# Countly vs Optimizely Experimentation (slim)

> Optimizely Experimentation scores 62.6 (B) on agent readiness against Countly's 54.8 (C), and leads in 4 of 7 scored categories. Countly leads on payments & pricing. Both do analytics query. Category scores, facts, verdicts and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/countly-vs-optimizely.md (~2,500 tokens) · this version ~730 tokens · JSON https://www.anchorterminal.com/compare/countly-vs-optimizely.json · canonical https://www.anchorterminal.com/compare/countly-vs-optimizely
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-09

Optimizely Experimentation scores 62.6 (B) on agent readiness against Countly's 54.8 (C), and leads in 4 of 7 scored categories. Countly leads on payments & pricing. Both do analytics query.

- Countly: C 54.8, rank #607 of 842 · https://www.anchorterminal.com/tools/countly.min.md
- Optimizely Experimentation: B 62.6, rank #383 of 842 · https://www.anchorterminal.com/tools/optimizely.min.md
- Countly, good for An agent whose owner runs Countly on its own infrastructure or a dedicated Flex server and wants analytics, crash and remote-config data through MCP with per-category permissions. Ahead on Payments & pricing, 17 against 0. Also Runs on your own machine; 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. Ahead on Reliability, 73 against 28; Transparency & trust, 75 against 70.

| Category | Countly | Optimizely Experimentation |
| --- | --- | --- |
| Reliability (16%) | 28 | 73 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 75 | 74 |
| Agent ergonomics (13%) | 66 | 68 |
| Security & auth (14%) | 63 | 66 |
| Payments & pricing (10%) | 17 | 0 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 80 | 78 |
| Transparency & trust (7%) | 70 | 75 |

| Fact (where they differ) | Countly | Optimizely Experimentation |
| --- | --- | --- |
| Vendor | Countly Ltd | Optimizely |
| Hosted endpoint | `https://mcp.count.ly/mcp` | `https://exp.mcp.opal.optimizely.com/mcp` |
| Transports | HTTP, stdio, Streamable HTTP | HTTP, Streamable HTTP |
| Auth | API key | OAuth or key |
| Licence | Countly Lite is AGPL-3.0 with added branding terms under Section 7. Enterprise plugins are proprietary. Flex is a hosted service under Countly's terms. The MCP server is MIT | 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 | 209 | 7 |
| Read-only variant documented | yes | no |
| Last release | 2026-10-07 | 2026-09-18 |
| Terms last updated | 2026-09-25 | no date given |
| Privacy policy last updated | 2026-09-25 | no date given |
| Terms restrict benchmarking | not found in the text | yes |
| Terms or service can change without notice | yes | not found in the text |
| Popularity | 28k npm/wk | 460k npm/wk, 86k PyPI/wk |