Jitsu vs PostHog
Both are alternatives to Segment. Here's how they stack up — verified facts, no spin.
Also searched as PostHog vs Jitsu — same comparison, one verdict.
Jitsu
MIT-licensed event pipeline, no licence footnotes.
Jitsu is the option with nothing to explain: MIT, self-hostable, real-time event collection into ClickHouse, BigQuery, Snowflake, Postgres and the rest. Around 4.8k stars. It is smaller than RudderStack and has fewer destinations, and that is the entire trade — you give up catalogue breadth and get a licence you can read in five minutes and never think about again. For a team whose legal review killed the last two candidates, that is often the deciding feature.
PostHog
Skip the pipe — the analytics tool collects its own events.
The question worth asking before buying a customer data platform is whether you need one. A great many Segment deployments exist to feed a single analytics tool, and PostHog collects its own events, does product analytics, session replay, feature flags and experiments, and can export to your warehouse — no router in the middle. That removes an entire vendor, an entire bill and an entire failure mode. MIT core with an `ee/` enterprise carve-out, around 37k stars. If Segment's job in your stack is 'get events into one place', this deletes the job.
Side by side
| Jitsu | PostHog | |
|---|---|---|
| Sovereignty Score | 94 | 85 |
| Open source | Yes | Yes |
| Self-hostable | Yes | Yes |
| Local-first | Yes | Yes |
| License | MIT | MIT core, with an `ee/` enterprise directory carve-out |
| Pricing | Free and open source. Jitsu Cloud is a paid hosted option. | Generous free tier on cloud; self-hostable at no licence cost for the MIT core. |
Jitsu edges it on the Sovereignty Score, but the right pick depends on the trade-offs below.
Jitsu
Strengths
- +Genuinely MIT — no carve-outs, no source-available asterisk
- +Real-time streaming into the major warehouses
- +Lightweight enough to self-host without a platform team
- +Simple, readable architecture
Trade-offs
- −Far fewer destinations than RudderStack or Segment
- −Smaller community and fewer worked examples
- −No identity resolution to speak of
- −Less mature governance tooling
PostHog
Strengths
- +Removes the CDP entirely when analytics was the only destination
- +Analytics, replay, flags and experiments in one product
- +Self-hostable — behavioural data never leaves your infrastructure
- +Very generous free tier
Trade-offs
- −Not a real CDP — it will not fan out to fifty marketing tools
- −Self-hosting at volume means operating ClickHouse
- −The `ee/` directory is not MIT
- −Wrong answer if marketing genuinely needs many destinations
Related alternative guides
Facts verified 2026-08-03. Licenses and pricing change — spotted something out of date? That's a correction we want.