LangChain

Open-Source LLM Framework — Building the Tools for AI Application Development

The consensus on LangChain: Choose LangChain if you want open-source DNA with massive developer-community impact and high autonomy — at a Series B stage where the agent-engineering platform thesis is expanding fast and roles stretch with it.

2022

Founded

San Francisco

Headquarters

~325

Employees

$1.25B

Series B (Oct 2025)

Culture Overview

What it's really like to work at LangChain

Founded in 2022 by Harrison Chase and Ankush Gola, LangChain is the open-source framework powering millions of LLM applications worldwide — and now the platform behind LangSmith and LangGraph for agent engineering. The team raised a $125M Series B at a $1.25B valuation in October 2025, led by IVP, with continued backing from Sequoia, Benchmark, CapitalG, and strategic investors including Datadog, Databricks, ServiceNow Ventures, and Workday Ventures. The culture is deeply OSS-rooted with a massive developer community, engineers ship fast with high autonomy, and the company is scaling hard against an agent-engineering platform thesis.

Glassdoor Ratings

LangChain Glassdoor Ratings & Employee Reviews

4.6

Overall Glassdoor Score

Based on ~15 reviews (RepVue)

Culture & Values 4.5

Compensation & Benefits 4.3

Senior Management 4.2

Career Opportunities 4.0

Work-Life Balance 4.0

Overall Rating 4.6

Too Few Reviews

CEO: Harrison Chase

Employee Review Themes

Working at LangChain: Pros & Cons

✓ What employees love

✓ Open-source DNA with massive community — your work reaches millions of developers
✓ High autonomy and engineer ownership — ship fast on systems used in production by enterprise customers
✓ Working at the epicenter of the agent-engineering and LLM application ecosystem
✓ Strategic enterprise backers (Datadog, Databricks, ServiceNow, Workday) translate into real customer reach
✓ Series B comp packages competitive with frontier AI labs for senior engineering roles

✗ What could be better

✗ Series B growing pains — processes still catching up to the pace of hiring (325 people and counting)
✗ Role scope can shift as the platform thesis expands beyond core OSS into LangSmith, LangGraph, and agent infra
✗ Open-source pressure — community expectations on response times and feature requests can be demanding
✗ High-velocity environment — long hours during major launches are common

Engineering Culture

How the engineering team works

Tech Stack

Python TypeScript LangGraph LangSmith FastAPI

Open Source

Core product is open source (130k+ GitHub stars). LangChain, LangGraph, and LangSmith form the leading LLM development stack. Community-driven development model.

Engineering Blog

Active blog covering LLM application patterns, agent architectures, and retrieval-augmented generation. Read the blog →

Team Structure

Flat, open-source-native team. Engineers contribute across the entire stack. Strong async communication with a community-first development approach.

Open Positions

Join the LangChain team

... open positions.

🌐 Remote

✕ Clear

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