Surveys & User Feedback

In-product surveys (NPS, CSAT, custom)

• ★ Formbricks — open source, self-hostable, generous hosted free tier. NPS, CSAT, exit-intent, in-app, link surveys. The default OSS pick.
• ★ PostHog Surveys — bundled with PostHog (already there if you use it for analytics).
• Sprig — paid; in-product surveys + replays + AI insights.
• Survicate, Refiner, Userpilot Surveys — alternative paid platforms.

Standalone forms / surveys

• ★ Tally — Notion-style forms, generous free tier (unlimited responses).
• Typeform — beautiful, paid above small free tier.
• Fillout — Typeform-shaped, generous free tier.
• Forms.app, Jotform — older, feature-rich.
• HelloForms, Formspree — minimal "POST a form to email" services.
• Google Forms — free, basic.

Open source / self-host

• ★ Formbricks — see above.
• OhMyForm — OSS Typeform alternative.
• SurveyJS — OSS form-builder library + paid creator app.
• LimeSurvey — long-running OSS survey platform.

Feedback widgets / changelogs

• ★ Featurebase — feedback boards + roadmap + changelog; generous free tier.
• Canny — feedback boards; free trial, paid above.
• Frill, Productlane, Upvoty, Sleekplan — alternatives.
• GitHub Discussions — free, dev-friendly.

Session replay (often paired with surveys)

• ★ PostHog Session Replay — bundled.
• OpenReplay — open source, self-hostable.
• Highlight — replays + errors + analytics.
• Hotjar — heatmaps + replays + surveys; paid.
• Microsoft Clarity — totally free, no-frills heatmaps + replays + analytics. Underrated.

Embeddable schedulers (combined with research recruitment)

• Cal.com + a Tally form for screening = a free user-research recruitment loop.
• Calendly + Typeform — paid version.
• User Interviews, Wynter, Maze — paid recruitment platforms.

Pick this if…

• Default in-product surveys, free / OSS: Formbricks.
• Already on PostHog: PostHog Surveys.
• Standalone forms, free: Tally or Fillout.
• Feedback boards / changelog: Featurebase or Canny.
• Heatmaps & replays without paying: Microsoft Clarity.