AI patent platform Stilta completes $10.5 million seed round funding, led by a16z

On May 20, AI patent startup Stilta announced that it has completed a seed round of $10.5 million, led by Andreessen Horowitz, with participation from Y Combinator and individual investors from companies including OpenAI, Legora, Sana, Lovable, and Listen Labs.
The new funding will be mainly used to hire engineers, patent experts, and marketing teams. The company plans to expand its team to about 10 people within the next 3 to 6 months, and plans to set up an office in New York by the end of this year or in early 2027.
Stilta is focused on AI Agent-driven patent management software, mainly for scenarios such as patent infringement detection, uncovering opportunities for patent licensing, and defense in patent litigation. Its platform can analyze hundreds of millions of patents, scientific papers, and historical web data to help enterprises and law firms manage patent assets.
The company was founded this year by former McKinsey members Oskar Block, Petrus Werner, Tobias Estreen, and Oscar Adamsson, and was selected for the YC2026 winter incubation program. At present, about two-thirds of its customers come from the corporate sector, with the remaining portion from law firms.
As introduced, Stilta is developing hundreds of AI Agents to carry out different tasks such as infringement analysis and patent invalidity analysis, with tailored adjustments for highly specialized fields such as pharmaceuticals. In recent years, a16z and YC have continued to increase their investment in the legal technology sector. Previously, a16z had already invested in multiple rounds in the AI legal assistant Harvey; more recently, YC has also invested in legal AI companies such as Legora, Point One, and Parlai.
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