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14,448 startups · 29 programs

Stilta

Active · Agentic AI for intellectual property

WebsiteYC profile

Why it ranks

How the rank works
10signal of 100 · rising 10
  • went through YCProgram · this site+4
  • team of 4Team size · YC's directory+3.6
  • hiringHiring · Titles (titles.fru.dev), YC+2

A sum of public facts, not a judgement and not investment advice.

Competitors

AILegit PatentsShared: intellectual propertySeedcamp 2016Startup →AIReformShared: stake work, high stake, manualYC W24San FranciscoStartup →AITradespaceShared: intellectual property500 Global GA 25United StatesStartup →AICognition IPShared: intellectual property, patent, innovationYC W18San FranciscoStartup →AIInactiveAbelShared: document review, litigation, attorneyYC W24San FranciscoStartup →
Companies closest to Stilta
Company
Legit PatentsShared: intellectual propertySeedcamp 2016Not statedAI
ReformShared: stake work, high stake, manualYC W24ActiveAI
TradespaceShared: intellectual property500 Global GA 25Not statedAI
Cognition IPShared: intellectual property, patent, innovationYC W18ActiveAI
AbelShared: document review, litigation, attorneyYC W24InactiveAI

Adjacent

OtherBaloShared: intellectual propertyAntler 2024AustraliaStartup →OtherIdeal IDXShared: intellectual property500 Global GA 34United StatesStartup →AILexiShared: document review, audit trail, draftingYC F25San FranciscoStartup →AIContellerShared: intellectual property, traceability500 Global 2023MexicoStartup →AIForeQast.aiShared: high stakeAlchemist Class 37BostonStartup →
Companies next to Stilta
Company
BaloShared: intellectual propertyAntler 2024Not statedOther
Ideal IDXShared: intellectual property500 Global GA 34Not statedOther
LexiShared: document review, audit trail, draftingYC F25ActiveAI
ContellerShared: intellectual property, traceability500 Global 2023Not statedAI
ForeQast.aiShared: high stakeAlchemist Class 37Not statedAI

Also from W26 in AI

All of W26
AI/dev/fast/dev/fast is the AI-native code forgeYC W26San FranciscoStartup →AI10x ScienceThe AI-native platform for next-generation protein characterization.YC W26San FranciscoStartup →AI21stUI building blocks for the agentic internetYC W26San FranciscoStartup →AIAemonThe Forward-Deployed AI Research EngineerYC W26San FranciscoStartup →AIAgentic FabriqThe control plane for AI agents.YC W26San FranciscoStartup →AIAlt-XBuilding the best venue for private markets exposure.YC W26Los AngelesStartup →
Company
/dev/fast/dev/fast is the AI-native code forgeteam of 4ActiveAI, Devtools
10x ScienceThe AI-native platform for next-generation protein characterization.team of 5hiringActiveAI
21stUI building blocks for the agentic internetteam of 3ActiveAI, Devtools
AemonThe Forward-Deployed AI Research Engineerteam of 3hiringActiveAI, Devtools
Agentic FabriqThe control plane for AI agents.team of 2ActiveAI
Alt-XBuilding the best venue for private markets exposure.team of 2ActiveAI, Data

Founders

  • Oskar BlockFounder/CEO
  • Oscar AdamssonFounder/CPO
  • Tobias EstreenFounder
  • Petrus WernerFounder/CTO

About Stilta

Stilta builds agentic AI software for intellectual property, starting with patent litigation. Whether challenging or enforcing a patent, leading IP law firms and in-house IP teams use Stilta for source-backed, auditable analysis. Innovation drives the world's most important breakthroughs, but the tools that protect it haven't kept pace. Patent attorneys do high-stakes work with a process still built on manual document review and disconnected point solutions. Generative AI helps with drafting, but it doesn't deliver the trust and transparency that legal-grade work demands - no sources, no traceability, no audit trail. Stilta takes a different approach. We use agentic AI to run search and analysis at a scale manual methods can't match, with every output source-backed, referenced, and auditable. Until recently, this wasn't technically possible. We're four engineers from McKinsey/QuantumBlack who built and deployed AI systems at some of the world's largest organizations. With Stilta, we're equipping the people who protect the world's most valuable ideas with tools that match the stakes.

YC batch
W26 · Winter 2026
Status, per YC
Active
Category
AI
Team size
4
Location
Stockholm, Stockholm County, Sweden
Founded
2026
Checked
6h ago

Stilta in W26: 199 companies, 81% AI

LinkedIn

Stilta: questions

Which YC batch was Stilta in?

Stilta was in Y Combinator's Winter 2026 batch (W26).

Is Stilta still active?

Y Combinator lists Stilta as active.

Who founded Stilta?

Stilta's founders, as listed on its YC page: Oskar Block (Founder/CEO), Oscar Adamsson (Founder/CPO), Tobias Estreen (Founder), Petrus Werner (Founder/CTO).

Where is Stilta based?

Stilta lists Stockholm, Stockholm County, Sweden as its location on YC's directory.