lead generation, e-commerce CRO (e.g. reducing cart abandonment), and general growth marketing on websites. The trade-off for its rich functionality is cost (plans scaling to enterprise pricing) and some complexity for new users.

Generated Keywords for Open-Source Alternatives

Using the above feature breakdown, we brainstormed keywords to find open-source tools with similar capabilities. These keywords span the core functionality, technical aspects, integrations, and deployment models relevant to form & popup management:

  • Core Functionality: lead capture, opt-in forms, landing page forms, website pop-ups, email signup widget, exit-intent popup, sticky bar, multi-step form, quiz builder, survey form, CTA button, conversion widget.

  • Technical & Optimization: A/B testing, split testing, multivariate testing, conversion rate optimization (CRO), segmentation, behavioral targeting, personalization engine, conditional logic, multi-page forms, progressive profiling.

  • Ecosystem & Integration: marketing automation, email marketing, CRM integration, webhook, Zapier integration, analytics tracking, email list building, lead scoring, customer data platform, tag manager.

  • Open Source & Deployment: self-hosted form builder, open-source popup, self-host lead generation, JavaScript form library, embeddable widget, no-code open source, low-code platform, Docker deployment, API based forms.

  • Design & Usability: drag-and-drop editor, WYSIWYG form editor, responsive design, custom CSS, template library, UI builder, visual workflow, themeable forms, white-label forms.

  • Compliance & Privacy: GDPR compliance, data privacy, self-host data, cookie consent popup, user consent forms, open source analytics (no cloud).

These keywords guided our search for open-source alternatives to ConvertFlow – projects that enable building and deploying forms, popups, and personalized offers in a similar way, but as free or self-hosted solutions.

Top 30 Open-Source Alternatives to ConvertFlow

After extensive research (including GitHub repositories, open-source directories, and community forums), we identified 30 of the best open-source projects that offer form building, popup management, and related CRO features. Below we list these alternatives, along with a brief description and how each aligns with ConvertFlow’s capabilities:

1. Budibase – Low-Code Form & App Builder: Budibase is an open-source low-code platform for building business apps, which includes a powerful form builder for creating internal tools and web forms. It features a drag-and-drop UI, built-in form validation, flexible data sources, and automation workflows. While aimed at internal applications, Budibase forms are highly customizable (themes, layouts) and can be made public for lead capture. It’s self-hostable (Docker) and also offers a cloud service. Tech: Node/JavaScript. Notable: Multi-step forms, conditional logic, database integration. (⭐ 15k+ GitHub stars)

2. Mautic – Marketing Automation Suite: Mautic is the world’s largest open-source marketing automation project. It’s a comprehensive tool that includes landing pages and embeddable forms for lead capture, plus email marketing, campaigns, segmentation, and more. Marketers can design forms (with progressive profiling), embed them on any site, and have submissions flow into Mautic’s contact database. It supports form actions (like send email, add to campaign) and A/B testing of emails (though A/B testing forms/landing pages is limited). Mautic shines in multi-channel personalization – you can display dynamic content on your website to known contacts (similar to ConvertFlow’s personalization) and trigger popups via focus items. Tech: PHP (Symfony); MySQL. It’s self-hosted (or available via Acquia’s cloud) and ideal for those needing an all-in-one lead gen + nurture solution. (⭐ 8.4k stars)

3. Erxes – HubSpot/Qualtrics Alternative: Erxes is an open-source experience operating system (XOS) that combines marketing, sales, and customer service tools – positioned as an alternative to HubSpot. For our purposes, Erxes includes a Lead Generation plugin with customizable forms, popups, and embedded placements to capture leads on your website. It has a visual form builder and supports pop-up triggers, plus a messenger widget for live chat. Erxes emphasizes integration: captured leads go into its built-in CRM, and you can then run email sequences or SMS follow-ups. It’s a larger suite (with inbox, deal pipeline, etc.), so setup is heavier. Tech: Node.js, MongoDB, GraphQL. Erxes is self-hostable (Docker) and also offered in cloud; it’s favored by agencies and businesses seeking a unified open-source growth platform. (⭐ 3.7k stars)

4. Formbricks – Open-Source Survey & Form Analytics: Formbricks is a modern open-source alternative to Qualtrics and Typeform, focused on in-app surveys and conversion forms. It provides a no-code form builder for creating “conversion-optimized surveys” (e.g. micro-surveys, NPS prompts, product feedback forms) and can deploy them via shareable links, email, or as embedded widgets on your site. Formbricks’ standout feature is its analytics: it collects detailed response data and offers dashboards for analysis (or you can pipe data to your warehouse). It also supports targeting – you can trigger surveys to specific user segments without coding, much like showing a popup based on user properties. Tech: Next.js (React), TypeScript; uses a Prisma/Postgres backend. Self-host with Docker or use their hosted version (which has a generous free tier). (⭐ 4k stars)

5. OpnForm – No-Code Form Builder (Self-Hosted/Cloud): OpnForm is a popular open-source form builder SaaS that you can also self-host. It provides an intuitive no-code form designer (drag & drop) with many field types, conditional logic, custom branding, and built-in response dashboards. Forms can be embedded anywhere via script or iframe – making it suitable for multi-site usage. OpnForm supports useful extras like email notifications on submission, CAPTCHA spam protection, and integrations via webhooks, Slack, etc. Essentially, it offers the ease-of-use of Typeform/Google Forms but you control the data. Tech: Laravel (PHP) backend + Vue/Nuxt frontend. They offer a cloud service with free unlimited forms (premium plan for advanced features). (⭐ 2.8k stars)

6. OhMyForm – Typeform-Like Form Surveys: OhMyForm is a self-hosted form builder modeled after Typeform’s conversational style. It lets you create beautiful, multi-step forms and surveys with skip logic and then share them via link or embed. Users get a friendly one-question-at-a-time experience. OhMyForm requires a bit of technical setup (it’s distributed via Docker). Once running, you have a web UI to design forms and view submissions. It’s great for mobile-responsive, interactive forms for lead capture or feedback. Tech: Node.js. The project is a community-maintained fork of the earlier TellForm. (⭐ 1.3k stars). Note: Installation is slightly technical (they recommend Docker compose), but it’s fully open-source.

