Stilta is an agentic AI platform that runs patent invalidity, infringement, and freedom-to-operate analyses for IP litigators and corporate IP teams. A user drops in a patent number and the system dispatches a swarm of AI agents to look for prior art across what the company describes as 180 million patents, 250 million scientific publications, and more than a trillion archived web pages, the latter via an integration with the Internet Archive's Wayback Machine. The agents also pull prosecution history from the USPTO. Outputs are returned as a claim chart that maps each reference against the claim limitations and color-codes the strength of each read , with lawyers able to drill into source text and prompt agents to dig deeper on specific limitations.
The launch is anchored by a $10.5M seed round led by Andreessen Horowitz, with participation from Y Combinator and operators from Sana, Legora, OpenAI, Lovable and Listen Labs . Stockholm-based Stilta was founded in December 2025 by four former McKinsey engineers , CEO Oskar Block along with Tobias Estreen, Petrus Werner, and Oscar Adamsson, and the round is the company's first outside funding. David Haber, the Andreessen general partner who has led other recent legal tech bets for the firm, including the AI-for-plaintiffs platform Eve, led the round .
The timing matters because patent litigation is one of the few legal workflows where a single missed reference can swing a verdict worth hundreds of millions, and the volume of potentially relevant prior art has outgrown what any human team can review. Stilta formally launched its product in February and counts Roche, Alfa Laval, and Maersk among its enterprise customers, and says it has signed three of the world's five largest IP firms as either customers or active pilots. Roughly two-thirds of customers are corporate in-house IP teams across pharma, industrials, and high-tech, with the rest litigation-focused law firms split about evenly between the U.S. and Europe. The new capital will fund the company's first hires beyond the founders, with engineering and go-to-market roles in Stockholm and plans for a New York office by year's end.
Comments (10)
Sign in to join the discussion.
P
Priya KulkarniMay 19, 2026
From sports betting to patents is the most chaotic founder pivot I've seen this month, and somehow it tracks. Both are basically pricing risk under uncertainty.
T
Tobi EzenwaMay 19, 2026
The tweet buries the lede. 'Used at AmLaw 100 firms' should have been the hook, not paragraph two.
D
Deepa R.May 19, 2026
Demo video had like four cuts in the first six seconds and I still don't know what the product looks like. Show the actual screen, not the founder's hands.
M
Marco DuarteMay 19, 2026
Tagline rewrite, no charge: 'Patent work at the speed of the invention itself.' You're welcome.
Y
yukiMay 19, 2026
How are you handling claim construction edge cases where the spec contradicts the claims? Curious if the agent flags it or silently picks a side.
L
Lukas BrandtMay 19, 2026
Every patent tool demo I've seen lives or dies on prior art search recall. Anyone benchmarked this against a known invalidity case yet?
A
Amara OkaforMay 19, 2026
'High-stakes' is doing some heavy lifting here. Either everything is high-stakes or you mean litigation specifically, pick a lane.
R
Rohan MehtaMay 19, 2026
Swedish founder, American law firms, agentic AI buzzword in the tagline. This tweet was engineered in a lab.
F
Felicia BauerMay 19, 2026
Genuinely curious what retention looks like at these firms after the novelty wears off. Patent attorneys are notoriously hard to switch off Word and PowerPoint.
K
kenjiMay 19, 2026
Counterpoint: most AmLaw partners will use this for two weeks then quietly go back to having a senior associate do it at 2am.
Work With Us
Book an intro call to explore our suite of services. We might have a waitlist.
Stilta
Agentic AI for high-stakes patent work
Agentic AI for high-stakes patent work
Tags
TLVC Rating
Community Rating
No ratings yet
to rate this launch.
Stilta is an agentic AI platform that runs patent invalidity, infringement, and freedom-to-operate analyses for IP litigators and corporate IP teams. A user drops in a patent number and the system dispatches a swarm of AI agents to look for prior art across what the company describes as 180 million patents, 250 million scientific publications, and more than a trillion archived web pages, the latter via an integration with the Internet Archive's Wayback Machine. The agents also pull prosecution history from the USPTO. Outputs are returned as a claim chart that maps each reference against the claim limitations and color-codes the strength of each read , with lawyers able to drill into source text and prompt agents to dig deeper on specific limitations. The launch is anchored by a $10.5M seed round led by Andreessen Horowitz, with participation from Y Combinator and operators from Sana, Legora, OpenAI, Lovable and Listen Labs . Stockholm-based Stilta was founded in December 2025 by four former McKinsey engineers , CEO Oskar Block along with Tobias Estreen, Petrus Werner, and Oscar Adamsson, and the round is the company's first outside funding. David Haber, the Andreessen general partner who has led other recent legal tech bets for the firm, including the AI-for-plaintiffs platform Eve, led the round . The timing matters because patent litigation is one of the few legal workflows where a single missed reference can swing a verdict worth hundreds of millions, and the volume of potentially relevant prior art has outgrown what any human team can review. Stilta formally launched its product in February and counts Roche, Alfa Laval, and Maersk among its enterprise customers, and says it has signed three of the world's five largest IP firms as either customers or active pilots. Roughly two-thirds of customers are corporate in-house IP teams across pharma, industrials, and high-tech, with the rest litigation-focused law firms split about evenly between the U.S. and Europe. The new capital will fund the company's first hires beyond the founders, with engineering and go-to-market roles in Stockholm and plans for a New York office by year's end.
Comments (10)
From sports betting to patents is the most chaotic founder pivot I've seen this month, and somehow it tracks. Both are basically pricing risk under uncertainty.
The tweet buries the lede. 'Used at AmLaw 100 firms' should have been the hook, not paragraph two.
Demo video had like four cuts in the first six seconds and I still don't know what the product looks like. Show the actual screen, not the founder's hands.
Tagline rewrite, no charge: 'Patent work at the speed of the invention itself.' You're welcome.
How are you handling claim construction edge cases where the spec contradicts the claims? Curious if the agent flags it or silently picks a side.
Every patent tool demo I've seen lives or dies on prior art search recall. Anyone benchmarked this against a known invalidity case yet?
'High-stakes' is doing some heavy lifting here. Either everything is high-stakes or you mean litigation specifically, pick a lane.
Swedish founder, American law firms, agentic AI buzzword in the tagline. This tweet was engineered in a lab.
Genuinely curious what retention looks like at these firms after the novelty wears off. Patent attorneys are notoriously hard to switch off Word and PowerPoint.
Counterpoint: most AmLaw partners will use this for two weeks then quietly go back to having a senior associate do it at 2am.