LangChain
by LangChain, Inc.🤖 AI AgentsOpen-source framework for LLM apps — chains, agents, RAG, LangGraph
Chains, agents, RAG, LangGraph, LangSmith tracing, open-source
Last updated: March 20, 2026 · Pricing verified from official sources. Prices are subject to change by the provider.
Pricing
Free TierYes — open-source unlimited
Entry Plan$39/seat/mo LangSmith
Team Plan—
EnterpriseCustom pricing
API PricingPython/JS SDK
Prices exclude applicable taxes (VAT/GST/sales tax varies by region).
Specifications
Context / Input—
Max OutputLLM applications
ModalitiesText
Agent / AgenticNo
SecurityBasic
Self-hostedYes
Best For
LLM app development, agent frameworks
Recommended roles:developer
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Frequently Asked Questions
How much does LangChain cost?
LangChain offers a free tier. Paid plans start at $39/month. Enterprise pricing is available on request.
Is LangChain free?
Yes, LangChain offers a free tier with limited features. For full access, paid plans start at $39/month.
What is LangChain best for?
LangChain is best for LLM app development, agent frameworks. Key features include: Chains, agents, RAG, LangGraph, LangSmith tracing, open-source.
Is LangChain right for you?
Get a personalised AI Fit Score based on your role, budget, team size, and priorities.
Start the recommendation wizardStart wizard aitoolsmentor.com · Pricing verified March 20, 2026 · AI Tools Mentor Fit Score