LangChain (LangSmith)
Makes LangChain, a popular framework for building AI apps, and LangSmith, its tracing and testing product.
- Revenue
- LangSmith annual recurring revenue reported at $12M to $16M (TechCrunch, 2025). Not confirmed by the company
- Value
- $1.25B post-money after a $125M Series B led by IVP (Oct 2025)
- Growth
- $125M Series B (20 Oct 2025, CB Insights). Total funding $160M (CB Insights) or $260M (StartupHub), sources conflict
- Based in
- San Francisco, US
- Listed
- Private
Many developers already use the framework, so LangSmith is an easy add-on for tracing.
The company does not publish ARR, so the revenue figures are outside estimates.
Money coming in
Who pays LangChain (LangSmith), and for what.
No customers of LangChain (LangSmith) mapped yet.
Money going out
Who LangChain (LangSmith) pays to do what it does.
No suppliers of LangChain (LangSmith) mapped yet.
Where it sits on the map
Competitors and neighbours
Makes switches, routers and AI networking systems sold to cloud providers and enterprises.
About $4B of AI infrastructure revenue in fiscal 2026 (year to July 2026)
Open profileOpen-source tool for tracing and evaluating AI apps. Acquired by ClickHouse in January 2026.
Bought by ClickHouse (Jan 2026)
Open profileRuns a fast open-source database used for analytics. Bought Langfuse to add AI tracing to its stack.
Completed a $400M Series D alongside the Langfuse deal (Jan 2026). Valuation not in the source
Open profileTests AI models for hallucinations, errors and safety problems, and monitors them once they are live.
Total funding about $68M. Its $45M Series B was led by Scale Venture Partners (dated Oct 2024 by CB Insights)
Open profileMonitors AI models and agents in production, finding drift, errors and bad answers.
$70M Series C (2025)
Open profileTests and scores AI outputs, and traces each step of an AI app so teams can find and fix failures.
$80M at about $800M valuation (Feb 2026)
Open profileEvaluates LLMs and AI agents for accuracy and safety, and builds simulated worlds to test agents.
Company says revenue grew more than 15 times in the past year. Not audited
Open profileSells Microsoft 365 Copilot inside Office and Windows, and owns a large stake in OpenAI.
20M+ users (2025)
Open profileCRM company selling Agentforce, AI agents built into its customer software.
Agentforce ARR about $800M in the quarter to Jan 2026, up 169% year on year (company, Q4 FY26)
Open profileSources: valueaddvc.com, techcrunch.com, cbinsights.com, startuphub.ai
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