7. Form.io – Form & API Platform: Form.io is an open-source form builder and form backend combined. It provides a drag-and-drop form designer (with all common field types, validations, conditional logic) that outputs a JSON schema. Uniquely, Form.io also generates REST APIs for form submissions out-of-the-box – it’s a form backend as a service. You can embed forms in your site via its JavaScript renderer or use the schema with custom frontends. It’s popular for enterprise forms and workflows. While Form.io (the company) offers a paid SaaS, the core engine is open-source and you can self-host the entire platform. Tech: Node/Express (backend) and Angular/JavaScript (frontend). This is more developer-oriented than ConvertFlow, but very powerful for custom apps.

8. Kinto Formbuilder (Mozilla Kinto): Kinto Formbuilder is an open-source project by Mozilla that provides a React-based form builder on top of Kinto, a JSON document storage service. It allows creating forms via a GUI and storing submissions in the Kinto database. Kinto’s form builder uses the react-jsonschema-form library to generate forms from JSON schema, meaning it’s highly flexible but somewhat technical. It’s self-hostable and was designed to be easy to deploy (Kinto is a Python service that can run with minimal infrastructure). This solution is well-suited if you want a lightweight form/survey tool with a schematized backend. It might require developer input for setup, and the UI is utilitarian. (⭐ 360 stars on GitHub for Kinto Formbuilder repo)

9. Alpaca Forms – JSON-Schema Form Builder: Alpaca is an older but robust open-source form library that provides a web-based form designer and renderer. It’s essentially a JSON schema-driven form generator: you define the form fields/structure (via code or an optional GUI) and Alpaca renders the form in the browser. It supports all standard inputs, validations, and has some basic CSS themes (e.g. Bootstrap). Alpaca is intended for developers who want to embed dynamic forms in their website or app with minimal effort. It does not come with a backend – it’s frontend only – so you’d capture submissions yourself (or pair Alpaca with something like FormTools, Formspree, etc.). Tech: JavaScript (jQuery). It’s fully open-source (Apache 2.0). Good for embedding custom forms if you’re comfortable coding; not a standalone SaaS replacement (no analytics or A/B tests out-of-box).

10. SurveyJS – Embedded Surveys & Forms Library: SurveyJS is a popular MIT-licensed library for building surveys and forms in web apps. It comes with a drag-drop survey creator UI as well as runtime libraries for React, Angular, Vue, or vanilla JS to render the forms. SurveyJS supports complex logic, quiz scoring, multi-page forms, and even pop-up survey modals. Notably, all data stays on your servers – you can hook the form submissions to your own database or via provided integration examples. This is a great open-source alternative if you need fully customizable surveys or lead forms inside your application, with a polished UI. However, it’s a toolkit, not an off-the-shelf service: it requires integration into your codebase. (⭐ 3.6k stars)

11. LimeSurvey – Advanced Survey Platform: LimeSurvey is an open-source package to create and host surveys with advanced logic. It’s more akin to Qualtrics or SurveyMonkey, but you can self-host it. LimeSurvey supports not just simple forms but complex questionnaires with conditional branching, quota management, and multi-lingual support. You can embed surveys into other sites via iframes, or direct users to the survey link. For lead generation, LimeSurvey could be used to create detailed multi-step signup forms or questionnaires, though its interface is a bit dated/heavy for simple popups. It does not have on-site popup triggers out-of-the-box; typically users land on a LimeSurvey page. Best for when you need powerful survey capabilities (e.g. scoring, hidden fields, etc.) under full control. Tech: PHP/MySQL. (⭐ 2k stars)

12. Typebot – Conversational Form & Chatbot Builder: Typebot is an open-source conversational app builder – essentially, it lets you create chat-style forms and embed them on your website. This is ideal for engaging users in a dialog: asking one question at a time in a chat interface (which can improve completion). Typebot can be used for lead qualification, surveys, or onboarding flows. It has a no-code editor with “blocks” to add questions, branching logic, and rich media. The finished chatbot can be embedded via script or launched as a full-page chat. Tech: Originally “fair-source”, it’s now AGPL licensed; built with Node/React. You can self-host (they provide Docker). It’s a powerful alternative to Landbot or Chatfuel, and a creative way to capture leads through interaction.

13. Tripetto – Conversational Form SDK (Open Core): Tripetto offers a unique visual form builder for creating conversational forms, classic forms, or chat-style surveys. The Tripetto core is available as open-source SDKs (the form runner and builder libraries) which developers can embed in their own apps. There’s also a free WordPress plugin that leverages Tripetto. It essentially merges the best of Typeform (conversational interface) and logic like SurveyMonkey, enabling very engaging experiences. Tripetto forms can have advanced branching, calculations, and more. While the full SaaS is not open-source, the core libraries are (Apache 2.0). If you’re a developer looking to integrate a top-notch form designer into your product, Tripetto is a strong option. For non-developers, Tripetto’s WP plugin can be an easy way to use it (if you have a WordPress site).

