SurveyJS
FormbricksSurveyJS vs Formbricks: Best Open-Source Form Builder (2026)
Quick Verdict
Choose SurveyJS if...
Best for development teams building self-hosted, deeply customized form systems into existing JavaScript applications where data control and one-time licensing matter more than out-of-box analytics.
Choose Formbricks if...
Best for product teams who want a self-hosted, privacy-first survey platform for in-app feedback, NPS, and user research — without writing custom code or managing a JavaScript library integration.
SurveyJS and Formbricks are both open-source, self-hostable alternatives to proprietary form and survey platforms. But they solve fundamentally different problems, and choosing between them isn't a matter of which is 'better' — it's about which architecture fits how your team will actually use forms and surveys.
SurveyJS is a JavaScript library suite. You embed it into your existing application. It renders forms from JSON schemas, gives you complete control over styling and behavior, and stores data wherever you want. It's a tool for developers building form capabilities into products.
Formbricks is a standalone survey platform. You deploy it (self-hosted or cloud) and use it through a visual dashboard. It specializes in in-app micro-surveys, website feedback widgets, and link-based surveys with event-driven targeting. It's a tool for product teams collecting user feedback.
This is the key distinction most comparison articles miss: SurveyJS is a library you integrate; Formbricks is a platform you use. A product team at a B2B SaaS company evaluating NPS survey tools and a development team building a multi-step patient intake form into a healthcare app are looking at fundamentally different tools — even though both are 'open-source form builders.'
We compared both tools across customization depth, self-hosting experience, target use cases, pricing models, and the practical trade-offs each architecture imposes. Browse all forms and survey tools for a broader comparison of the category.
Feature Comparison
| Feature | SurveyJS | Formbricks |
|---|---|---|
| Open-Source Form Library | ||
| Drag-and-Drop Survey Creator | ||
| Multi-Framework Support | ||
| Conditional Logic & Branching | ||
| CSS Theme Editor | ||
| Dashboard Analytics | ||
| PDF Generator | ||
| Self-Hosted Data Control | ||
| Multi-Language Localization | ||
| Input Validation & Processing | ||
| In-app, website, link, and | ||
| Event-based survey triggering | ||
| Lightweight 7KB SDK for | ||
| Self-hosted or GDPR-compliant cloud | ||
| Advanced targeting and segmentation | ||
| Real-time analytics and reporting | ||
| No-code survey builder | ||
| Open source (AGPLv3 license) |
Pricing Comparison
| Pricing | SurveyJS | Formbricks |
|---|---|---|
| Free Plan | ||
| Starting Price | 579/developer (one-time) | \u002449/month |
| Total Plans | 4 | 2 |
SurveyJS- Form Library (MIT license)
- 20+ question types
- Input validation
- Conditional logic
- Multi-language support
- Community support
- Survey Creator (drag-and-drop)
- JSON schema generation
- CSS Theme Editor
- Form branching GUI
- 12-month updates & support
- Perpetual license
- Everything in Basic
- Dashboard analytics
- PDF Generator
- Interactive charts & tables
- 12-month updates & support
- Perpetual license
- Everything in PRO
- Priority support
- Technical account manager
- Faster bug fixes
- Best practices sessions
- On-demand releases
Formbricks- 1,000 responses/mo
- Unlimited surveys
- Unlimited team members
- All integrations
- Link & website surveys
- 5,000 responses/mo
- Remove branding
- Advanced targeting
- In-app surveys
- Priority support
Detailed Review
SurveyJS
Open-source JavaScript form builder libraries for React, Angular, Vue, and jQuery
SurveyJS is the right choice when you need to embed sophisticated form capabilities directly into an existing application. As a JavaScript library suite — not a standalone platform — it integrates natively with React, Angular, Vue, and vanilla JavaScript applications. Forms are defined as JSON schemas, rendered client-side, and styled with your application's existing CSS framework. The data goes wherever you send it.
The customization depth is where SurveyJS separates from every other open-source form tool. You get 20+ question types including matrices, dynamic panels, rating scales, and file uploads. Conditional logic, skip patterns, calculated fields, and response carry-forward are all configurable through JSON or the visual Survey Creator. Because SurveyJS is a library, not a platform, there are no limitations imposed by a SaaS dashboard — if your framework supports it, SurveyJS can do it.
The licensing model is unusual but developer-friendly. The core Form Library is MIT-licensed and genuinely free with no response limits or usage restrictions. The visual Survey Creator, Dashboard analytics, and PDF Generator require one-time commercial licenses starting at $579 per developer. This perpetual license model means you pay once and own the capability forever, with optional annual renewals for updates and support. For organizations building form capabilities into commercial products, this is dramatically cheaper than per-response SaaS pricing at scale.
