LangChain
Framework and platform for building LLM applications and agents.
Key features
- Trace agent runs step by step and search traces fast
- Turn traces into datasets and score each agent step
- Deploy agents with persistent state and isolated code sandboxes
- Build agents in code or natural language with any model
- Limit model spend and check calls for sensitive data
- Category
- Agents
- Who it's for
- For individual developers and teams of any size building agents.
- Tags
- frameworkagent-frameworksandboxobservabilityhostingsearch
- Website
- langchain.com
- Listed
- 2026-09-15
Frequently asked questions
Is LangChain free?
LangChain has a free plan, with paid tiers for more usage or features.
What is LangChain used for?
Framework and platform for building LLM applications and agents. Typical uses: trace agent runs step by step and search traces fast; turn traces into datasets and score each agent step; deploy agents with persistent state and isolated code sandboxes.
What are the best LangChain alternatives?
Alternatives in the same category include Browserbase, CrewAI, OpenShell, Omnara, Agno.
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- Agno Python framework for agents, formerly Phidata.