14. GrowthBook – Feature Flagging and A/B Testing: GrowthBook is an open-source platform focused on experimentation and feature flags, rather than forms per se. However, it’s relevant as a tool for CRO: GrowthBook lets you conduct A/B tests on your website or app by toggling features or content variants for different user segments. For example, you could create two versions of a banner or popup in your code and use GrowthBook to split traffic and measure conversion impact. It has a web UI for defining experiments and integrates with analytics/data for evaluation. While it doesn’t provide a form builder, you could use it in combination with simpler form tools to test different form designs or trigger conditions. Tech: Node/React; uses an SDK approach for flags. They offer a hosted version (with a free tier) in addition to self-host. For teams coming off ConvertFlow mainly for A/B testing needs, GrowthBook provides an open, self-hostable experimentation platform.

15. PostHog – Open-Source Analytics with On-Site Surveys: PostHog is an open-source product analytics platform (an alternative to Mixpanel/Amplitude) that has modules for feature flags, A/B testing, and even in-app surveys. PostHog’s Feature Flags can be used to roll out A/B experiments on your site, and its Surveys feature allows you to show feedback forms or micro-surveys to users in your app or site (triggered by certain actions or events). For instance, you might use PostHog to pop up a one-question survey or net promoter score prompt to a user after they’ve used your service for 5 minutes. While PostHog is broader (tracking user behavior, funnels, session recordings, etc.), its integrated approach to analytics + engagement means you can manage some ConvertFlow-like interactions (simple popups, banners, surveys) and then analyze their effects with full analytics. Tech: Python/React (Django backend). It’s available self-hosted (with all core features free) or hosted (with paid upgrades).

16. Nextcloud Forms – Self-Hosted Form Surveys: Nextcloud Forms is an app in the Nextcloud ecosystem (Nextcloud is an open-source alternative to Google Workspace). It provides functionality similar to Google Forms but on your own server – you can create forms with various question types and collect responses securely. The interface is simple and great for basic surveys, registrations, or contact forms. Forms can be shared via link. However, it does not support embedding on external sites (aside from perhaps an iframe), and lacks advanced targeting or pop-up triggers. Its strength is privacy (all data on your server) and ease if you already use Nextcloud. It’s not as feature-rich as ConvertFlow (no logic branching yet, no A/B tests, etc.), but serves well as a free, open-source Formstack/Google Forms alternative for straightforward use cases. Tech: PHP (integrated in Nextcloud).

17. Baserow – No-Code Database with Forms: Baserow is an open-source Airtable alternative – a no-code database/spreadsheet tool. Within Baserow, you can create a table to collect leads or contacts, and then use its form view feature to generate a web form for that table. The form can be shared or embedded, allowing you to collect submissions that feed directly into your Baserow database (which can then sync to other tools via API or plugins). This is a great approach if you want a quick lead capture form connected to a database – for example, capturing signups to a Baserow table, then manually or automatically exporting to CSV/CRM. Baserow forms support basic customization (field selection, description, cover image) and are mobile-friendly. While they lack advanced logic or styling of ConvertFlow, the advantage is full control of data and the ability to build internal workflows on the collected data. Tech: Django (Python) + Vue.js. Self-host (Docker) or use their hosted version (which has a free tier up to certain rows).

18. Drupal (Webform Module): Drupal, the open-source CMS, has a powerful module called Webform that turns a Drupal site into a form builder on steroids. With Webform, you can construct very complex multi-page forms, with conditional sections, file uploads, and more, all through a UI. These forms can then be published on your site or even embedded elsewhere. Webform will collect results in the Drupal database and can trigger emails or integrate with CRM via add-ons. For organizations already using Drupal, Webform provides an enterprise-grade form and survey capability (used often by governments/universities for complex applications). It’s open-source and free. The downside is you’d need a full Drupal installation – likely overkill if you just need a few popups. But it’s worth mentioning because it offers nearly every feature for forms (logic, multi-step, tokens, etc.) and has a robust community. Tech: PHP/Drupal.

19. Elementor (WordPress) – Popup & Form Builder: Elementor is a popular open-source WordPress page builder plugin. In addition to building pages, it includes a Popup Builder and form widget. With Elementor, a WP site owner can design custom pop-ups or forms visually and define display conditions (e.g. on page X, after 5 seconds, show newsletter popup). It supports templates and advanced styling, and can integrate form submissions with email marketing services through add-ons. Thousands of developers contribute to Elementor’s open-source project, and it’s widely used for conversion optimization on WP sites. If your websites are WordPress-based, using Elementor (or similar plugins) is an open-source solution to achieve ConvertFlow-like popups, sticky bars, and even personalized content. Note: This is constrained to WordPress environments; however, it’s a code-free solution with a lot of power (Elementor’s popup conditions include exit intent, scrolling, etc., similar to ConvertFlow).

20. Popup Maker (WordPress Plugin): Popup Maker is a free open-source WP plugin specifically for creating popups on WordPress sites. It supports a variety of popup types (modal, slide-ins) and triggers (time delay, scroll, click, exit-intent with extension). While not as extensive as ConvertFlow, it lets WordPress users build unlimited popups through a GUI and target them by pages or user status. It’s a solid choice for bloggers or small businesses on WordPress who want to capture emails or show announcements without paying for SaaS. (There are also similar WP plugins like Hustle by WPMU Dev – an open-source marketing plugin for popups and opt-ins.) These plugins inherently are limited to single sites (not multi-domain from one dashboard, unless using WP Multisite). But they represent how one can leverage open-source in the WP ecosystem for CRO.

21. Hustle (WordPress Plugin): Hustle is another popular free plugin (by WPMU Dev) for WordPress that enables creation of popups, slide-ins, top bars, and embedded opt-in forms. It comes with template designs and integrates with many email services. Hustle focuses on email collection popups and social embeds. Since it’s open-source software on WordPress, users have full control and can extend it. It’s comparable to ConvertFlow’s basic functionalities (targeting on specific pages, scheduling popups, etc.) but naturally lacks the centralized multi-site management. For a WordPress-centric shop, Hustle + WP provides a zero-cost alternative to SaaS tools for conversion capture.

