LangChain, a company that makes software for building and managing artificial intelligence (AI) agents, said on 13 November 2026 that it has raised $300 million in a Series C round at a $3 billion valuation, according to a post by Harrison Chase on LangChain’s blog and a TechCrunch report. LangChain’s post says CapitalG, an existing investor, led the round. TechCrunch says the valuation is more than double the $1.25 billion set in LangChain’s previous round about a year earlier.

The round

  • Lead: CapitalG, which LangChain’s post calls an existing investor. TechCrunch also reports CapitalG as the lead.
  • Other investors, per LangChain: GIC and DFJ Growth are new investors, and IVP and Sapphire Ventures are existing investors. TechCrunch names the same four. LangChain’s post also welcomes Salesforce Ventures, Insight Venture Partners, QuantumLight and MongoDB Ventures, and thanks Sequoia, Amplify and Benchmark for investing again in this round.
  • Previous round: LangChain’s post of 20 October 2025 says it raised $125 million at a $1.25 billion valuation, led by IVP, with CapitalG and Sapphire Ventures as new investors at that time. $3 billion is 2.4 times $1.25 billion (Lens arithmetic).
  • Total raised: WOWTALE reports $460 million in total funding. LangChain’s post does not state a total.

Customers and product, as the company describes them

TechCrunch says LangChain began in 2022 as an open source project that handled tasks such as searching the web, calling application programming interfaces and working with databases, and that it has since turned its focus to managing AI agents. LangChain describes its product, LangSmith, as a platform to run, improve and govern agents, organized around three areas: agent runtime, agent improvement and agent governance.

LangChain says more than 7,000 organizations rely on LangSmith. It names Harvey, Rippling and Listen Labs among startups, and Nvidia, Toyota and Salesforce among large enterprises. TechCrunch describes the 7,000 figure as a company claim and also names Clay. LangChain adds that Clay uses LangSmith to monitor hundreds of millions of agent runs a month, and that Workday uses it to run and govern agents, cutting the time to deploy a new agent from five months to under a day. These are company figures, and Lens did not verify them. In the sources Lens read, Salesforce appears both as a named customer and, through Salesforce Ventures, as an investor.

What is not disclosed, and what comes next

Neither LangChain’s post nor TechCrunch gives revenue figures or says how the money will be used. LangChain’s post says the company will share several new LangSmith capabilities at a release event on Friday 20 November 2026. LangChain’s website lists a virtual event called “Future of Agents by LangChain” on 20 November.

Where reports differ

TechCrunch lists four investors alongside CapitalG, while LangChain’s post names those four plus seven more firms. TechCrunch does not say whether CapitalG was an existing investor; LangChain’s post and its 2025 announcement indicate it was.

Sources and notes

Sources: LangChain, “LangChain Raises $300M to Enable Every Company to Own Its Intelligence” (13 November 2026) and its earlier Series B post (20 October 2025); TechCrunch, Julie Bort’s report (13 November 2026); WOWTALE (14 November 2026). Lens read the LangChain Series C post and the TechCrunch article in full as text, read the opening of the Series B post, and read WOWTALE as article text. The $460 million total comes from WOWTALE only. Lens did not find Series C revenue, use-of-funds or employee figures in LangChain’s post or TechCrunch; one other site reports headcount figures that Lens did not confirm and does not use. As of 14 November 2026 the story is still developing.

Image: The downtown San Francisco skyline, with the Transamerica Pyramid and Salesforce Tower, seen from Ina Coolbrith Park, 15 July 2021. Photo: Frank Schulenburg (CC BY-SA 4.0), via Wikimedia Commons; cropped. Stand-in image: not a photo of LangChain or its offices.