Patronus AI announced it raised a $50 million Series B round and unveiled Digital World Models, a new class of large-scale simulation environments for AI agent training and evaluation. The round was led by Greenfield Partners and included participation from existing investors Notable Capital, Lightspeed Venture Partners, Datadog, Samsung, Factorial Capital, Gokul Rajaram, and other AI and software executives. The new funding brings Patronus AI’s total capital raised to $70 million. The company plans to use the funding to expand its research organization, grow its engineering team, and invest in the compute and infrastructure needed to train and run Digital World Models at scale. Patronus AI said its revenue has grown more than 15x over the past year. The company was founded by AI researchers and engineers with backgrounds at organizations including Meta AI, Amazon AGI, and Google. Patronus AI said the next phase of AI development requires moving beyond static benchmarks, and Digital World Models are designed to support training and evaluation across complex digital workflows. The company’s long-term vision is to build systems that can supervise, evaluate, and govern increasingly autonomous agents at scale before failures occur in production environments.