head to head · open source
PostHog vs tianji
PostHog has 40,600 GitHub stars, 3,579 forks, 5,637 open issues and last shipped yesterday. tianji has 3,120 stars, 199 forks, 139 open issues and last shipped 4 days ago. PostHog leads on adoption by 1,201% (40,600 vs 3,120 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 | ★ 41K | ★ 3.1K |
| License | Custom / other | Apache-2.0 |
| Written in | Python | TypeScript |
| Last push | 2026-11-02 | 2026-10-30 |
| Forks | ⑂ 3.6K | ⑂ 199 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick PostHog if
- You weight community size — 41K 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
Docs Community Roadmap Why PostHog? Changelog Bug reports PostHog is the open source platform for building self driving products PostHog provides every tool you need to build a successful product, and captures all the context agents need to proactively diagnose problems, uncover opportunities, and ship fixes: Self driving mode: Turn signals in your product data (errors, rage clicks, failed queries, and more) into researched reports and pull requests you review and merge. Product analytics: Autocapture or manually instrument event based analytics to understand user behavior and analyze data with visualization or…
read the full PostHog overview →
About tianji
Tianji All in One Insight Hub Website analytics + Uptime Monitor + Server Status = Tianji All in one project! Motivation During our observations of the website. We often need to use multiple applications together. For example, we need analysis tools such as GA / umami to check pv/uv and the number of visits to each page, we need an uptime monitor to check the network quality and connectivity of the server, and we need to use prometheus to obtain the status reported by the server to check the quality of the server. In addition, if we develop an application that allows open source deployment, we often need a…
read the full tianji overview →
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Frequently asked questions
Is PostHog or tianji more popular?
PostHog has 40,600 GitHub stars and tianji has 3,120. 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 (40,600 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.