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LangChain

Information Technology Company

Address501 2nd St, San Francisco, CA 94107

Websitelangchain.com

LangChain enables every company to own their intelligence. Control, govern, and compound intelligence with an open agent engineering platform.

Prices

Item / service	Price	Source
LangSmith Plus plan	$39 / seat per month	website, 2026-10-14
LangSmith Standard Units (LSU) usage	$1 / LSU	website, 2026-10-14

Prices as published by the business on the date shown. Confirm with the business before buying.

Services

Developer
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Enterprise
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General Questions
LangSmith Observability & Evaluation Questions
LangSmith Deployment Questions
LangSmith Fleet Questions
LangSmith Engine Questions
LangSmith Sandboxes Questions
Key Takeaways
The Problem: Cross-Domain AI on a Massive Ontology
Rippling AI: Built On Deep Agents + LangSmith
Context Engineering: The Hardest Problem
Observability and Evals with LangSmith
Self-Healing Eval Loop
The Eval Pipeline
Related content
See what your agent is really doing
Tackling agent fragmentation
A multi-agent system for customer success workflows
Complex agent orchestration with LangGraph
Rigorous evaluation strategy with custom metrics
Testing and production roadmap
Conclusion

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Sources: Foursquare (Apache-2.0); business website read 2026-10-14. About our data.