head to head · open source
PostHog vs Rybbit
PostHog has 39,835 GitHub stars, 3,394 forks, 5,637 open issues and last shipped yesterday. Rybbit has 13,018 stars, 743 forks, 198 open issues and last shipped 2 days ago. PostHog leads on adoption by 206% (39,835 vs 13,018 stars). PostHog is written in Python under a custom or non-standard licence; Rybbit is written in TypeScript under AGPL-3.0. PostHog has attracted 9% as many forks as stars, Rybbit 6%. PostHog was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (analytics, product-analytics), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| PostHog | Rybbit | |
|---|---|---|
| GitHub stars | ★ 40K | ★ 13K |
| License | Custom / other | AGPL-3.0 |
| Written in | Python | TypeScript |
| Last push | 2026-09-17 | 2026-09-16 |
| Forks | ⑂ 3.4K | ⑂ 743 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick PostHog if
- You weight community size — 40K stars and counting
- You want the Custom / other license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick Rybbit if
- You want the Rybbit feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches TypeScript
- You evaluated both and Rybbit fits your workflow better
About PostHog
PostHog is an open source platform for building self driving products, combining product analytics, web analytics, session replay, feature flags, experiments, error tracking, logs, surveys, a data warehouse, data pipelines, AI observability, and workflows in a single system, aimed at product, engineering, and growth teams that want to own their product data rather than rent it.
read the full PostHog overview →
About Rybbit
Rybbit is an open source web and product analytics project written in TypeScript and licensed under AGPL 3.0. It lives in the data and analytics ecosystem, specifically web and product analytics, with repository topics including analytics, google analytics, product analytics, and web analytics. The README describes it as a privacy friendly alternative to Google Analytics, with a hosted service and a self hosted path for teams that want audience data without cookies.
read the full Rybbit overview →
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Frequently asked questions
Is PostHog or Rybbit more popular?
PostHog has 39,835 GitHub stars and Rybbit has 13,018. PostHog has the larger community by that measure.
Are PostHog and Rybbit free?
Both are open source. PostHog has no licence declared in this registry, and Rybbit is licensed under AGPL-3.0. Both are free to self-host.
What is the difference between PostHog and Rybbit?
PostHog is written in Python and Rybbit in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, PostHog or Rybbit?
Choose PostHog if you want the larger community (39,835 stars) or its Custom / other licence terms. Choose Rybbit if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.