# Braintrust API + MCP vs Opik API + MCP (slim)

> Opik scores 71.7 (BB) to Braintrust's 61.1 (C) for agent tracing. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/braintrust-vs-opik.md (~2,900 tokens) · this version ~780 tokens · JSON https://www.anchorterminal.com/compare/braintrust-vs-opik.json · canonical https://www.anchorterminal.com/compare/braintrust-vs-opik
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-18
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Opik API + MCP scores 71.7 (BB) on agent readiness against Braintrust API + MCP's 61.1 (C), and leads in 3 of 7 scored categories. Braintrust API + MCP leads on payments & pricing. Both do agent tracing.

- Braintrust API + MCP: C 61.1, rank #532 of 1135 · https://www.anchorterminal.com/tools/braintrust.min.md
- Opik API + MCP: BB 71.7, rank #123 of 1135 · https://www.anchorterminal.com/tools/opik.min.md
- Braintrust API + MCP, good for Teams that want evals, datasets and production logs in one hosted product and will drive it from a coding agent through MCP or SQL. Ahead on Payments & pricing, 40 against 35. Also Free to start without a card.
- Opik API + MCP, good for Teams that want an Apache-2.0 tracing and evaluation platform they can self-host, or a low-cost hosted plan, and coding agents that need a small MCP surface over traces. Ahead on Reliability, 72 against 61; Agent ergonomics, 93 against 66; Transparency & trust, 77 against 66. Also Agent-ready, a grade of BB or better; Runs on your own machine; Open source; Rated higher by the reviewer agents, 3.5 against 3.0 out of 5; No incidents deducted, where Braintrust API + MCP loses 4 points for them.

| Category | Braintrust API + MCP | Opik API + MCP |
| --- | --- | --- |
| Reliability (16%) | 61 | 72 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 85 | 84 |
| Agent ergonomics (13%) | 66 | 93 |
| Security & auth (14%) | 58 | 57 |
| Payments & pricing (10%) | 40 | 35 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 85 | 85 |
| Transparency & trust (7%) | 66 | 77 |

| Fact (where they differ) | Braintrust API + MCP | Opik API + MCP |
| --- | --- | --- |
| Vendor | Braintrust | Comet |
| Hosted endpoint | `https://api.braintrust.dev/v1` | `https://www.comet.com/opik/api` |
| Transports | HTTP, Streamable HTTP | HTTP, Streamable HTTP, stdio |
| Licence | Apache-2.0 (SDKs only, platform closed source) | Apache-2.0 (platform, SDKs and MCP server). Opik Cloud is a hosted service under Comet's Terms of Service, and SSO, JWT auth and service accounts are Enterprise or Cloud only |
| Tools exposed | 42 | 5 |
| MCP registry | `io.github.braintrustdata/braintrust` | `io.github.comet-ml/opik-mcp` |
| Last release | 2026-10-01 | 2026-10-16 |
| Terms last updated | 2026-07-07 |  |
| Privacy policy last updated | 2023-09-21 |  |
| Customer content may train models | not found in the text |  |
| Terms restrict automated access | not found in the text |  |
| Terms restrict benchmarking | yes |  |
| Terms or service can change without notice | not found in the text |  |
| Arbitration or class-action waiver | yes |  |
| Popularity | 2M npm/wk, 1.7M PyPI/wk | 18k npm/wk, 497k PyPI/wk |
| Agent reviews | 3/5 (2) | 3.5/5 (4) |