Flagsmith vs PostHog
A side-by-side comparison of two self-hosted web analytics options — licensing, setup difficulty, resource needs, and what each one replaces.
Not the right match-up?
Flagsmith
Open-source feature flag and remote config service
VS
PostHog
Open-source product analytics platform
| Feature | Flagsmith | PostHog |
|---|---|---|
| Category | Web Analytics | Web Analytics |
| License | BSD-3-Clause | MIT |
| Language | Python | Python |
| Setup difficulty | Medium | Hard |
| Min. RAM | 1,024 MB | 4,096 MB |
| Deployment | docker, kubernetes, helm | docker, kubernetes |
| GitHub stars | ★ 6,505 | ★ 37,548 |
| First released | 2018 | 2020 |
| Replaces | LaunchDarkly | Google Analytics, Mixpanel, Amplitude |
Why pick each one
Choose Flagsmith if…
- Released under the BSD-3-Clause license
- First-class Docker support for quick deployment
- Kubernetes-ready with Helm charts available
- Mature project with 6.5k GitHub stars
Frequently asked questions
Is Flagsmith or PostHog better?
Neither is universally better. PostHog has the larger community, while Flagsmith is simpler to set up (medium difficulty). Choose based on the comparison table above and your own setup.
Are Flagsmith and PostHog free and open-source?
Yes. Flagsmith is licensed under BSD-3-Clause and PostHog under MIT. Both can be self-hosted at no software cost.
Can I run Flagsmith and PostHog with Docker?
Flagsmith: yes. PostHog: yes.