Petrus Werner is Co-Founder and CTO at Stilta, an AI-native software platform for patent practitioners backed by Y Combinator (W26).

Petrus worked at QuantumBlack (McKinsey & Company) and Amazon Web Services, building and deploying scalable AI systems for large organizations.

Petrus is one of four engineers from McKinsey/QuantumBlack who co-founded Stilta, bringing deep technical expertise in AI and machine learning to transform intellectual property workflows.

Stilta is already live with paying customers in both Europe and the US, helping patent teams reduce manual work by up to 50% while enabling new revenue streams.

The company raised $500K from Y Combinator and has built AI-powered tools that automate patent research, drafting, and portfolio review with traceable, source-backed outputs for legal-grade workflows.