LangChain
Category: AI Developer Tools
An open-source framework for developing applications powered by large language models (LLMs). LangChain was founded in 2023. The company is led by Harrison Chase. Based in San Francisco, CA, USA. Team size: 101-500. Total funding raised: $160M. Latest round: Series B. Key investors include IVP, Sequoia Capital, Benchmark, CapitalG, Sapphire Ventures, Amplify Partners, Conviction Partners, Lux Capital.
- Founded
- 2023
- Headquarters
- San Francisco, CA, USA
- Team size
- 101-500
- Total funding
- $160M
Value proposition
Simplifies the integration and orchestration of LLMs, enabling faster development and deployment of complex AI applications.
Products and solutions
LangChain (open-source framework), LangGraph (stateful multi-agent orchestration), LangSmith (observability, evaluation, and deployment), Deep Agents (agent harness for long-horizon autonomous agents)
Unique value
Modular, open-source framework that abstracts the complexity of building multi-step LLM workflows and has a massive developer community.
Target customer
Developers, enterprises, and startups building AI-powered applications.
Industries served
Technology/Software, Financial Services, Healthcare, E-commerce
Technology advantage
Strong open-source foundation combined with commercial enterprise offerings (LangSmith), and rapid innovation.
How they differentiate
Distinguishes itself with a strong open-source model, rapid innovation, and a large, active community.
Main competitors
LlamaIndex, Hugging Face's transformers, AI Orchestration Startups
Key partnerships
Integrations with major cloud providers (OpenAI, Microsoft Azure AI, Google Cloud AI), Vector databases
Notable customers
Elastic, Rakuten, Cisco, Replit, Klarna, Rippling, Clay, Workday, ServiceNow, Harvey, Cloudflare, LinkedIn
Major milestones
Open-sourced LangChain in late 2022, company formed early 2023 with co-founder Ankush Gola., Raised Seed ($10M, Benchmark), Series A ($25M, Sequoia), and Series B ($125M at $1.25B valuation, IVP, Oct 2025) — unicorn status., Launched LangSmith, LangGraph, Deep Agents, LangChain/LangGraph 1.0 (Oct 2025).
Growth metrics
The company has a significant developer community and has secured substantial venture funding.
Market positioning
A leading orchestration framework for large language models (LLMs).
Geographic focus
Global, with a strong presence in North America.
Patents and IP
No public patents mentioned; focus is on open-source leadership.
About Harrison Chase
Harrison Chase (Harvard CS/Statistics) led ML at Robust Intelligence and previously led entity linking / ML engineering at Kensho Technologies. Co-founded LangChain in 2022–2023. (Facebook/Meta experience belongs to co-founder Ankush Gola, not Chase.)
Latest news about LangChain
- LangChain announced a $125 M Series B round, pushing its valuation to $1.25 B and cementing its unicorn status. The capital will accelerate its agent‑engineering platform, including LangGraph and Lang
- LangChain has officially become an AI unicorn, securing $125 million in new funding at a $1.25 billion valuation. This capital injection validates the market's aggressive pivot from static LLMs to com
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Official website: https://www.langchain.com/
