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LangChain
AddedMay 23, 2023
UpdatedMay 31, 2026
LangChain

LangChain

Series B

An open-source framework for developing applications powered by Large Language Models (LLMs).

HQ
San Francisco, CA, US
Founded
2023
Overview
Analysis
Compare
Fundraising
Employees
News
Website

LangChain is the leading open-source framework for building AI agents and applications powered by Large Language Models (LLMs). Founded by Harrison Chase and Ankush Gola in early 2023, LangChain provides a comprehensive ecosystem including the LangChain framework for orchestrating LLM chains, LangSmith for agent observability and evaluation, and LangGraph for building multi-agent workflows. The platform is designed to help developers prototype, ship, and monitor AI agents in production.

The company is used by thousands of companies including Rakuten, Elastic, Moody's, and Retool. LangChain raised a $10M Seed from Benchmark in April 2023, a $25M Series A led by Sequoia Capital in February 2024 at a $200M valuation, and a $125M Series B led by IVP in October 2025 at a $1.25B valuation, becoming a unicorn. LangChain is headquartered in San Francisco, California.

LangChain - Products & Services

  • LangGraph logo

    LangGraph

    Library for building multi-agent workflows with LLMs in production.

    Competing Products

    Lyzr AI logo
    Lyzr AI logo
    Lyzr AI logo
    Novus logo
    Doublezero logo
    Novus logo
  • LangSmith logo

    LangSmith

    Platform for building, testing, and monitoring AI agents in production.

    Competing Products

    Lyzr AI logo
    Lyzr AI logo
    Lyzr AI logo
    Patronus AI logo

LangChain - Similar Companies

Novus logo

Novus

novusasi.com

Patronus AI logo

Patronus AI

patronus.ai

Defog.ai logo

Defog.ai

Blocktool logo

Blocktool

Metal logo

Metal

metal.ai

Texel.ai logo

Texel.ai

texel.ai

Vellum logo

Vellum

vellum.ai

Baseplate logo

Baseplate

GradientJ logo

GradientJ

DataSuite logo

DataSuite

anarchy.ai

Double logo

Double

usedouble.com

MosaicML logo

MosaicML

OctoML logo

OctoML

octo.ai

LlamaIndex logo

LlamaIndex

llamaindex.ai

Langfuse logo

Langfuse

langfuse.com

LangChain - Quick Facts

Who are LangChain's competitors?

Companies similar to LangChain include Novus, Patronus AI, Defog.ai and Blocktool.

When was LangChain founded?

LangChain was founded in 2023.

Where is LangChain's headquarters located?

LangChain's headquarters is located in San Francisco, CA, US.

When was LangChain's last funding round?

LangChain's most recent funding round was for $125M (USD) in October 2025.

How much has LangChain raised to-date?

As of Oct 20, 2025, LangChain has raised a total of $160M (USD).

How many employees does LangChain have?

LangChain has 150 employees as of Oct 20, 2025.

LangChain - Classification

Ownership
  • Private
  • Venture Capital
Technology
  • AI
  • Machine Learning
Geographic Exposure
  • Global
Model
  • Platform
Revenue
  • Recurring
  • Software
Customer
  • Enterprise
Tags
  • API
  • GenAI
NAICS
  • 513200Software Publishers
  • 510000Information
  • 513000Publishing Industries
  • 513210Software Publishers
SIC
  • 7300Business Services
  • 7370Computer Programming, Data Processing, And Other Computer Related
  • 7372Prepackaged Software
Show 6 more industry codes
NAICS
  • 540000Professional, Scientific, and Technical Services
  • 541500Computer Systems Design and Related Services
  • 541000Professional, Scientific, and Technical Services
  • 541510Computer Systems Design and Related Services
  • 541511Custom Computer Programming Services
SIC
  • 7371Computer Programming Services