LangChain
The most popular open-source framework for building LLM applications
Top RatedLangChain is a comprehensive AI development framework that simplifies building applications with LLMs through modular components, chains, and agent orchestration, offering both open-source tools and commercial platforms.
Overall Rating
4.3
2341 reviews
Features4.5
Ease of Use3.6
Support4.0
Value4.4
Performance4.3
Company Information
Founded
2022
Headquarters
San Francisco, CA
Company Size
51-200 employees
Funding
$35M Series A
Pros
- Most popular LLM framework (72M+ downloads/month)
- Extensive integration ecosystem (600+)
- Strong developer community
- Model agnostic approach
- Comprehensive documentation
- Free open-source core
- Production-ready tools
- Active development and updates
Cons
- Steep learning curve for beginners
- Can be overly complex for simple use cases
- Requires coding knowledge (Python/JS)
- Frequent breaking changes in early versions
- Not optimized specifically for RAG like CustomGPT
Key Highlights
72M+ monthly downloads
600+ pre-built integrations
Most active LLM developer community
Comprehensive agent development suite
Free open-source core
Best Use Cases
LLM application development
Multi-agent systems
RAG applications
Chatbot development
Workflow automation
Document Q&A systems
AI agent orchestration
Complex chain composition
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