head to head · open source
PostHog vs Umami
PostHog has 39,835 GitHub stars, 3,394 forks, 5,637 open issues and last shipped yesterday. Umami has 38,885 stars, 8,053 forks, 127 open issues and last shipped yesterday. PostHog leads on adoption by 2% (39,835 vs 38,885 stars). PostHog is written in Python under a custom or non-standard licence; Umami is written in TypeScript under MIT. PostHog has attracted 9% as many forks as stars, Umami 21%. 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 | Umami | |
|---|---|---|
| GitHub stars | ★ 40K | ★ 39K |
| License | Custom / other | MIT |
| Written in | Python | TypeScript |
| Last push | 2026-09-17 | 2026-09-17 |
| Forks | ⑂ 3.4K | ⑂ 8.1K |
| 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 Umami if
- You want the Umami feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and Umami 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 Umami
Umami is a privacy first, open source web and product analytics platform that gives site owners and product teams traffic, campaign, behavior, conversion and revenue reporting without cookies or surveillance, run either self hosted or in the cloud.
read the full Umami overview →
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Frequently asked questions
Is PostHog or Umami more popular?
PostHog has 39,835 GitHub stars and Umami has 38,885. PostHog has the larger community by that measure.
Are PostHog and Umami free?
Both are open source. PostHog has no licence declared in this registry, and Umami is licensed under MIT. Both are free to self-host.
What is the difference between PostHog and Umami?
PostHog is written in Python and Umami 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 Umami?
Choose PostHog if you want the larger community (39,835 stars) or its Custom / other licence terms. Choose Umami if its feature set, stack or MIT licence fits better. Both are self-hostable.