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#17ResearchBest Value
LangChain
LangChain
LLM application framework
Launch: October 1, 2022 · Data as of June 9, 2026
87
AI Score88
PowerOverview
LangChain 0.3 (2026) is the de facto standard for LLM applications in Python. LangSmith: monitoring, debugging, testing LLM chains. LangGraph: agentic workflows with state management. Supports OpenAI, Anthropic, Google, DeepSeek. 5M+ developers, +14.2% growth. MIT open-source. If you're building an LLM application in Python, LangChain is likely already in your dependencies.
The standard LLM application framework — LangSmith monitoring, LangGraph agents.
Capabilities
ChainsAgentsLangSmith
Quick facts
- Best for
- Science & RAG
- Free tier
- Free tier available
- Pricing
- Freemium
- Monthly users
- 4.0M
- Growth
- +12.4%
- Country
- USA
Pricing plans
Data as of May 29, 2026. For exact prices and limits, see the official service website.
Free$0
Limited usage
ProPaid
Higher limits, priority
Capabilities
- Text / LLM
- Images
- Video
- Audio
- Code
- API
- AI agents
Integrations
All LLMs
AI Score — breakdown
Intelligence85
Popularity80
Innovation90
Dev ecosystem96
Reliability82
Community92
Utility91
Speed78
API quality88
AI Score level: Excellent · Trend 77
Trend
Benchmarks
Dev adoption: 93