About
Per Wikipedia (secondary), LangChain began in 2022 as an open-source project by Harrison Chase and was incorporated in 2023; Chase is CEO. It positions itself as “the platform for agent engineering” (company Series B post, 2025-10-20).
Products
- LangChain open-source framework (1.0 release in October 2025, per the vendor’s blog; exact date not verified)
- LangGraph: stateful multi-agent framework (1.0 in Oct 2025); LangGraph Platform general availability in 2025 (date not verified)
- LangSmith: observability, evals and deployment, with an Insights Agent (vendor-announced; dates not verified)
- Agent Builder: no-code text-to-agent builder, described as private preview in the 2025-10-20 vendor post (current status not verified)
- See also agent-evals-and-observability.
Funding timeline
- 2023: reportedly a USD 10M seed (Benchmark) and a Series A led by Sequoia (Wikipedia, secondary; not verified)
- 2025-10-20: USD 125M Series B led by IVP at USD 1.25B valuation; also Sequoia, Benchmark, Amplify, CapitalG, Sapphire Ventures (company blog, primary)
- Vendor-stated traction at that date (self-claims): 90M monthly downloads (LangChain + LangGraph) and use at 35% of the Fortune 500.
Open items
- 2026 developments (new products, funding) not checked.
Sources
- https://www.langchain.com/blog/series-b (primary, fetched 2026-10-05)
- https://en.wikipedia.org/wiki/LangChain (secondary, fetched 2026-10-05)