free open source survey software

If you want total control over your data, no arbitrary response caps, and the freedom to self-host, open-source survey tools are the way to go.

The top free, open-source survey software platforms are organized below by their best use cases:

• The Heavy Hitter: LimeSurvey

Best for advanced research, academic studies, and complex logic. LimeSurvey is the most mature and feature-rich open-source survey tool available.

• Key Features: Supports conditional branching (skip logic), over 80 languages, and massive multi-page questionnaires.

• Data Control: Completely GDPR-compliant. You can host it entirely on your own servers for free, giving you 100% data ownership.

• The Catch: The interface feels a bit dated and has a steeper learning curve compared to modern apps.

• The Modern Challenger: Formbricks

Best for startups, product teams, and customer experience (CX) tracking. Formbricks is a privacy-first, highly polished alternative to commercial tools like Typeform or SurveyMonkey.

• Key Features: Allows you to run email, link, and targeted in-app or on-site pop-up surveys based on user behavior. It features a beautiful, clean UI.

• Integrations: Easily connects with modern stacks like Slack, HubSpot, or custom webhooks.

• The Catch: It is a newer project, so while it evolves incredibly fast, it focuses heavily on digital products rather than traditional long-form academic research.

• The Developer's Toolkit: SurveyJS

Best for developers wanting to embed a survey builder into their own apps. SurveyJS isn't a standalone software, but rather a collection of open-source JavaScript libraries.

• Key Features: Fully customizable visual editor, data analytics dashboard, and direct PDF rendering.

• Licensing: The core libraries are MIT-licensed (completely free), though they offer premium developer licenses for advanced commercial use.

• The Interactive Specialist: Typebot

Best for conversational, chat-style surveys. If traditional forms bore your audience, Typebot builds interactive, chat-like flows.

• Key Features: Drag-and-drop visual editor to build survey bots. It drastically improves completion rates for lead generation and quick feedback.

• The Catch: Highly specialized. If you need standard grid matrices or complex academic question types, this won’t work.

• The Internal Collaborator: Nextcloud Forms

Best for organizations already using self-hosted cloud environments. If your team uses Nextcloud for file sharing, this is a built-in app.

• Key Features: Simple, straightforward, and zero-fuss. It behaves exactly like Google Forms but ensures no data ever leaves your private server.

Which of these sounds closest to what you need—are you looking for a powerful academic tool like LimeSurvey, or a sleek product-feedback tool like Formbricks?