head to head · open source
PostHog vs offen
PostHog has 39,835 GitHub stars, 3,394 forks, 5,637 open issues and last shipped yesterday. offen has 981 stars, 54 forks, 18 open issues and last shipped 7 months ago. PostHog leads on adoption by 3,961% (39,835 vs 981 stars). PostHog is written in Python under a custom or non-standard licence; offen is written in JavaScript under Apache-2.0. PostHog has attracted 9% as many forks as stars, offen 6%. PostHog was the more recently maintained of the two, and both are self-hostable with no licence fee.
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 | offen | |
|---|---|---|
| GitHub stars | ★ 40K | ★ 981 |
| License | Custom / other | Apache-2.0 |
| Written in | Python | JavaScript |
| Last push | 2026-09-17 | 2026-03-04 |
| Forks | ⑂ 3.4K | ⑂ 54 |
| 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 offen if
- You want the offen feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches JavaScript
- You evaluated both and offen 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 offen
Offen Fair Web Analytics is a free, open source, self hosted web analytics application for website operators and teams who want privacy compliant usage statistics with end to end encrypted data, and for the visitors who can review or delete their own data.
read the full offen overview →
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Frequently asked questions
Is PostHog or offen more popular?
PostHog has 39,835 GitHub stars and offen has 981. PostHog has the larger community by that measure.
Are PostHog and offen free?
Both are open source. PostHog has no licence declared in this registry, and offen is licensed under Apache-2.0. Both are free to self-host.
What is the difference between PostHog and offen?
PostHog is written in Python and offen in JavaScript. 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 offen?
Choose PostHog if you want the larger community (39,835 stars) or its Custom / other licence terms. Choose offen if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.