--- title: "Patronus AI raises $50M to stress-test AI agents" url: https://daily.dev/posts/patronus-ai-raises-50m-to-stress-test-ai-agents-gqtiafawg source_url: https://thenextweb.com/news/patronus-ai-50m-series-b-agent-simulation type: article source: "The Next Web" published: 2026-06-26T14:16:31.534Z updated: 2026-06-26T14:16:52.796Z tags: ["ai-agents", "reinforcement-learning"] reading_time: 6 upvotes: 0 comments: 0 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Patronus AI raises $50M to stress-test AI agents **[The Next Web](https://daily.dev/sources/tnw)** · 6 min read · 0 upvotes · 0 comments ## Summary Patronus AI has raised $50M in a Series B led by Greenfield Partners, bringing total funding to $70M. The company builds simulated digital environments called Digital World Models to stress-test AI agents before production deployment. Borrowing from Waymo's synthetic training approach, Patronus uses reinforcement learning inside replicas of websites and internal systems to catch agent shortcuts and failures. Revenue has grown fifteenfold in the past year, with virtually every frontier AI lab as a customer. Current simulated environments cover software engineering and finance, with plans to expand into harder-to-verify long-horizon tasks. The company positions itself against internal AI lab evaluation teams and human annotation firms, arguing its automated, scalable approach is superior. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Patronus AI lands $50M to build ‘digital worlds’ that stress-test AI agents](https://daily.dev/posts/patronus-ai-lands-50m-to-build-digital-worlds-that-stress-test-ai-agents-kt7ufe33b) · TechCrunch · 0 upvotes · 0 comments - [Patronus AI announces Generative Simulators to provide adaptive training environments to agents](https://daily.dev/posts/patronus-ai-announces-generative-simulators-to-provide-adaptive-training-environments-to-agents-ytldk5qql) · SD Times · 1 upvotes · 0 comments - [Bespoke Labs raises $40M to train reliable AI agents](https://daily.dev/posts/bespoke-labs-raises-40m-to-train-reliable-ai-agents-pcj1yr8du) · The Next Web · 1 upvotes · 0 comments --- Tags: [#ai-agents](https://daily.dev/tags/ai-agents), [#reinforcement-learning](https://daily.dev/tags/reinforcement-learning) [View this post on daily.dev](https://daily.dev/posts/patronus-ai-raises-50m-to-stress-test-ai-agents-gqtiafawg)