LangChain
Framework and platform for building, tracing and deploying AI agents.
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About LangChain
LangChain is a set of tools for building AI agents. The LangChain framework gets an agent started with any model provider, LangGraph gives low-level control over how an agent runs, and deep agents handle long-running autonomous work. LangSmith is the observability and deployment platform for tracing, evaluating and monitoring agents and running them in production.
LangSmith has a free Developer plan for one seat with up to 5,000 base traces a month, then pay-as-you-go. The Plus plan is priced per seat and includes 10,000 base traces a month, deployment access and unlimited seats. Enterprise adds self-hosted or hybrid deployment, custom SSO, role-based and attribute-based access control and SLA support.
Our take
- Good for
- developers building, tracing and deploying their own AI agents.
- Skip it if
- nobody on your team writes code.
- The catch
- the framework is free and open source, but managed deployment and trace storage are billed on usage, and sources disagree on current rates, so use the official calculator.
Checked . Plans and limits change, so confirm them on the vendor's site before you buy.