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LangChain

Open-source framework for building LLM applications

langchain.com ↗
APIFree tierSOC 2
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Overall score

3.1/ 5
SME Fit2/5pricing pattern unclear + free tier · technical setup
JTBD4/5solid named JTBD
Integration4/5API + 12 integrations
Trust4/5mature, founded 2022
Quality1/5no public rating
Compliance5/5SOC 2 + GDPR + customer-choice residency

About

LangChain is an open-source framework for developing applications powered by language models. It provides building blocks for chains, agents, retrieval-augmented generation, and tool use, plus a managed observability product (LangSmith) and a stateful agent runtime (LangGraph).

Best for: Engineering teams building LLM-powered applications who want a battle-tested framework for chains, agents, and RAG with strong observability and a path to production.

Pricing

TierMonthlyAnnual /moBillingNotes
Developer (OSS)n/aFreeflatFull LangChain framework;LangGraph;5K free LangSmith traces/month;Community support · Open-source LangChain and LangGraph are free forever. LangSmith free tier covers individual builders.
Plus$39$39per_seatHigher LangSmith trace limits;Prompt management;Eval datasets;Email support
Enterprisen/an/acustomSelf-hosted LangSmith;SSO and SAML;Custom data residency;SOC 2 Type II;Dedicated support · Contact sales for pricing.

Key features

  • Composable chains and agents
  • 200+ LLM and vector-store integrations
  • LangGraph for stateful agent workflows
  • LangSmith for tracing and evals
  • Python and JavaScript SDKs
  • Open-source core

Integrations

OpenAIAnthropicGoogle GeminiMistralOllamaHugging FacePineconeWeaviateChromaPostgresLangSmithLangGraph

Trust & compliance

Stage range
n/a
Founded
2022
Status
active
SOC 2
yes
GDPR
yes
Data residency
customer_choice
External rating
n/a
Last verified
May 2026

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