LangChain

Free tier

Platforms: mac, windows, linux | Last verified: 2026-04-03

Features

*LLM application framework
*Chain composition
*Agent framework
*RAG pipelines
*Memory management
*100+ integrations
*LangSmith observability

Pricing

Free: Open source framework, free to use

LangSmith Developer$0/month

LangSmith Plus$39/month

LangSmith Enterprise$0/month

Strengths

+Most popular LLM framework
+Huge ecosystem of integrations
+Active community and documentation
+LangSmith for debugging and monitoring

Limitations

-Can be overly complex for simple use cases
-Frequent breaking changes between versions
-Abstraction overhead adds latency

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