LangChain
Framework and platform for building LLM applications, and the maker of LangSmith.
Also trades as LangSmith, LangGraph
About LangChain
LangChain is a software framework that helps facilitate the integration of large language models (LLMs) into applications. It provides open source frameworks and an agent engineering platform for teams building agents. Its commercial product is LangSmith, a platform for observing, evaluating, and deploying agents. Its open source stack consists of Deep Agents, LangChain, and LangGraph.
Chase and co-founder Ankush Gola started the company in early 2023.
In April 2023 the company incorporated and raised over $20 million in funding from Sequoia Capital, a week after announcing a $10 million seed investment from Benchmark. LangSmith was released in February 2024 as a closed-source observability and evaluation platform for LLM applications.
Drafted from en.wikipedia.org · not yet confirmed by LangChain
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Recently
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How Snyk Turned an Internal Support Agent into a Customer FeatureFrom their feed
Discover how Snyk transformed an internal support agent into Snyk Assist, a customer-facing AI feature powered by LangChain, LangGraph, and LangSmith.
October 9, 2026
Agents that can pay: building Restock with Stripe's Link and Managed Deep AgentsFrom their feed
Build an agent that pays for real purchases. Restock runs in Slack on Managed Deep Agents and pays with Stripe's Link over the Machine Payments Protocol.
October 8, 2026
Revamping Skills in Deep AgentsFrom their feed
Deep Agents now lets you bind tools to skills, pin skills at runtime, and reload skills mid-thread, so agents with expansive skill repositories stay context-efficient and effective.
October 8, 2026
Introducing LangSmith Fine-TuningFrom their feed
LangChain introduces LangSmith Fine-Tuning and SmithTune, a CLI built for post-training models. Train specialized models without building data pipelines by hand.
October 8, 2026
Managed Deep Agents delivers a better user experience for agents in productionFrom their feed
Managed Deep Agents is the simplest way to build, deploy, and run agents in production. The 0.8 release adds support for user-owned credentials, user-level memory, HTTP channels, file transfer in Slack and a pre-built tool for web search.
October 8, 2026