LangChain, an artificial intelligence startup specializing in AI agent development and management, has raised $300 million in Series C funding at a $3 billion valuation. The round, announced on November 13, 2026, was led by Alphabet’s growth investment arm CapitalG, with participation from Singapore’s GIC, DFJ Growth, IVP, and Sapphire Ventures.
According to LangChain’s official announcement, the funding brings its total capital raised to approximately $460 million. The company’s valuation has more than doubled from $1.25 billion in October 2025, when it secured $125 million in a Series B round led by IVP.
LangChain Expands AI Agent Management Platform
Founded in 2022 by Harrison Chase, LangChain initially gained popularity through its open-source framework that helped developers connect large language models with external tools, databases, and APIs. The company subsequently expanded into AI agent management as developers began building increasingly complex autonomous applications.
Its primary commercial product, LangSmith, provides tools for developing, deploying, monitoring, and managing AI agents across different models and infrastructure environments. LangChain said the platform allows businesses to retain control over their AI systems without depending exclusively on a particular model provider or cloud service.
LangSmith includes three main components covering agent deployment, performance improvement, and governance. These tools allow organizations to monitor agent behavior, evaluate results, manage access to external systems, and establish controls over data usage and authentication.
The platform also supports automated error detection and improvements through LangSmith Engine, which analyzes agent performance and helps developers identify potential problems. LangChain said it plans to introduce additional LangSmith capabilities on November 20.
LangSmith Reaches More Than 7,000 Organizations
LangChain reported that more than 7,000 organizations currently use LangSmith, including Nvidia, Toyota, Salesforce, Harvey, Rippling, and Clay. The company said Clay uses its platform to monitor hundreds of millions of AI agent executions each month.
Workday also uses LangSmith to manage AI agents across its operations, with LangChain reporting that the platform helped reduce deployment time from five months to less than one day. The company’s customers span enterprise software, healthcare, financial services, and other sectors adopting autonomous AI systems.
New Funding Supports Product Development and Expansion
Additional investors in the Series C include Salesforce Ventures, Insight Venture Partners, QuantumLight, and MongoDB Ventures. Existing backers Sequoia Capital, Amplify Partners, and Benchmark also participated in the financing.
LangChain plans to use the funding to expand LangSmith’s capabilities and support its growing enterprise customer base. The company currently employs approximately 435 people and aims to increase its workforce to around 850 by the end of 2027, with hiring focused on engineering, research, sales, and customer-facing positions.
Featured image credits: Magnific.com
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