Formbricks

formbricks.com

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Open-source survey and experience-management platform — build in-product surveys and forms without Typeform's per-response pricing.

Why it is useful

Formbricks is built specifically for in-app and website surveys (NPS, PMF, churn feedback) with targeting logic, not just generic forms, and it's self-hostable to keep respondent data private. The free self-hosted tier removes the response caps that make paid form tools expensive at scale.