22. Apache Unomi – Customer Data & Personalization Engine: Apache Unomi is an open-source Customer Data Platform (CDP) and personalization engine under the Apache Software Foundation. It’s essentially a backend that tracks visitors (profiles) and their events, and can trigger personalized content or experiments via APIs. While Unomi by itself is headless (no UI for forms), it can be used in conjunction with front-end tools to achieve highly personalized experiences – for example, deciding on the server side whether to show a specific popup to a user based on their profile. It was designed to support A/B testing and personalization in web content management systems. This is a developer-focused alternative; one could build a custom ConvertFlow by combining Unomi for decisioning and a JS widget for rendering popups. It’s powerful but requires significant setup and integration. Tech: Java (runs on Karaf). Best for organizations that want an open-source CDP for personalization across channels.

23. Mojito – Open-Source A/B Testing Framework: Mojito is an open-source, self-hosted A/B testing stack for websites. It was created by Mint Metrics and provides a way to define experiments (in code via Git), launch them, and track results. Mojito consists of a JavaScript snippet to deliver variations and a reporting interface. This tool addresses the testing/optimization aspect of ConvertFlow (e.g., trying different popup text or UI). While Mojito won’t build your form for you, it will let you serve two different versions of a banner or form to users and measure which performs better, all on your own infrastructure. It’s highly technical (geared toward developers familiar with version control). Tech: Node and some JavaScript. For an engineering team focused on CRO, Mojito offers an open alternative to Optimizely or ConvertFlow’s built-in A/B test capability, with full control over data and methodology.

24. formsflow.ai – Forms & Workflow Automation: formsflow.ai is an open-source platform that combines a form builder, BPM workflow engine, and analytics. It uses Form.io for form building and Camunda for workflow orchestration. The idea is to let users build functional forms with a drag-drop UI, deploy them, and if needed attach approval workflows or integrations behind the scenes. This is more aligned with internal process automation (like government e-forms, permits, etc.), but it’s open-source and can be repurposed for lead generation or complex multi-step conversion flows. The form builder part is quite powerful (since it inherits Form.io’s features – conditional fields, file uploads, etc.). If your use case requires forms plus automation logic after submission, formsflow.ai might be a fit. It can be self-hosted (Community edition) or you can opt for their managed offering.

25. FormPress – Open Form Builder with Database: FormPress is a newer open-source form builder that emphasizes ease-of-use plus data storage. Unlike many form tools that just give you code, FormPress includes a database and hosting for your forms. You design forms in a no-code editor and FormPress will host the form at a URL and collect submissions for you (with options to embed as well). Essentially, it aims to be an open-source alternative to services like JotForm or Typeform Cloud – you get a link you can share or embed, and a backend that stores results. The creators highlight that having an integrated database and link sharing while being open-source is a key differentiator. It’s a fairly young project (as of 2022) but addresses a common need: quick forms, self-hosted, no coding. Tech: (Likely Laravel or similar stack; the GitLab page can provide details). Good for teams that want a plug-and-play form solution free of vendor lock-in.

26. formBuilder (jQuery) – Drag & Drop Form Generator Library: formBuilder by Kevin Chappell is an MIT-licensed JavaScript library that provides a drag-and-drop form creation interface which outputs HTML forms. It’s often used within other tools (it might actually power some online form sites). If you are coding your own admin panel or site and want users to be able to build forms visually, this library can be embedded. It supports all basic fields, some advanced fields, and generates the form HTML which you can then style or handle as needed. There’s also a formRender component to render the saved form JSON. This is a developer’s component more than an end-user product, but it’s open-source and lightweight. For instance, you could create a mini-ConvertFlow by combining formBuilder (to design the form UI) and your own logic to display that form as a popup on a site. Tech: jQuery. (⭐ 3k stars). Example usage is the site formbuilder.online, which lets you build a form and then copy the HTML code.

27. Framaforms/Yakforms – Open Google Forms Alternative: Framaforms (by Framasoft) or its codebase Yakforms is an open-source web app that lets anyone create forms and collect responses (it’s built on Drupal + Webform). Essentially, Framasoft set it up to provide a free forms service to the community (as an open-source, privacy-friendly Google Forms alternative). The software itself (Yakforms) can be self-hosted if you want your own “forms portal.” It supports typical form fields, the ability to make forms public or private, and CSV export of results. While it doesn’t offer popups on existing sites, it’s a good solution for quickly generating standalone forms for lead capture. For example, an agency could host Yakforms and use it to make forms for multiple clients and send them embed links. It inherits Drupal Webform’s power, so it’s quite flexible in logic. The UI is not extremely modern, but it’s functional and open-source.

28. FormTools – Form Submission Backend: FormTools is a PHP/MySQL open-source software that does not create forms for you, but rather accepts and stores submissions from any forms you have. You can think of it as an open-source form backend or database. You design your HTML form (or use another builder) and point the form’s action to FormTools – it will record the submission, email you if configured, and provide a UI to manage submissions. This is useful if you want to roll out custom-designed forms on multiple sites and have all the data funnel to one central, self-hosted repository. FormTools provides an admin panel to view and export submissions, define fields, etc. It’s a bit of a different angle: whereas ConvertFlow provides both the frontend and backend, with FormTools you handle the frontend (form UI through code or another builder) and let FormTools handle storage and admin. It’s quite handy for simple lead capture without relying on third-party servers.

