# PostHog — An open-source (MIT core) product analytics platform bundling event tracking, session replay, feature flags, and error tracking, free up to 1M analytics events per month with usage-based pricing beyond that.

By Noah — last updated & pricing verified September 15, 2026.

> **PostHog** is an open-source product analytics platform: it combines event-based analytics, session replay, feature flags, A/B testing, error tracking, surveys, and a data warehouse in a single tool rather than requiring separate point solutions.

PostHog's core codebase is MIT-licensed and available on GitHub, with a `posthog-foss` repository offered for teams that want strictly open-source code without any proprietary ('ee') features; the ee directory carries a separate license for enterprise-only capabilities. Most customers use PostHog's managed cloud (choosing a US or EU region), which prices usage per product independently — analytics events, session replays, feature flag requests, and data warehouse rows each have their own volume-based rate that decreases at higher usage tiers. The free tier (1M events, 5K session replays, and more per month, no credit card required) is generous enough for early-stage products to run entirely on it before usage-based billing kicks in.

## Facts

- Website: https://posthog.com
- Pricing: Free (verified undefined NaN, NaN)
- License: Open core
- Platforms: web
- Best for: product and engineering teams who want analytics, session replay, feature flags, and error tracking in one platform instead of stitching together separate tools
- Standout feature: One platform combining product analytics, session replay, feature flags/A-B testing, error tracking, and a data warehouse, each billed on its own usage-based rate that drops at higher volume.
- Biggest weakness: Usage-based pricing across many separate products (events, replays, flags, surveys, data warehouse rows) makes total monthly cost harder to predict than a single flat per-seat price, and some enterprise features live in a separate proprietary ('ee') license rather than the fully open-source core.
- Third-party ratings: Product Hunt 5/5 (253 reviews)
- Categories: [Web & Product Analytics](https://findalternative.to/categories/web-analytics)

## Pricing snapshot

| Plan | Price | Notes |
| --- | --- | --- |
| Free | $0/mo | No credit card required; 1M analytics events, 5,000 session replays, 1M feature flag requests, 100K error tracking exceptions, and more per month. |
| Pay-as-you-go | Custom | Usage-based billing beyond free tier limits; analytics events from $0.00005 each (1-2M/month) down to $0.000009 each above 250M/month, with similar declining-rate pricing per product (session replay, feature flags, surveys, data warehouse). |

## Pros and cons

- Pro: Combines analytics, session replay, feature flags, error tracking, and surveys in one platform.
- Pro: Generous free tier: 1M analytics events and 5,000 session replays per month with no credit card required.
- Pro: MIT-licensed core with source available on GitHub, plus a dedicated posthog-foss repository for strictly open-source use.
- Pro: Choice of US or EU cloud region, or self-hosting.
- Con: Usage-based pricing spans multiple products independently, making total monthly cost harder to forecast than flat per-seat pricing.
- Con: Some enterprise features are gated behind a separate proprietary license (the 'ee' directory), not the fully open-source core.
- Con: Self-hosting PostHog at scale requires more operational overhead than using the managed cloud.
- Con: The breadth of bundled tools (analytics, replay, flags, surveys, data warehouse) means new users face a wider surface area to learn than a single-purpose analytics tool.

## AI summary

- PostHog's core is MIT-licensed and open source on GitHub.
- PostHog's free tier includes 1M analytics events and 5,000 session replays per month with no credit card required.
- PostHog bundles analytics, session replay, feature flags, error tracking, surveys, and a data warehouse in one platform.
- PostHog offers US or EU cloud hosting, or self-hosting.
- Best for: Product and engineering teams wanting analytics, replay, feature flags, and error tracking in one platform.
- Pricing: Free up to 1M events/month; usage-based pricing beyond that starting at $0.00005 per event.
- Top alternatives: Mixpanel, Amplitude, Google Analytics
- Limitation: Usage-based pricing across multiple products makes total cost harder to predict than flat per-seat pricing.
- Limitation: Some enterprise features are gated behind a separate proprietary license, not the open-source core.
- Limitation: Self-hosting at scale requires more operational overhead than the managed cloud.

## Alternatives

4 vetted alternatives to PostHog: https://findalternative.to/posthog — top picks: Mixpanel, Amplitude, Google Analytics

## Comparisons

- https://findalternative.to/compare/google-analytics-vs-posthog

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