LangChain
Most popular open-source library for building with LLMs. LangSmith adds production observability. Used by Klarna, Rakuten, and most AI startups.
- Location
- San Francisco, United States
- Raised
- $35M+
- Stage
- Series A
- Founded
- 2022
- Category
- AI
- Funding
- VC-backed
- Team
- 11-50
Funding figures as of Jul 2025 · not independently verified
Founders of LangChain
- Harrison Chase
- Ankush Gola
Investors backing LangChain
- Sequoia
- Benchmark
Frequently asked questions
What does LangChain do?
Most popular open-source library for building with LLMs. LangSmith adds production observability. Used by Klarna, Rakuten, and most AI startups.
Where is LangChain based?
LangChain is based in San Francisco, United States.
When was LangChain founded?
LangChain was founded in 2022.
How much has LangChain raised?
LangChain has raised $35M+ in their Series A round as of Jul 2025.
Who founded LangChain?
LangChain was founded by Harrison Chase, Ankush Gola.
Who has invested in LangChain?
LangChain is backed by Sequoia, Benchmark.
How LangChain would pitch themselves
○ Auto-generated01Target customer
LLM apps — the core audience LangChain's product is built around.
02Problem they solve
Most popular open-source library for building with LLMs. LangSmith adds production observability. Used by Klarna, Rakuten, and most AI startups. The category has historically been served by tools that miss the modern workflow this product is built around.
03Key differentiator
LangChain differentiates on the framework + platform for llm apps. Backed by Sequoia + Benchmark, $35M+ raised — the company has resources + validation to compound this thesis. Founded by Harrison Chase + team.
04Go-to-market strategy
Series-A scaling stage — building outbound sales motion, hiring first AEs, layering on customer success. Mix of PLG (where the product allows) + direct sales for higher-ACV deals.