AI patent litigation startup Stilta this week announced $10.5 million in funding led by Andreessen Horowitz, with participation from Y Combinator and a group of founders and operators from leading AI companies including Sana, Legora, OpenAI, Lovable and Listen Labs.
The vast majority of patents are never enforced, licensed, or monetised – not because the evidence doesn’t exist, but because the analysis required is complex and expensive.
Stilta has built agentic AI software to enforce, defend, and commercialise patents. Its agents reason across 180 million patents, 250 million scientific publications, and over a trillion archived web pages to surface evidence that legacy tools and manual review consistently miss.
Oskar Block, co-founder and CEO of Stilta, said “When one company starts using AI for patent enforcement, every competitor has to follow. That shift is happening right now. We built Stilta to be the platform IP teams reach for when the stakes are highest, and to make sure no invention worth protecting goes unprotected.”
Since launching in February 2026, Stilta has signed enterprises including Roche, Alfa Laval and Maersk – alongside three of the five largest IP firms globally, as customers or in active pilots.
Stilta will use the funding to hire its first employees — engineers, go-to-market, and patent experts across Stockholm and New York. The team will be the company’s first hires beyond the four founders, who left McKinsey’s AI practice to build Stilta.
For more information, visit stilta.com.
