The latest legal AI startup from Stockholm is coming for patent lawyers

Stockholm’s legal AI boom has produced another startup - Stilta has raised $10.5 million to bring AI to patent litigation.

The round was led by Andreessen Horowitz, with backing from Y Combinator and a group of founders and operators from AI companies including Sana, Legora, OpenAI and Lovable.

Founded only this year by four former McKinsey consultants and AI data scientists, Stilta is building AI systems designed to help companies enforce and defend patents.

The startup says its technology can analyse huge volumes of patent, scientific and web data to surface infringement risks and licensing opportunities that would traditionally require large amounts of manual legal work.

Stilta said its AI 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.”

Customers already include companies such as Roche and Maersk, alongside three of the five largest IP law firms globally either as clients or pilot users.

Chief executive Oskar Block said the broader patent market was entering an AI arms race.

“When one company starts using AI for patent enforcement, every competitor has to follow,” he said. “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."

The funding will be used to hire engineers, patent specialists and go-to-market staff across Stockholm and New York.

Stockholm’s AI moment

The raise adds to a growing wave of AI companies emerging from Stockholm.

Legal AI frontrunner Legora - most recently valued at nearly $6 billion - was founded in the city in 2024, while fast-growing coding startup Lovable also emerged from Stockholm’s tech scene. In April, Legora acquired fellow Stockholm-based startup Qura to strengthen its legal research capabilities.