29. SuiteCRM / vTiger – CRM Lead Forms: For those using open-source CRM systems like SuiteCRM or vTiger, these platforms often include Web-to-Lead form builders. For instance, SuiteCRM (a SugarCRM fork) lets you generate an HTML form that, when published on your site, will create a lead in the CRM upon submission. While not as flexible as ConvertFlow’s designer, these can be styled and put in modals manually. They won’t handle pop-up triggers (you’d need custom JS or CMS features for that), but they ensure leads go straight into your open-source CRM. If your main goal is lead capture into a CRM, leveraging the CRM’s native form capabilities is an open-source route. However, you’ll lack the refined control (timing, multi-step, A/B testing) that dedicated form tools offer. This approach is mentioned for completeness – it’s an open-source solution but requires more manual work to emulate ConvertFlow’s behavioral targeting.

30. Matomo Analytics (with Tag Manager): Matomo (formerly Piwik) is an open-source web analytics platform (an alternative to Google Analytics). By itself, Matomo doesn’t create forms or popups. However, the Matomo Tag Manager can inject custom HTML/JS onto your site based on triggers (page views, etc.). In theory, one could use Matomo Tag Manager to trigger a pop-up form (by injecting form HTML or a script) on certain conditions, and then track the conversions in Matomo. This is a rather technical and creative use case, but it underscores that with open-source tools you can patch together solutions: Matomo for detecting behavior + a custom form snippet for the popup. Additionally, Matomo’s goal tracking and conversion funnels can be used to analyze the effectiveness of any forms you deploy. So while Matomo is not a form builder, it is an open-source analytics companion that can complement the above tools (many of which lack deep analytics). For a pure open CRO stack: you might use Matomo for analytics, an open form tool for capture, and perhaps Unomi or GrowthBook for personalization/experimentation.

The above alternatives cover a broad spectrum – from simple no-code form builders to full marketing automation suites and developer libraries. Each addresses different aspects of ConvertFlow’s functionality: Some focus on form design and embedding, others on targeting and personalization, others on analytics and testing. The choice depends on your specific needs (e.g. needing a friendly UI vs. needing hardcore customization). Importantly, all are open-source or source-available, meaning you can self-host and avoid recurring SaaS fees.

Comparative Analysis of Top Alternatives

Now we compare some of the top open-source alternatives in terms of technology, deployment, features, usability, and community support. We’ll highlight how they stack up against ConvertFlow and each other:

  • Technology Stack & Self-Hosting: The tools vary widely in stack. For example, Mautic and FormPress are PHP-based (runnable on a LAMP server), whereas Budibase, Formbricks, and PostHog are Node/JavaScript-based (often deployed via Docker). Erxes has a more complex stack (Node + Mongo + Redis + RabbitMQ, etc.), meaning more moving parts to self-host. Simpler form-focused tools (OpnForm, OhMyForm) usually provide Docker images for one-command deployment. Ensure your team’s comfort with the stack – e.g., a PHP shop might favor Mautic or Drupal, while a Node/React team might lean towards Formbricks or custom SurveyJS integrations. All these being open-source means you can host on your own server or cloud of choice. Scalability will depend on the stack: tools like Mautic or Erxes (which manage heavy data) require more resources at scale, whereas lightweight form libraries (SurveyJS, formBuilder) run within your existing site front-end.

  • Ease of Deployment: Many projects provide Docker containers or one-line install scripts (Budibase, Formbricks, OpnForm all have Docker deploy guides). Others, like Mautic, can be installed via a PHP web installer or packages. Erxes and Unomi are heavier to set up – expect to configure multiple services. If you prefer hassle-free, look at those with community Docker images or cloud options. On the flip side, if you want tight integration (e.g. integrating directly into your web app), libraries like SurveyJS or Alpaca might be “deployed” simply by npm installing them into your project. It’s a trade-off between out-of-the-box functionality versus custom integration effort.

  • Feature Parity with ConvertFlow: No single open-source tool covers all of ConvertFlow’s features; you may need a combination:

    • Form & Popup Design: For a no-code experience, consider OpnForm, FormPress, Budibase, or WordPress+Elementor/PopupMaker – these offer visual form/popup building akin to ConvertFlow’s editor. If you’re okay with code, SurveyJS or formBuilder can be molded to your needs with more flexibility.

    • Multi-Step and Logic: Most listed form builders support multi-step forms (Budibase, Form.io, OhMyForm, etc. all do). Conditional logic is present in Mautic forms, Form.io, Budibase, Kinto, etc. – so you can show fields or steps based on previous answers, similar to ConvertFlow’s conditional funnels.

    • Pop-up Triggers/Targeting: This is where you might need to combine tools. Few open-source projects have a built-in notion of “show this form as a popup on exit intent or on page X”. Exceptions: WordPress plugins (Elementor, Popup Maker, Hustle) have such triggers in their UI, and Matomo Tag Manager or custom JS can be used for triggering. For others, you’d manually embed their form code into your site and use custom scripting to display it on conditions (or use a container like Google Tag Manager/Matomo).

    • Personalization: Tools like Erxes and Mautic excel here – they store contact profiles and can personalize web content or emails using that data. For instance, Mautic’s tracking script can replace content on your site for known users (e.g. “Welcome back, Alice!”) and do simple popups based on segments. This is comparable to ConvertFlow’s personalization features. If personalization is key and you want open-source, a marketing automation suite (Mautic/Erxes) or a CDP (Unomi) should be in your stack.

    • A/B Testing & Experimentation: GrowthBook and Mojito are purpose-built for this – they can be integrated to test different on-site experiences. Without those, you can still do basic A/B in some tools: ConvertFlow’s alternatives like Erxes or Mautic don’t have built-in visual A/B for forms, but you could duplicate a form and alternate them manually or via scripts. For a more automated approach, an experimentation framework (GrowthBook, PostHog’s feature flags, or Wasabi) is suggested.

