Agent FrameworkFrameworkAgentsRAGPython
LangChain
The most popular framework for building LLM applications
4.6
Rating
5,800
Reviews
Free (open-source) / LangSmith from $39 mo
Pricing
Overview
LangChain is the most widely adopted framework for building LLM-powered applications, with 85K+ GitHub stars. It provides chains, agents, retrieval, and memory abstractions for Python and JavaScript.
Best for
RAG applications
LLM agent development
Multi-step chains
Prototype to production
Pros & Cons
✓ Pros
✓Largest community and ecosystem
✓Supports all major LLM providers
✓LangSmith for observability
✓Excellent documentation
✗ Cons
✗Abstraction overhead can be frustrating
✗Breaking changes between versions
✗Overkill for simple use cases
Use Cases
→Building RAG chatbots
→Multi-step document processing
→Agent tool-use pipelines
→Conversational search systems
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Quick Facts
CategoryAgent Framework
Rating4.6/5
Reviews5,800
PricingFree (open-source) / LangSmith from $39 mo
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