# GrowthBook vs Optimizely Experimentation (slim)

> GrowthBook scores 70.1 (BB) on agent readiness against Optimizely Experimentation's 62.6 (B), and leads in 6 of 7 scored categories. Both do analytics experiments. Category scores, facts, verdicts and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/growthbook-vs-optimizely.md (~2,450 tokens) · this version ~780 tokens · JSON https://www.anchorterminal.com/compare/growthbook-vs-optimizely.json · canonical https://www.anchorterminal.com/compare/growthbook-vs-optimizely
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-08

GrowthBook scores 70.1 (BB) on agent readiness against Optimizely Experimentation's 62.6 (B), and leads in 6 of 7 scored categories. Both do analytics experiments.

- GrowthBook: BB 70.1, rank #142 of 722 · https://www.anchorterminal.com/tools/growthbook.min.md
- Optimizely Experimentation: B 62.6, rank #330 of 722 · https://www.anchorterminal.com/tools/optimizely.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 73; Agent ergonomics, 76 against 68; Payments & pricing, 40 against 0; Maintenance & community, 89 against 78. Also Agent-ready, a grade of BB or better; Runs on your own machine; Free to start without a card; Open source.
- Optimizely Experimentation, good for An agent working for an existing Optimizely customer that lists and creates flags, experiments and audiences, reads experiment results and writes SDK integration code. Also No incidents deducted, where GrowthBook loses 3 points for them.

| Category | GrowthBook | Optimizely Experimentation |
| --- | --- | --- |
| Reliability (16%) | 86 | 73 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 76 | 74 |
| Agent ergonomics (13%) | 76 | 68 |
| Security & auth (14%) | 68 | 66 |
| Payments & pricing (10%) | 40 | 0 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 89 | 78 |
| Transparency & trust (7%) | 74 | 75 |

| Fact (where they differ) | GrowthBook | Optimizely Experimentation |
| --- | --- | --- |
| Vendor | GrowthBook, Inc. | Optimizely |
| Hosted endpoint | `https://mcp.growthbook.io/mcp` | `https://exp.mcp.opal.optimizely.com/mcp` |
| Transports | HTTP, Streamable HTTP, stdio | HTTP, Streamable HTTP |
| Pricing | Freemium | Paid |
| 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 | Proprietary hosted service under Optimizely's Online Software Subscription Agreement and its API, SDK and MCP terms. The Feature Experimentation SDKs on GitHub are Apache 2.0 |
| Tools exposed | 4 | 7 |
| MCP registry | `io.github.growthbook/growthbook-mcp` | not listed |
| Last release | 2026-10-06 | 2026-09-18 |
| Terms last updated | 2025-06-19 | no date given |
| Privacy policy last updated | 2026-06-08 | no date given |
| Customer content may train models | yes | not found in the text |
| Popularity | 8.5k stars, 1.3M npm/wk, 433k PyPI/wk | 460k npm/wk, 86k PyPI/wk |