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LangChain

https://www.langchain.com Research Team Data
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Open-source frameworks and commercial platform for building, testing, deploying, and operating reliable AI agents and LLM applications.

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
Jun 21, 2026

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

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 segment/industry tags from this text is a future phase.

Attribute breakdown

  • AI Workflows Primary focus
  • AI Automation / Business Process Automation Secondary feature
  • Agent Builder / Agent Configuration Secondary feature
  • Multi-agent Orchestration / Runtime Primary focus
  • System / API Integration Primary focus
  • Prompt Management / Prompt Engineering Secondary feature
  • Retrieval-Augmented Generation Primary focus
  • Graph RAG / Knowledge Graph Retrieval Secondary feature
  • Enterprise Search / Knowledge Management Secondary feature
  • AI / LLM Data Pipeline Secondary feature
  • Document AI / Document Processing Secondary feature
  • Model Deployment / Inference Infrastructure Secondary feature
  • AI Quality Assurance / LLM Evaluation Secondary feature
  • AI Observability / Monitoring Secondary feature
  • AI Security / Guardrails Primary focus
  • Data Privacy / PII / Confidential AI Secondary feature
  • AI Governance / Policy Management Secondary feature
  • AI Risk / Compliance Secondary feature
  • AI Asset Inventory / Model Registry Secondary feature
  • Human-in-the-Loop Review / Feedback Secondary feature
  • Text Chatbots / Conversational Assistants Secondary feature
  • Enterprise App / Internal Tool Builder Primary focus
Show all 32 attributes
  • AI Workflows Primary focus
  • AI Automation / Business Process Automation Secondary feature
  • AI Fine-tuning / Custom Model Training Not emphasized
  • Agent Builder / Agent Configuration Secondary feature
  • Multi-agent Orchestration / Runtime Primary focus
  • System / API Integration Primary focus
  • Prompt Management / Prompt Engineering Secondary feature
  • Retrieval-Augmented Generation Primary focus
  • Graph RAG / Knowledge Graph Retrieval Secondary feature
  • Enterprise Search / Knowledge Management Secondary feature
  • AI / LLM Data Pipeline Secondary feature
  • Document AI / Document Processing Secondary feature
  • Model Deployment / Inference Infrastructure Secondary feature
  • Traditional Machine Learning Not emphasized
  • AI Quality Assurance / LLM Evaluation Secondary feature
  • AI Observability / Monitoring Secondary feature
  • AI Security / Guardrails Primary focus
  • Data Privacy / PII / Confidential AI Secondary feature
  • AI Governance / Policy Management Secondary feature
  • AI Risk / Compliance Secondary feature
  • AI Asset Inventory / Model Registry Secondary feature
  • Human-in-the-Loop Review / Feedback Secondary feature
  • Call Transcription / Speech-to-Text Data Capture Not emphasized
  • Conversation Intelligence / Speech Analytics Not emphasized
  • Text Chatbots / Conversational Assistants Secondary feature
  • Voice AI Agents Not emphasized
  • Voice Infrastructure / STT / TTS Not emphasized
  • AI for Customer Experience / Support Automation Not emphasized
  • Sales / Revenue Intelligence Not emphasized
  • Analytics / BI / Decision Intelligence Not emphasized
  • Enterprise App / Internal Tool Builder Primary focus
  • Vertical-Specific AI Not emphasized