    • Integrations: Open-source tools vary from none to many. Mautic and Erxes have numerous integrations (CRM, email, social) out of the box to sync leads. Simpler tools might just offer webhooks or Zapier. If you need to pipe data to other systems, ensure the alternative supports it – e.g. OpnForm supports Slack and webhook integrations, Formbricks offers Slack, Notion, Zapier, etc., Budibase can connect to databases/APIs, etc. In open-source, even if not built-in, you can often script integrations thanks to open APIs or direct database access, but it requires effort.

  • Usability (UI/UX and Learning Curve): ConvertFlow is aimed at marketers; likewise, OpnForm, FormPress, Budibase have relatively friendly UIs that non-developers can navigate. Mautic and Erxes are more complex systems – a marketer can use them, but there’s more to configure (campaigns, cron jobs for Mautic, etc.). WordPress solutions are generally easy for those already familiar with WP (the UI integrates with WP admin). Developer-centric tools (Kinto, SurveyJS, GrowthBook) will not be very usable for non-devs – they shine when integrated by a developer into a larger app. If you have a mixed team, one approach is to use something like Formbricks or Budibase (easy UI for marketers to create forms) and have developers handle integration and any advanced targeting logic on the website. Also, consider the quality of documentation: projects like Mautic and Budibase have extensive docs and even community forums, whereas smaller libraries might have minimal docs but active GitHub issue support.

  • Community & Maintenance: An important factor in open-source is the health of the project. Mautic has a large community and is now backed by Acquia, so it gets regular updates (major versions, security fixes). Budibase as an open-core company-backed project is very active in development (lots of stars and contributors). Formbricks and OpnForm are relatively new but show frequent commits and community engagement (e.g., OpnForm’s Discord, Formbricks sharing milestone of 4k stars, etc.). Some older projects like Alpaca or FormTools might be in maintenance mode (fewer updates but they do what they advertise). Check the repository activity: e.g., GrowthBook and PostHog are extremely active, ensuring cutting-edge features; OhMyForm has a community maintaining it after the fork. Community support is crucial for troubleshooting – popular projects have forums or chat (Mautic forums, Erxes Discord, Budibase Discord, etc.), which can be as helpful as ConvertFlow’s support, albeit community-driven. Before adopting, evaluate if the project has recent commits and a responsive support channel.

  • Multi-Site Management: ConvertFlow’s selling point for agencies is one dashboard for many sites. How do alternatives fare for this use-case?

    • Suites like Mautic or Erxes can handle multiple domains’ tracking and forms (you’d use one instance to serve forms on many sites, segmenting by campaign or URL). They may not have a neat “client-by-client” separation in UI out-of-the-box (Erxes does allow multiple brands via its plugin architecture; Mautic can manage multiple landing pages/forms and you can tag them by site).

    • Budibase could build forms for multiple projects, but currently each Budibase app might be a separate endpoint – you might spin up one app per client.

    • OpnForm/FormPress: These are naturally multi-tenant (especially OpnForm Cloud) – you can create unlimited forms for different sites and just embed them where needed. They don’t “care” which domain a form is on (except maybe for cross-domain script permissions, which are usually fine). So you’d treat it as your centralized form service.

    • WordPress plugins are inherently per-site (unless you run a WordPress Multisite for clients, which is an option – e.g., one WP network with Hustle can host popups for multiple sub-sites).

    • Form.io can serve as a centralized form API for any number of sites (the forms are accessed via API or embedded widget).

    In summary, open-source alternatives can support multi-site deployments, but you might have to architect it. With self-hosted, you control the limits: you can use one instance to power dozens of sites – it’s mostly about organizing your forms and data in that system. Agency-oriented features (client user roles, usage analytics per site) would need custom handling or choosing a tool that supports it (Erxes, for instance, is multi-tenant by design with its plugin marketplace approach, suitable for agencies).

  • Security & Compliance: Since many open-source tools are self-hosted, you have full control over data location – which is a big plus for GDPR compliance and privacy. For example, companies in regulated industries might choose Mautic or Formbricks specifically to keep lead data in-house. However, responsibility for compliance also falls on you – ensure the tool provides necessary features like double opt-in or cookie consent if applicable. Some tools (Mautic, Matomo) explicitly market themselves as privacy-friendly alternatives to big SaaS. When self-hosting, also consider security practices: open-source communities release patches (e.g., Mautic security updates) that you’ll need to apply. Unlike a SaaS where the provider handles it, you are in charge of updates.

To illustrate the comparison, let’s briefly compare a few head-to-head on certain criteria:

  • Budibase vs ConvertFlow: Budibase is more of an internal app builder, but it scores high on form design flexibility and data handling. It lacks native popup trigger functionality – you’d embed a Budibase form in a site manually. However, Budibase could be overkill if you just need marketing popups. It shines if you want to build both the form and a custom backend app around it. ConvertFlow is laser-focused on marketing use cases (with templates, targeting rules, etc.), which Budibase would require manual setup to replicate.

  • Mautic vs ConvertFlow: Mautic provides a broader marketing automation scope – beyond on-site conversion, it handles email campaigns, drip nurturing, lead scoring, etc. It does provide on-site tools like popups (called Campaign Forms or Focus Items in older versions) and dynamic content, but these require more configuration and aren’t as visually oriented as ConvertFlow’s builder. If your goal is multi-step funnels that continue post sign-up (emails, CRM), Mautic is a powerful open alternative. But for pure on-site A/B tested popups with a drag-drop editor, ConvertFlow is more specialized and user-friendly.

