Stilta Raises $10.5 Million to Bring Agentic AI to Patent Litigation and Intelligence

Stilta, Agentic AI for high-stakes patent work, led by Oskar Block, Petrus Werner, Tobias Estreen, and Oscar Adamsson, has raised $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.

Patents are a highly underleveraged asset class in business. While over 90% of S&P 500 value is intangible, most patents are never enforced, licensed, or monetized due to the complexity and cost of analysis, rather than a lack of evidence.

Stilta builds agentic AI software to enforce, defend, and commercialize patents by analyzing 180 million patents, 250 million scientific publications, and over a trillion archived web pages to surface overlooked evidence.

The platform helps companies defend against patent claims, identify commercialization opportunities, and uncover hidden portfolio value, with all findings traceable to source documents.

“When one company starts using AI for patent enforcement, every competitor has to follow,” said Oskar Block, co-founder and CEO of Stilta. “We built Stilta as the platform IP teams turn to when the stakes are highest, ensuring no invention worth protecting goes unprotected.”

Since launching in February 2026, Stilta has signed enterprises including Roche, Alfa Laval, and Maersk, along with three of the world’s five largest IP firms as customers or active pilots.

“When you can analyze more than 10x more patents to identify critical commercialization risks, you don’t just gain efficiency, you make better decisions,” said Joakim Hernström, CEO at Bergenstråhle & Partners. “Our attorneys can focus on partnering with clients on what matters most, backed by high-quality FTO assessments that protect them from costly infringement risks.”

Stilta will use the funding to hire its first employees across engineering, go-to-market, and patent expertise roles in Stockholm and New York.

These hires will expand the team beyond its four founders, who previously worked in McKinsey’s AI practice before founding the company.

“Patent litigation relies on labor-intensive workflows that have not meaningfully changed in decades,” said David Haber, General Partner at Andreessen Horowitz. “Stilta automates these processes, becoming a system of record for how enterprises protect and monetize their most valuable intangible assets.”