LangChain
Also known as: LangGraph, LangSmith
Open-source framework for building LLM-powered agents and multi-agent pipelines, with observability via LangSmith and graph orchestration via LangGraph.
Vendor details
Canonical URL
https://www.langchain.com/
Category
Agent infrastructure
Pricing model
Self-serve
Company status
independent
Use cases & customers
Target customers
Deployment options
Recent platform changes
LangGraph 1.2.6 fixed nested subgraph checkpoint namespace inheritance and cancellation of running subgraphs on v3 stream abort.
View sourcedeepagents-code 0.1.19 added dual-write of agent traces to extra LangSmith projects.
View sourcelanggraph-cli 0.4.30 added support for compatible API version ranges.
View sourcePricing
$39/seat/mo
seats + usage
Included quota
Developer free tier
What is public
LangChain offers a Developer free tier, a Plus plan at $39/seat/month, and pay-as-you-go beyond that. OSS framework is freely self-hostable. LangSmith observability platform pricing is platform-centric.
Cost watchouts
LangSmith platform pricing is separate from OSS framework usage
Variable cost rationale
Pay-as-you-go usage beyond plan seats can materially increase cost.
Overage / add-ons
Pay-as-you-go beyond plan
Sales call required
No — self-serve available
Free / trial
Free (Developer tier)
Lowest paid plan
Plus $39/seat/mo
Key ambiguities
OSS framework is free; platform/hosted costs differ