LangChain
Featured
Developer Tools
LangChain
FreeOpen Source
About
Open-source framework for building LLM-powered applications quickly
Key Features
LangChain 1.0 agent framework
LangGraph stateful orchestration
Middleware for agent control
Standardized model integrations
LangSmith observability
Prebuilt agent patterns
Pricing
free
Open-source framework free
langsmith
LangSmith free tier + paid plans
enterprise
LangGraph Platform custom pricing
Use Cases
Building LLM-powered agents
RAG applications
Multi-step task automation
Conversational assistants
Tool-using agents
Production agent deployment
Pros
Rich ecosystem and integrations
Flexible agent orchestration
Strong observability tooling
Large community
Cons
Abstraction can add complexity
Frequent API changes historically
Requires coding skills
Latest Update
July 2026: LangChain and LangGraph reach 1.0 with a refined core agent loop and middleware architecture
Related Developer Tools Tools
Google AI Studio
Google
Google's free AI development platform to explore and call Gemini and other latest models with API integration
Cohere
Cohere
Enterprise AI platform specializing in RAG, embeddings and conversational models, Command R+ excels in multilingual
Groq
Groq
Ultra-fast AI inference platform with LPU architecture for millisecond responses, supporting Llama, Mixtral and other open models
OpenRouter
OpenRouter
Unified AI model API gateway, access 200+ models through a single interface with pay-as-you-go pricing and model comparison