head to head · open source
PostHog vs InsightFlare
PostHog has 39,909 GitHub stars, 3,411 forks, 5,637 open issues and last shipped yesterday. InsightFlare has 501 stars, 13 forks, 1 open issues and last shipped 2 days ago. PostHog leads on adoption by 7,866% (39,909 vs 501 stars). PostHog is written in Python under a custom or non-standard licence; InsightFlare is written in TypeScript under MIT. PostHog has attracted 9% as many forks as stars, InsightFlare 3%. 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, react), 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 | InsightFlare | |
|---|---|---|
| GitHub stars | ★ 40K | ★ 501 |
| License | Custom / other | MIT |
| Written in | Python | TypeScript |
| Last push | 2026-09-24 | 2026-09-23 |
| Forks | ⑂ 3.4K | ⑂ 13 |
| 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 InsightFlare if
- You want the InsightFlare feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and InsightFlare 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 InsightFlare
InsightFlare is an MIT licensed, privacy friendly web analytics tool written in TypeScript that runs entirely on Cloudflare's edge platform, built for site owners and product teams who want cookieless, GDPR compliant traffic reporting without operating analytics infrastructure of their own.
read the full InsightFlare overview →
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Frequently asked questions
Is PostHog or InsightFlare more popular?
PostHog has 39,909 GitHub stars and InsightFlare has 501. PostHog has the larger community by that measure.
Are PostHog and InsightFlare free?
Both are open source. PostHog has no licence declared in this registry, and InsightFlare is licensed under MIT. Both are free to self-host.
What is the difference between PostHog and InsightFlare?
PostHog is written in Python and InsightFlare 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 InsightFlare?
Choose PostHog if you want the larger community (39,909 stars) or its Custom / other licence terms. Choose InsightFlare if its feature set, stack or MIT licence fits better. Both are self-hostable.