LangChain's tracing, monitoring and evaluation platform for agents.
WebsiteProvisional comparison
LangSmith vs Braintrust
LangSmith is provisional S-tier and Braintrust is provisional A-tier on Agent Observability & Evals. Rankings are never for sale.
Full Agent Observability & Evals tier list
AI observability and evals platform for tracing production and catching regressions.
Website| Field | LangSmith | Braintrust |
|---|---|---|
| Tier | S · provisional | A · provisional |
| Why | Most established agent tracing/eval platform; framework-agnostic. | Eval-first workflow popular with AI product teams. |
| Pricing | freemium · starts at $39/seat/mo (Plus) | freemium · starts at $249/mo |
| Last verified | Oct 15, 2026 | Oct 15, 2026 |