Patronus AI Raises $50M Series B

Patronus AI, based in San Francisco, an AI evaluation and simulation infrastructure, has raised $50 million in a Series B funding round, bringing its total capital raised to $70 million. The company specializes in building simulation environments and reliability infrastructure for frontier AI systems.

Investors

The funding round was led by Greenfield Partners. Participation also included Notable Capital, Lightspeed Venture Partners, Datadog, Samsung, Factorial Capital, Gokul Rajaram, and various leading AI and software executives.

Patronus AI Use of Funds

Patronus AI plans to use the new capital to expand its research organization, increase the size of its engineering team, and invest in the compute and infrastructure required to develop and operate its Digital World Models at scale.

About Patronus AI

Founded in 2023 by former Meta AI researchers Anand Kannappan and Rebecca Qian, Patronus AI is dedicated to building simulation and evaluation infrastructure. The company develops large-scale simulation environments and reliability tools that enable engineering teams to train, evaluate, and deploy trustworthy autonomous AI systems.

Funding Details

Company Website: https://patronus.ai

Company: Patronus AI
Raised: $50M
Round: Series B
Funding Date: June 25, 2026
Lead Investor: Greenfield Partners
Additional Investors: Notable Capital, Lightspeed Venture Partners, Datadog, Samsung, Factorial Capital, Gokul Rajaram
Company Website: https://www.patronus.ai
Software Category: Artificial Intelligence
Source: https://www.prnewswire.com/news-releases/patronus-ai-raises-50-million-series-b-and-unveils-first-digital-world-models-for-ai-agent-training-and-simulation-302811248.html