head to head · open source
PostHog vs tianji
PostHog has 39,835 GitHub stars, 3,394 forks, 5,637 open issues and last shipped yesterday. tianji has 3,098 stars, 194 forks, 139 open issues and last shipped yesterday. PostHog leads on adoption by 1,186% (39,835 vs 3,098 stars). PostHog is written in Python under a custom or non-standard licence; tianji is written in TypeScript under Apache-2.0. PostHog has attracted 9% as many forks as stars, tianji 6%. PostHog was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (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 | tianji | |
|---|---|---|
| GitHub stars | ★ 40K | ★ 3.1K |
| License | Custom / other | Apache-2.0 |
| Written in | Python | TypeScript |
| Last push | 2026-09-17 | 2026-09-17 |
| Forks | ⑂ 3.4K | ⑂ 194 |
| 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 tianji if
- You want the tianji feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches TypeScript
- You evaluated both and tianji 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 tianji
Tianji is a self hosted TypeScript project that combines website analytics, uptime monitoring, and server status in one application under the Apache 2.0 license. It is positioned as an all in one insight hub rather than only another Google Analytics alternative, and it lives in the web and product analytics ecosystem alongside tools such as Umami, Google Analytics, uptime monitors, and server status collectors.
read the full tianji overview →
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Frequently asked questions
Is PostHog or tianji more popular?
PostHog has 39,835 GitHub stars and tianji has 3,098. PostHog has the larger community by that measure.
Are PostHog and tianji free?
Both are open source. PostHog has no licence declared in this registry, and tianji is licensed under Apache-2.0. Both are free to self-host.
What is the difference between PostHog and tianji?
PostHog is written in Python and tianji 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 tianji?
Choose PostHog if you want the larger community (39,835 stars) or its Custom / other licence terms. Choose tianji if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.