What is LangChain?
Open-source framework and commercial platform for building LLM apps and agents.
- Category
- LLM application development platform
- Headquarters
- San Francisco, CA
- Founded
- 2022
- Employees
- ~100-200
- Total funding
- ~$35M disclosed
- Valuation
- At least ~$200M reported in 2023; current valuation undisclosed
What is LangChain?
Open-source framework and commercial platform for building LLM apps and agents.
LangChain is a llm application development platform company headquartered in San Francisco, CA. LangChain open-source framework, LangSmith observability and evaluation, LangGraph for stateful agents, LangGraph Platform, LangServe, templates, tracing, testing, and deployment workflows. LangChain does not publish ARR. Its open-source framework became one of the most widely used LLM application libraries, while the company monetizes LangSmith observability/evaluation and LangGraph Platform for deploying stateful agents.
As of June 2026, the company is best understood by its wedge: LangChain, LangSmith, LangGraph. Its market position is shaped by fast AI adoption, high compute needs, and enterprise buyers that increasingly want measurable productivity rather than generic AI demos. Sellers should treat the published numbers as directional when the company has not disclosed audited revenue, and should anchor outreach in the specific product line or buyer team that maps to the use case.
What does LangChain offer?
LangChain offers LangChain, LangSmith, LangGraph, LangGraph Platform and related enterprise capabilities.
- LangChain· Open-source framework
- LangSmith· Observability and evals
- LangGraph· Agent framework
- LangGraph Platform· Deployment
- LangServe· API serving
- Templates· Developer tooling
How does LangChain make money?
LangChain makes money through software, usage, and enterprise contracts.
LangSmith publishes developer/free usage, Plus-style paid usage for teams, and enterprise contracts; pricing is driven by seats, traces, evaluation runs, retention, deployment, and support. LangChain open source remains free under its licenses. Growth is driven by adoption of the core workflow, expansion to teams and enterprises, and usage intensity as AI features move from pilots into production.
The practical unit economics depend on compute, support, and integration depth. Self-serve products monetize through monthly subscriptions and usage; enterprise products monetize through annual contracts, security controls, data integrations, and support. For sellers, the budget owner usually sits where the tool changes labor cost: engineering, legal, support, creative operations, or knowledge-work productivity.
Who leads LangChain?
LangChain is led by Harrison Chase (Co-founder and CEO) and Ankush Gola (Co-founder).
- Harrison ChaseCo-founder and CEOsince 2022Created LangChain as an open-source project before incorporating the company.
- Ankush GolaCo-founderpublicly listedCo-founder focused on engineering and product.
- Nuno CamposFounding engineer / product leaderpublicly associatedLeader associated with LangGraph and product development.
How do you contact LangChain's leadership?
LangChain does not publish verified personal leadership emails broadly. The contacts below use the format first@langchain.dev (format-following; verify before outreach); verify any personal address before outreach and prefer official contact forms or published aliases for press and partnerships.
first@langchain.dev (format-following; verify before outreach)How much funding has LangChain raised?
LangChain has raised ~$35M disclosed; the latest reported valuation/status is At least ~$200M reported in 2023; current valuation undisclosed.
Major disclosed funding events: Apr 2023: Seed - $10M. Benchmark led the seed round. Apr 2023: Series A - $20M+ at at least $200M valuation. Sequoia led a round shortly after the seed. Feb 2024: Series A extension / announced financing - $25M. Sequoia led alongside the LangSmith GA announcement.
The valuation path matters because it signals both buying power and operating pressure. Companies with recent large rounds usually have budget for hiring, infrastructure, security, GTM, and finance systems, but they also professionalize procurement quickly. Where the latest valuation or amount is undisclosed, the profile names the round as reported rather than back-solving a number.
How did LangChain get here?
LangChain's path runs from founding in 2022 to its current llm application development platform position in June 2026.
- Oct 2022LangChain open source launchedHarrison Chase released the LLM application framework.
- Apr 2023Company incorporated and fundedBenchmark and Sequoia backed the startup.
- Aug 2023LCEL introducedLangChain added a declarative chain expression layer.
- Oct 2023LangServe introducedThe team shipped deployment tooling for LangChain apps.
- Feb 2024LangSmith GALangSmith launched commercially with a Sequoia-led financing announcement.
- May 2025LangGraph Platform GALangChain launched managed infrastructure for long-running stateful agents.
Who are LangChain's competitors?
LangChain competes with LlamaIndex, Haystack, Vercel AI SDK, Humanloop and other AI-native workflow vendors.
LangChain — frequently asked questions