  • Erxes vs ConvertFlow: Erxes covers many ConvertFlow features (popups, forms) and adds a full CRM/helpdesk suite. It’s great if you want an all-in-one growth platform and have the resources to host and maintain it. It even has a built-in messenger and knowledge base. The downside is complexity – ConvertFlow is something a single marketer can operate in a few days; Erxes might require a small team to implement across all features. Erxes would let you manage multiple websites’ campaigns within one instance, similar to ConvertFlow’s multi-site, since it’s built for agencies (even their marketing site touts using it for “all types of businesses”). It’s a heavyweight but very capable if utilized fully.

  • Formbricks vs ConvertFlow: Formbricks is narrower in focus: primarily surveys and feedback forms, versus ConvertFlow’s broader “funnels” (landing pages, product recommendations, etc.). However, for collecting user insights or micro-conversions (like gathering feedback, testimonials, etc.), Formbricks provides an open-source solution with a slick UI and strong privacy stance. It doesn’t directly do pop-up marketing offers (e.g. “10% off if you sign up”) out of the box, but one could certainly use it to create a pop-up survey that doubles as a lead form. If you pair Formbricks with a simple targeting mechanism (like a snippet to trigger it after X seconds), it could replace certain ConvertFlow popups – with the bonus of built-in analysis of responses.

Overall, the open-source landscape offers modular alternatives: you might use one tool for form creation, another for serving it conditionally, and another for analysis, achieving a similar outcome to an integrated platform like ConvertFlow. The benefit is flexibility and cost savings (and ownership of data); the drawback is the assembly and maintenance required.

Hosted Versions and Pricing Considerations

Many of these open-source solutions are available in hosted/SaaS form as well, which can be attractive if you want ease-of-use but with an open-core philosophy (often allowing migration to self-host later). Here we explore hosted options and how they compare in terms of features, pricing, and multi-site support:

  • OpnForm Cloud: OpnForm offers a managed cloud service. Notably, it has an unlimited free plan for core features – unlimited forms, submissions, etc., making it very generous. The paid OpnForm Pro (around $16/month) adds advanced features like custom domains, white-labeling, perhaps more integrations or an AI form builder. This hosted option might be ideal for startups and agencies: you get the benefits of open-source (no vendor lock-in, you can self-host if needed) with the convenience of not managing the server. And you can use it across multiple websites freely (no domain limit mentioned on free plan). Essentially, OpnForm Cloud positions itself as a cheaper or free alternative to Typeform/ConvertFlow for form building, with the ability to upgrade for power features.

  • Formbricks Cloud: Formbricks runs a cloud service (with a free tier likely) for its experience management suite. Typically, they allow a certain number of responses or active surveys free, and then paid plans for higher usage or team collaboration. Hosted Formbricks includes all the open-source survey features plus maybe priority support. Since Formbricks is AGPL, even the hosted version will keep core features free in the community edition. For multi-site, Formbricks cloud doesn’t specifically limit domains – you can deploy surveys in-app or on any site by injecting their snippet. Pricing scales by usage (number of survey responses or tracked users).

  • Budibase Cloud: Budibase has a cloud platform where you can build and host apps/forms without deploying yourself. They have free tier (for a limited number of applications or users) and paid tiers for more. Budibase cloud simplifies deployment (no Docker needed on your end). For multiple websites, you’d likely create separate apps or forms for each project within your account. Budibase’s pricing (at time of writing) starts free for hobby and then per-user or per-app pricing for business. If you only need one form app to serve many sites, you could still do that on one account (the form could be embedded anywhere). Consider Budibase cloud as a low-code form builder SaaS but you have the safety that you could self-host if their pricing or service ever becomes an issue.

  • Mautic (Acquia Campaign Factory): Mautic is offered as a hosted service by Acquia (formerly Mautic Inc.). The hosted version (often called Mautic Cloud or Campaign Studio) is typically a paid enterprise service – pricing is not public (enterprise tier, custom quotes). It’s geared towards larger organizations that want the power of Mautic without running servers, and it often includes support and SLAs. They do have a concept of multi-tenant “Campaign Factory” for agencies, where one parent account can spawn multiple child Mautic accounts for different brands – excellent for multi-site management but again an enterprise offering. For most users, self-hosting Mautic is the cost-effective route (free), using community support.

  • Erxes Cloud: Erxes Inc. provides hosted plans for their XOS. They likely have a free tier for small usage and then per-user or per-contact pricing for advanced features (since Erxes replaces CRM and support tools, pricing might be structured by seats). Using Erxes Cloud saves you from managing its complex stack. They emphasize being a cost-effective alternative to HubSpot – indeed, Erxes paid plans will generally undercut HubSpot significantly. For multi-site, one Erxes workspace can handle multiple brand inboxes, forms, etc., so you wouldn’t pay per site, but rather for overall usage (contacts or team members).

  • GrowthBook Cloud: GrowthBook has a free SaaS version (for small teams or limited feature flags) and a Pro ($20/user/mo as per CXL article). The free tier often allows unlimited experiments but limited members or data retention. If you don’t want to host your own experimentation infrastructure, their cloud is an easy way to start running A/B tests. It supports multiple projects (you can manage experiments for multiple websites or products under one account). If you are an agency offering CRO experimentation, GrowthBook Cloud could be a helpful central platform at relatively low cost compared to Optimizely.

  • PostHog Cloud (PostHog.com): PostHog offers a free hosted plan for up to 1 million events per month, which is usually sufficient for modest traffic, and then paid plans for higher volumes. The free plan includes feature flags and surveys, so you can use it to deploy on-site surveys or flags on multiple sites (by creating multiple “projects” in one account). They also have a concept of organizations and teams to separate data. The cloud convenience vs. self-host trade-off depends on your data sensitivity; some opt to self-host PostHog for full control (and avoid event limits). Multi-site wise, you can track and manage each site either in one project (with filtering) or separate projects – flexible setup.