Pros
- Complete embedding into any JavaScript app — React, Angular, Vue, or vanilla JS with native support
- JSON-schema form definitions enable server-driven forms, A/B testing, and dynamic form generation
- One-time perpetual license eliminates recurring SaaS costs — $579 vs ongoing monthly fees
- 20+ question types with conditional logic, branching, and calculated fields
- Full CSS control — forms match your application's design system exactly
Cons
- Requires developer resources to integrate, build a backend, and maintain
- Visual Survey Creator and analytics require paid commercial license for production use
- No built-in analytics dashboard on the free tier — you must build your own reporting
- No user targeting, event triggering, or in-app survey delivery infrastructure
- Documentation gaps for advanced customization scenarios
Formbricks is the right choice when you want a complete, ready-to-use survey platform that you can self-host for full data ownership. Unlike SurveyJS, Formbricks is a standalone application — deploy it with Docker, open the dashboard, and start creating surveys immediately. No development work required to get started.
Formbricks specializes in contextual feedback collection. Its 7KB JavaScript SDK drops into any web application and triggers surveys based on user events, page views, or custom attributes. Want to show an NPS survey after a user completes their 10th session? A feature feedback form when someone uses a new feature for the first time? A churn survey when someone clicks 'Cancel Subscription'? Formbricks handles this targeting natively, with a visual interface for configuring triggers and segments.
The platform covers four survey distribution channels: in-app surveys (embedded via SDK), website surveys (popup widgets), link surveys (shareable URLs), and email-embedded surveys. Real-time analytics show response rates, completion funnels, and aggregate results without exporting data. For product teams that need a Typeform or Hotjar Surveys replacement with self-hosting capabilities, Formbricks is the most complete open-source alternative available.
Pros
- Deploy and start surveying in minutes — standalone platform with visual builder, no coding required
- Event-based in-app survey targeting with user segmentation and behavioral triggers
- Lightweight 7KB SDK doesn't impact page performance when embedded in applications
- Self-hosted version is genuinely free forever — unlimited surveys, seats, and responses
- Four distribution channels (in-app, website, link, email) cover every feedback use case
Cons
- Limited form customization compared to SurveyJS — survey types are predefined, not schema-driven
- AGPLv3 license requires releasing modifications if you distribute the software
- Smaller community and integration ecosystem than established survey platforms
- Self-hosting requires Docker knowledge and ongoing server maintenance
- Advanced targeting and branding removal require paid plans starting at $49/month
Our Conclusion
Choose SurveyJS If...
- You're building forms into an existing application (not alongside it)
- Your team has JavaScript developers who'll maintain the integration
- You need pixel-perfect form styling that matches your app's design system
- Data must stay in your existing database infrastructure
- You want a one-time license cost rather than monthly SaaS fees
- Compliance requirements demand that form data never touches third-party servers
Choose Formbricks If...
- You want to deploy surveys alongside your product without custom development
- Your team is product managers or marketers, not developers
- You need in-app micro-surveys triggered by user behavior (page views, events, segments)
- NPS, CSAT, and feature feedback surveys are your primary use case
- You want a visual builder with no-code workflow and real-time analytics
- You're replacing Hotjar Surveys, Typeform, or SurveyMonkey with a self-hosted alternative
Can You Use Both?
Yes, and some teams do. Use SurveyJS for complex, embedded forms (patient intake, multi-step applications, structured data collection) and Formbricks for lightweight feedback surveys (NPS, feature requests, onboarding feedback). They serve different workflows and don't compete for the same use cases.
For more open-source options, see our developer tools category and explore feedback and survey tools for the full landscape.
Frequently Asked Questions
Is SurveyJS really free?
The core Form Library is free and MIT-licensed with no restrictions. The visual Survey Creator, PDF Generator, and Dashboard components require commercial licenses starting at $579 per developer (one-time). You can render and collect form responses for free; you pay for the visual builder and analytics tools.
Is Formbricks really free?
Self-hosted Formbricks is free forever with unlimited surveys, unlimited seats, and all core features under the AGPLv3 license. The cloud-hosted version has a free tier with 1,000 responses/month. Paid plans start at $49/month for branding removal and advanced targeting. Enterprise starts at $790/month.
Which is easier to self-host?
Formbricks is easier — it's a standalone Docker deployment with a built-in database and dashboard. SurveyJS doesn't need 'hosting' in the traditional sense because it's a client-side library that runs in the browser. But you do need to build your own backend for data storage, which requires more development work.
Can non-developers use SurveyJS?
The Survey Creator (paid add-on) provides a drag-and-drop visual builder that non-developers can use to design forms. However, a developer is still needed to integrate SurveyJS into your application, configure the backend, and maintain the system. Formbricks is fully usable by non-developers from deployment through survey creation.
Which handles in-app surveys better?
Formbricks, by a wide margin. It includes a 7KB JavaScript SDK designed specifically for in-app surveys with event-based triggering, user segmentation, and real-time targeting. SurveyJS can technically render forms inside an app, but it doesn't provide the targeting, triggering, or analytics infrastructure that Formbricks includes.