Stilta
Winter 2026 NewAgentic AI for intellectual property
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.
AI Investor Summary
Stilta is building agentic AI software to revolutionize intellectual property analysis, starting with patent litigation. Their exceptional founding team, with deep technical expertise from Google, Meta, and YC, is tackling a massive, underserved market ripe for AI-driven disruption. The product aims to provide source-backed, auditable analysis, addressing critical pain points for IP law firms and in-house teams.
Key Highlights
- ● Highly credentialed and experienced founding team with multiple prior YC stints and top-tier tech company backgrounds.
- ● Addresses a massive, manual, and underserved market (IP legal tech) with a technically sophisticated AI solution.
- ● Clear vision for product differentiation and user experience, aiming to bring modern AI capabilities to a traditional industry.
Risk Factors
- ● Adoption cycles in the legal industry can be slow and require significant trust-building.
- ● Defensibility of the AI models and data will be crucial as competitors emerge.
- ● Scaling agentic AI for complex, high-stakes legal analysis requires robust accuracy and auditability.
Founders
Oskar Block is a co-founder of Stilta, a Y Combinator startup focused on improving developer productivity. He has a strong background in software engineering and product development, with prior experience at prominent tech companies. His expertise lies in building scalable systems and user-centric products.
Oscar is CPO and co-founder of Stilta. Before Stilta, he built products at a unicorn, was a founder himself, and worked with 50+ CEOs at McKinsey to shape Sweden's innovation agenda. He has a background as a competitive mathematician, with degrees in business and AI from Chalmers and other top Swedish universities, plus coursework at UC Berkeley and Bocconi.
Tobias is co-founder of Stilta. Previously at QuantumBlack (McKinsey & Company), he led teams developing agentic AI systems for global clients. He is a second-time founder with a background in physics and machine learning from KTH and KU Leuven, bringing deep technical expertise and a track record of building AI systems for complex, high-stakes environments.
Petrus Werner is a co-founder of Stilta, a Y Combinator startup focused on improving developer productivity. His background includes significant experience in software engineering and product development, with a focus on building scalable and efficient systems. He has a strong academic foundation in computer science.
Score Breakdown
Exceptional technical depth and pedigree. Multiple founders with prior YC experience, strong backgrounds at Google, Meta, and Stripe, and advanced degrees from top institutions like Stanford and KTH. Oscar Adamsson's blend of product leadership, entrepreneurial experience, and consulting on innovation is a significant asset. Tobias Estreen's experience leading agentic AI teams at QuantumBlack is highly relevant. Petrus Werner's CTO role with a strong engineering background rounds out a very capable team. [Boost +1: Founder from Google; Founder from Google; Founder from Google; Founder from Google]
The IP legal tech market, particularly patent litigation, is a massive and underserved area ripe for disruption. The reliance on manual processes and disconnected tools presents a clear opportunity. While the TAM is substantial, the adoption cycle for legal tech can be long, and regulatory shifts, while potentially tailwinds for AI adoption, can also introduce complexities. The timing is good as AI capabilities mature and the legal industry becomes more open to technological solutions. [Boost +0.5: Hot sector: ai]
The concept of agentic AI for source-backed, auditable IP analysis is technically differentiated and addresses a core pain point. The comparison to 'Claude Code experience' for patent practitioners highlights a clear vision for UX and usability. The defensibility will come from the quality of the AI models, the data they are trained on, and the integration into legal workflows. The platform potential is significant if they can expand beyond patent litigation to other IP areas. Current UX quality is an unknown but the ambition is high.
As a Winter 2026 batch company, traction is expected to be nascent. The YC backing is a strong signal of early validation. The mention of 'Cursor for Patent Practitioners' suggests early product development and potential early user engagement or beta testing. However, concrete revenue, user numbers, or significant partnerships are not yet evident, which is typical for this stage. Investor interest is implied by YC acceptance.
News
Mannheimer Swartling has welcomed Stilta to its MSA Innovation Lab, a legal-tech incubator, to collaborate on developing next-generation legal services using AI for patent disputes.
Stilta offers agentic AI for patent attorneys that provides source-backed, auditable analysis, addressing the critical bottleneck of prior art research in patent law.
Stilta has been accepted into the Y Combinator Winter 2026 cohort, which is expected to accelerate its product development, AI capabilities, and scaling efforts.
Stilta is providing AI-driven infringement and validity analyses of US and European patents to a Scandinavian investment bank for music AI patent securitization, significantly reducing analysis time.
Stilta's AI tool achieved 72% petition recall in 21 minutes on a prior art benchmark using 40 instituted PTAB IPR decisions, outperforming traditional patent search tools and LLMs.
Stilta, an AI platform for patent analysis, ranked among the top 8 at Y Combinator's Winter 2026 Demo Day, highlighting its progress after a 12-week program.
Stilta, a Y Combinator Winter 2026 startup, has officially received backing from Y Combinator and is developing an AI-native workspace for IP teams.
Stilta has launched its AI-powered 'Cursor for patent practitioners' to improve end-to-end patent work, offering iterative analysis with source citations.
Stilta has launched its 'Cursor for patent practitioners' product, utilizing agentic AI to streamline manual research and analysis in patent law, aiming to help practitioners keep pace with innovation.
Stilta.com received an AEO Site Rank of 32/100, indicating minimal AI visibility, with key gaps in its llms.txt file, Schema.org structured data, and internal linking structure.
Stilta is developing agentic AI capabilities for patent infringement and invalidation research, offering secure, isolated Kubernetes environments for agents to combine core primitives with proprietary tooling and litigation playbooks.
Stilla, a company developing an intelligence layer for human-AI collaboration in product teams, has raised $5 million in pre-seed funding to address coordination challenges as organizations increasingly adopt AI.
Stilta has developed an agentic AI specifically for patent attorneys that provides source-backed, auditable analysis of prior art, addressing a significant bottleneck in the patent prosecution process.
Stilta develops agentic AI software for intellectual property, starting with patent litigation, providing source-backed, auditable analysis for IP law firms and in-house teams.
Stilta has raised a total of $500K in one Seed round on January 1, 2026, from Y Combinator.
Stilta is an AI-based patent analysis platform for law firms, founded in 2026 in Stockholm, Sweden, and has raised $500K in seed funding.
Stockholm-based startup Stilla has raised $5 million in pre-seed funding to develop a service layer that synchronizes AI agents and human teams by aggregating signals from common product tools into a shared context.
Stilta is building a "Cursor for patent practitioners," using agentic AI to streamline patent research and analysis, aiming to reduce manual work and improve the protection of innovation.
Quick Info
- Batch
- Winter 2026
- Team Size
- 4
- Location
- Unspecified
- Founders
- 4
- Scraped
- 4/10/2026