# Helicone AI Gateway + MCP vs LangSmith API + MCP (slim)

> LangSmith API + MCP has a score of 71.3 (BB) against Helicone AI Gateway + MCP's 47.1 (D). Both do obs traces. The largest gap is reliability, 31 points. Category scores, facts, verdicts and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/helicone-vs-langsmith.md (~1,750 tokens) · this version ~380 tokens · JSON https://www.anchorterminal.com/compare/helicone-vs-langsmith.json · canonical https://www.anchorterminal.com/compare/helicone-vs-langsmith
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-05

LangSmith API + MCP has a score of 71.3 (BB) against Helicone AI Gateway + MCP's 47.1 (D). Both do obs traces. The largest gap is reliability, 31 points.

- Helicone AI Gateway + MCP: D 47.1, rank #387 of 452 · https://www.anchorterminal.com/tools/helicone.min.md
- LangSmith API + MCP: BB 71.3, rank #85 of 452 · https://www.anchorterminal.com/tools/langsmith.min.md
- Pick Helicone AI Gateway + MCP for nothing in particular. Pick LangSmith API + MCP for reliability (+31), schema & documentation (+17), agent ergonomics (+6), security & auth (+27), payments & pricing (+10), maintenance & community (+19), transparency & trust (+7).

| Category | Helicone AI Gateway + MCP | LangSmith API + MCP |
| --- | --- | --- |
| Reliability (16%) | 50 | 81 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 69 | 86 |
| Agent ergonomics (13%) | 70 | 76 |
| Security & auth (14%) | 50 | 77 |
| Payments & pricing (10%) | 30 | 40 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 66 | 85 |
| Transparency & trust (7%) | 71 | 78 |