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

> Langfuse API + MCP has a score of 72.8 (BB) against LangSmith API + MCP's 71.3 (BB). Both do obs traces. The largest gap is security & auth, 12 points. Category scores, facts, verdicts and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/langfuse-vs-langsmith.md (~1,700 tokens) · this version ~330 tokens · JSON https://www.anchorterminal.com/compare/langfuse-vs-langsmith.json · canonical https://www.anchorterminal.com/compare/langfuse-vs-langsmith
- 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 LangSmith API + MCP's 71.3 (BB). Both do obs traces. The largest gap is security & auth, 12 points.

- Langfuse API + MCP: BB 72.8, rank #66 of 452 · https://www.anchorterminal.com/tools/langfuse.min.md
- LangSmith API + MCP: BB 71.3, rank #85 of 452 · https://www.anchorterminal.com/tools/langsmith.min.md
- Pick Langfuse API + MCP for schema & documentation (+7), transparency & trust (+9). Pick LangSmith API + MCP for security & auth (+12).

| Category | Langfuse API + MCP | LangSmith API + MCP |
| --- | --- | --- |
| Reliability (16%) | 80 | 81 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 93 | 86 |
| Agent ergonomics (13%) | 74 | 76 |
| Security & auth (14%) | 65 | 77 |
| Payments & pricing (10%) | 40 | 40 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 88 | 85 |
| Transparency & trust (7%) | 87 | 78 |