Summary
Open-source frameworks and commercial platform for building, testing, deploying, and operating reliable AI agents and LLM applications.
Description
LangChain provides open-source frameworks including LangChain and LangGraph plus commercial LangSmith tooling for tracing, evals, prompts, monitoring and agent deployment. The company now positions around agent engineering and reliable agent development.
Positioning
Agent engineering platform
Key facts
- HQ location
- San Francisco, CA, USA
- Founded
- 2022
- Employee range
- 201-500 (~304 / 201-500 range)
- Funding stage
- Series B
- Company type
- Private (Private / open-source commercial)
- Pricing model
- Licensing Open Source Subscription Usage Based (Open-source framework plus usage-based LangSmith SaaS plans and enterprise)
- Last updated
Financials
- Revenue estimate
- Unknown / not publicly disclosed
- Valuation estimate
- $1.25B (Series B, Oct 2025)
- Investments
- $125M Series B announced Oct 2025; prior Series A/extensions; total funding not fully reconciled in public sources
Relationships
- Target customers
- Developers, AI engineers, platform teams and enterprises building LLM applications and agents
- Key competitors
- LlamaIndex, Haystack/deepset, Semantic Kernel, Vellum, CrewAI, Langfuse, Braintrust
- Known customers
- Replit, Clay, Harvey, Vanta, Cloudflare, Rippling, Cisco, Workday
Classification (raw research text)
- Core focus
- LLM application and agent engineering
- Core industry
- Developer Tools / Enterprise AI
- Core category
- LLM orchestration and agent framework
Shown verbatim from the research spreadsheet — deriving structured industry tags from this text is a future phase.
Segments, Industries & Certifications
- Segments