Tobias Estreen is Co-Founder and Chief Architect at Stilta, an AI-native software platform transforming how patent practitioners work. Stilta is part of Y Combinator's Winter 2026 batch and already serves paying customers across Europe and the US.

Tobias studied physics and machine learning at KTH Royal Institute of Technology and KU Leuven. He previously worked at McKinsey & Company and QuantumBlack, where he led teams building agentic AI systems for global clients.

Tobias brings deep technical expertise in AI systems architecture with a strong background in physics and ML. He is one of four co-founders who are all engineers from McKinsey and QuantumBlack.

Stilta raised $500K from Y Combinator as part of the Winter 2026 batch. The company is building AI-powered workflows that reduce manual patent work by up to 60% while maintaining legal-grade traceability.

Stilta addresses a critical gap in intellectual property tools, enabling patent teams to protect the world's most valuable innovations with AI that integrates trust and auditability into legal workflows. The platform is already live with paying customers in both Europe and the US.