Countly vs PostHog: which one to choose in 2026?
Both are open source alternatives to Mixpanel. We compare license, tech stack and features to help you decide which fits your team best.
| Countly | PostHog | |
|---|---|---|
| Category | Web Analytics | Web Analytics |
| License | AGPL-3.0 | MIT |
| GitHub stars | 4k | 24k |
| Tech stack | Node.js, MongoDB | Django, React, ClickHouse, PostgreSQL |
| Replaces | Mixpanel | Mixpanel, Amplitude |
PostHog has more GitHub stars, which usually indicates a larger community (not necessarily that it's the best option for your use case).
Countly
Web and mobile product analytics, an alternative to Mixpanel.
Pros
- Strong support for native mobile SDKs
Things to consider
- The community edition has fewer features than the Enterprise one
PostHog
Product analytics + feature flags + A/B testing, all in one.
Pros
- Replaces several SaaS tools at once
Things to consider
- Large-scale self-hosted deployment needs more pieces (ClickHouse, Kafka)
Key features
Countly
- User funnels and retention
- Native mobile app analytics
- User segmentation
PostHog
- Session replay and heatmaps
- Feature flags and A/B experiments
- Funnels, retention and cohorts