# GrowthBook vs PostHog (slim)

> GrowthBook scores 70.1 (BB) on agent readiness against PostHog's 68.4 (B), and leads in 1 of 7 scored categories. PostHog leads on schema & documentation, security & auth and transparency & trust. Both do analytics experiments. Category scores, facts, verdicts and agent notes…

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GrowthBook scores 70.1 (BB) on agent readiness against PostHog's 68.4 (B), and leads in 1 of 7 scored categories. PostHog leads on schema & documentation, security & auth and transparency & trust. Both do analytics experiments.

- GrowthBook: BB 70.1, rank #155 of 842 · https://www.anchorterminal.com/tools/growthbook.min.md
- PostHog: B 68.4, rank #204 of 842 · https://www.anchorterminal.com/tools/posthog.min.md
- GrowthBook, good for Teams that want flags and experiments analysed against their own warehouse, with an open-source core and a self-hosted option. Ahead on Reliability, 86 against 74. Also Agent-ready, a grade of BB or better; Runs on your own machine.
- PostHog, good for An agent that answers product questions in SQL or with funnel, retention and trends queries, and that manages feature flags, experiments and error tracking in the same project. Ahead on Schema & documentation, 81 against 76; Security & auth, 84 against 68; Transparency & trust, 83 against 74.

| Category | GrowthBook | PostHog |
| --- | --- | --- |
| Reliability (16%) | 86 | 74 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 76 | 81 |
| Agent ergonomics (13%) | 76 | 78 |
| Security & auth (14%) | 68 | 84 |
| Payments & pricing (10%) | 40 | 40 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 89 | 89 |
| Transparency & trust (7%) | 74 | 83 |

| Fact (where they differ) | GrowthBook | PostHog |
| --- | --- | --- |
| Vendor | GrowthBook, Inc. | PostHog Inc. |
| Hosted endpoint | `https://mcp.growthbook.io/mcp` | `https://us.posthog.com` |
| Transports | HTTP, Streamable HTTP, stdio | HTTP, Streamable HTTP |
| Licence | MIT for the core and for the MCP server. Three enterprise directories in the main repository are under GrowthBook's enterprise licence. GrowthBook Cloud is a hosted service under the Customer Agreement | MIT for the repository outside the `ee` directory, which has its own licence. PostHog Cloud is a hosted service under PostHog's terms |
| Tools exposed | 4 | 1096 |
| Read-only variant documented | no | yes |
| MCP registry | `io.github.growthbook/growthbook-mcp` | `io.github.PostHog/mcp` |
| Last release | 2026-10-06 | 2026-10-05 |
| Terms last updated | 2025-06-19 | 2026-06-29 |
| Privacy policy last updated | 2026-06-08 | 2026-06-29 |
| Customer content may train models | yes | yes, with an opt-out |
| Popularity | 8.5k stars, 1.3M npm/wk, 433k PyPI/wk | 40k stars, 15.2M npm/wk |