Key facts
- Company
- LangChain
- Released
- 2022-10
- Stack layer
- Agents
- Sector
- Agent Platforms
- Region
- Global
- Pricing
- free — Open-source (MIT)
- API
- Available
What it does
LangChain is the most widely adopted open-source framework for building LLM-powered applications, providing chains, agents, retrievers, and tool-use abstractions. Its vocabulary (chains, agents, tools, memory) has become the de-facto standard for LLM app development, used by the majority of AI startups and enterprise teams. LangGraph extends it for stateful multi-agent workflows; LangSmith provides the paired observability layer.
How it scores
Backed by cited sources and recorded adoption. Five independent signals — no blended total. Ranks compare every product in the same sector.
Sector avg 73 · +9 above sector average · #5 of 73 in Agent Platforms
Strategic product impact based on technical depth, market relevance, adoption signal, and importance to the AI stack
Sector avg 73 · at the sector average · #24 of 73 in Agent Platforms
Competitiveness based on real global adoption, named international customers, regulatory reach, and global infrastructure fit
Sector avg 73 · -5 below sector average · #65 of 73 in Agent Platforms
Defensibility against ChatGPT or Claude based on workflow depth, proprietary data, switching cost, regulatory or hardware constraints, and user loyalty; generic legal or health advice surfaces are penalized
Sector avg 57 · -4 below sector average · #47 of 73 in Agent Platforms
Size-normalized score for products that punch above company scale
Sector avg 88% · at the sector average · #35 of 73 in Agent Platforms
Share of the product's value that comes from AI itself rather than the software wrapped around it
Key Features
Pricing
Where it sits in the AI stack
View all in Agent Platforms (73)Company
View company profile →American open-source LLM application framework with the largest developer community in the AI stack. LangChain enables chaining LLM calls, tool use, and memory management. LangSmith provides LLM observability and testing. LangGraph enables multi-agent workflow orchestration. 100M+ PyPI downloads.
- Stage
- Series B
- Category
- Agent Platforms
- Headquarters
- Global
- Founded
- 2022
- Market cap
- $1.25B
- Valuation
- $1.25B (Series B, Oct 2025)
- Total funding
- $160M
- Founder
- Harrison Chase · CEO & Co-founder
Latest disclosed round
2025-10 · Series B · $125M · $1.25B
IVP, CapitalG, Sapphire
Competitors
Similar products
Closest sector peers by Impact
More from LangChain
Other products from this company
LangChain
Agent platform for orchestrating model-driven work across tools, data sources, and enterprise workflows.
Evidence & sources
Adoption signal
90K+ GitHub stars; pip installs in the hundreds of millions; used by the majority of AI teams building LLM applications.
Why this score
De-facto orchestration standard for LLM app development. No disclosed userCount keeps it below the adoption cap. Framework vocabulary and abstractions are embedded across the open-source ecosystem; strong developer lock-in. Score capped at 82 (agent platform ceiling) pending disclosed adoption metrics.