At a glance
- LangSmith is listed under LLM observability, alongside Braintrust, Confident AI and Helicone.
- LangSmith has a free plan.
- LangSmith's lowest paid plan is Plus at $39 per seat per month, then pay as you go, as of November 14, 2026.
- LangSmith works with OpenAI SDK, Anthropic SDK, Vercel AI SDK, LlamaIndex, PagerDuty and others.
- LangSmith's main features: Agent tracing, Production monitoring, SmithDB trace search, Online and offline evals.
- LangSmith's website lists SSO.
- LangSmith can be self-hosted.
- We haven't confirmed whether LangSmith has a public API.
Facts from langchain.com, checked November 14, 2026.
AI summary
The summary writes itself once 5 people have reviewed this tool.
It's built only from what reviewers say: who it's best for, who should think twice, and what comes up again and again.
Reviews needed for a summary0 of 5
