Patronus AI
Evaluates LLMs and AI agents for accuracy and safety, and builds simulated worlds to test agents.
- Revenue
- Company says revenue grew more than 15 times in the past year. Not audited
- Value
- $50M Series B led by Greenfield Partners (Jun 2026). About $70M raised in total
- Growth
- Company says revenue up more than 15 times over the past year
- Listed
- Private
Company says it works with most frontier AI labs and several hyperscalers.
Its growth figure is company-reported, and the product is still young.
Money coming in
Who pays Patronus AI, and for what.
No customers of Patronus AI mapped yet.
Money going out
Who Patronus AI pays to do what it does.
No suppliers of Patronus AI 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 profileMakes LangChain, a popular framework for building AI apps, and LangSmith, its tracing and testing product.
LangSmith annual recurring revenue reported at $12M to $16M (TechCrunch, 2025). Not confirmed by the company
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 profileSources: vcaonline.com, raising.fi
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