  • Matomo Cloud: Matomo (which we included as an analytics companion) has a paid cloud service if you don’t want to self-host analytics. It’s priced by number of tracked pageviews. While Matomo does not directly provide form building, it’s worth noting for analytics budget – it’s generally cheaper than Google Analytics 360 or Adobe, but since we’re focusing on forms/popup, Matomo cloud would only come into play for analysis of conversion goals from your forms.

  • formsflow.ai Cloud: The AOT Technologies team behind formsflow.ai likely offers support contracts or hosting. They have a Community (open) vs Enterprise model. Enterprise (paid) might include extra features like an AI assistant in form builder, priority support, etc. But you can use the Community edition for free and host yourself. Their site suggests they have options to host with premium support – pricing would be custom since it targets government/enterprise use cases mostly.

  • Others: Many smaller projects don’t have official hosted versions (e.g., SurveyJS is just a library; Alpaca no). But interestingly, some third parties or contributors sometimes create SaaS around open-source projects. For example, there might be a hosted Kinto service (or one could use Mozilla’s services when it was active). Also, some projects like FlagSmith (open-source feature flag) or Bullet Train (now "Flagsmith") do open-source + hosted model, though we did not list Flagsmith above specifically. If experimentation is a need, Flagsmith could be another alternative (open-source, with hosted multi-tenant plans, used for feature flags and simple personalization).

  • Cost Comparison: In general, using these open-source solutions can significantly reduce costs compared to ConvertFlow’s plans (which start at ~$49/month and go up based on views or sites). If self-hosted, your cost is essentially server time + maintenance. Hosted open-source services often have freemium models where you pay only when usage grows or for premium support. For instance:

    • OpnForm: free unlimited core usage, $16/mo for pro – dramatically cheaper than ConvertFlow for similar scale of forms.

    • Budibase: free for small, then maybe $10-$25/mo for advanced (and you could host unlimited on your own for free).

    • Erxes: they pride on being more affordable than HubSpot – expect to save a lot if you switch, though you’ll invest in setup.

    • Mautic: free self-host; if you require pro support, some providers offer managed Mautic for a fraction of other marketing clouds.

    • GrowthBook/PostHog: free tiers cover a lot; beyond that, costs are usually in the low hundreds per month at most for mid-sized usage, which is often still less than high-end testing suites.

  • Scalability & Multi-site on Hosted Plans: If you plan to manage multiple websites, check the hosted plan terms: some SaaS might limit number of projects or domains on a given plan. For example, a free GrowthBook account might allow unlimited projects (not certain), while an OpnForm free account seems to allow unlimited forms and presumably you can embed those on any number of domains without extra charge. This is an advantage over many conversion SaaS (which often price per site or domain). The open-source philosophy tends to not nickel-and-dime by domain; pricing is more often based on usage (views, submissions) or user seats. So, an agency could use one account to serve many client sites as long as volume stays within limits. If volume grows, you can either scale up the plan or deploy self-hosted to essentially get “unlimited” usage for free (just higher server costs).

  • Ease of Use in Hosted Form: Hosted versions often add convenience features. For instance:

    • OpnForm Cloud handles all updates and provides a UI at your fingertips – no need to worry about Docker or security patches.

    • Formbricks Cloud likely provides a smooth onboarding, maybe templates for common surveys.

    • Hosted Erxes may have a support team to help configure popups and workflows (like HubSpot onboarding but at lower cost).

    • These can mitigate the learning curve – you get the same UI but without the DevOps overhead. If later you need a custom feature, you could export data and switch to self-hosting (with open data formats).

In conclusion, hosted open-source options give you flexibility: you can start quickly in the cloud and, if needed, migrate on-premise later (avoiding lock-in). They often provide unlimited or very generous usage compared to proprietary SaaS, especially for managing multiple websites. When evaluating open-source vs proprietary, consider a hybrid approach: maybe use a hosted open-source service for speed, while contributing to or customizing the project in parallel. The cost savings can be significant, and you’ll have the peace of mind that you’re not entirely dependent on a single vendor – you always have the self-host alternative in your back pocket.


Sources:

  • ConvertFlow key features and personalization, A/B testing, integrations, and ease-of-use feedback.

  • Budibase open-source form builder overview (Joe Johnston, Top 6 Open Source Form Builders in 2025).

  • Mautic project description (Mautic GitHub README).

  • Erxes lead generation and forms capability (Erxes GitHub README).

  • Formbricks features (Formbricks GitHub README).

  • OpnForm key features (OpnForm GitHub README).

  • OhMyForm installation note (FormPress blog).

  • Form.io open source form platform.

  • Kinto Formbuilder flexibility vs difficulty (Budibase blog).

  • Alpaca form builder for developers (FormPress blog).

  • SurveyJS library description (SurveyJS GitHub README).

  • LimeSurvey open-source survey description (Weavely blog).

  • Typebot open-source conversational forms (Reddit/webdev mention).

  • Tripetto positioning (Tripetto blog).

  • GrowthBook open-source A/B platform (CXL article).

  • PostHog open-source tool note (WiserNotify blog).

  • OpnForm pricing model (OpnForm website).

  • Hustle WP plugin open-source note (WP.org plugin page).

  • Apache Unomi purpose (Apache Unomi GitHub).

  • Mojito open-source A/B testing intro (Mint Metrics/PostHog blog).

  • formsflow.ai overview (formsflow.ai site).

  • FormPress vs others (database integration) (FormPress blog).

  • formBuilder.online example (embed code use) (FormPress blog).

  • Elementor open-source mention (extensible, for leads) (SourceForge).

  • HelloBar vs ConvertFlow comparison (for context on features).

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