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LangChain

Open Source
RAG Stack Tools
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Comprehensive framework for building LLM applications. Chains, agents, and RAG capabilities.

Key Features

  • Chains
  • Agents
  • Memory
  • Multi-language

Pros

  • Very flexible
  • Large ecosystem
  • Multi-language
  • Extensive integrations

Cons

  • Complexity
  • Rapid changes
  • Can be heavy

Best Use Cases

Complex workflowsMulti-step agentsProduction apps