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

> Langfuse API + MCP has a score of 72.8 (BB) against Braintrust API + MCP's 61.3 (C). Both do obs traces. The largest gap is reliability, 19 points. Category scores, facts, verdicts and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/braintrust-vs-langfuse.md (~1,750 tokens) · this version ~330 tokens · JSON https://www.anchorterminal.com/compare/braintrust-vs-langfuse.json · canonical https://www.anchorterminal.com/compare/braintrust-vs-langfuse
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-05

Langfuse API + MCP has a score of 72.8 (BB) against Braintrust API + MCP's 61.3 (C). Both do obs traces. The largest gap is reliability, 19 points.

- Braintrust API + MCP: C 61.3, rank #229 of 452 · https://www.anchorterminal.com/tools/braintrust.min.md
- Langfuse API + MCP: BB 72.8, rank #66 of 452 · https://www.anchorterminal.com/tools/langfuse.min.md
- Pick Braintrust API + MCP for nothing in particular. Pick Langfuse API + MCP for reliability (+19), schema & documentation (+8), agent ergonomics (+8), security & auth (+7), transparency & trust (+19).

| Category | Braintrust API + MCP | Langfuse API + MCP |
| --- | --- | --- |
| Reliability (16%) | 61 | 80 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 85 | 93 |
| Agent ergonomics (13%) | 66 | 74 |
| Security & auth (14%) | 58 | 65 |
| Payments & pricing (10%) | 40 | 40 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 85 | 88 |
| Transparency & trust (7%) | 68 | 87 |