# Stilta

> Stilta is a Stockholm-based, Y Combinator (W26) startup building agentic AI for high-stakes patent work. Its platform runs invalidity, infringement, and freedom-to-operate analyses in minutes by deploying networks of AI agents across roughly 180 million patents, 250 million scientific publications, and more than a trillion archived web pages, returning source-backed, auditable claim charts rather than static reports. Founded in December 2025 by four former McKinsey and QuantumBlack engineers, Stilta raised a $10.5M seed led by Andreessen Horowitz and is used by IP firms and in-house teams at large enterprises.

- **Founded:** 2025
- **Headquarters:** Stockholm, Sweden
- **Founders:** Oskar Block (CEO & Co-Founder), Oscar Adamsson (Chief Product Officer & Co-Founder), Petrus Werner (CTO & Co-Founder), Tobias Estreen (Co-Founder)
- **Team size:** 4-8
- **Products:** Invalidity Analysis, Infringement Analysis, Freedom to Operate (FTO), Portfolio Analysis & Monitoring
- **Notable:** Raised a $10.5M seed led by Andreessen Horowitz just months after launching in late 2025., Co-investment from both Y Combinator and a16z, a signal of confidence in the patent-intelligence category., Signed IP firms and enterprises including Roche, Maersk, and Alfa Laval, plus three of the world's five largest IP firms.

## Products & services

- **Invalidity Analysis** — Deploys AI agents to search across ~180M patents, ~250M scientific publications, and over a trillion archived web pages to surface prior art and challenge patent validity, returning claim charts with color-coded strength assessments and pinpointed citations.
- **Infringement Analysis** — Maps a target patent's claims against products or competing patents to identify potential infringement and build litigation-grade claim charts with traceable evidence.
- **Freedom to Operate (FTO)** — Runs FTO assessments to help teams understand whether a product or technology risks infringing existing patents before going to market.
- **Portfolio Analysis & Monitoring** — Analyzes existing patent portfolios to surface licensing opportunities and rediscover under-used assets, with ongoing infringement monitoring.

## Achievements

- Raised a $10.5M seed led by Andreessen Horowitz just months after launching in late 2025.
- Co-investment from both Y Combinator and a16z, a signal of confidence in the patent-intelligence category.
- Signed IP firms and enterprises including Roche, Maersk, and Alfa Laval, plus three of the world's five largest IP firms.
- Internal benchmarks showing roughly 3x recall improvement over general-purpose models like ChatGPT, Claude, and Perplexity on prior-art search.
- Demonstrated identifying 868 prior-art references against a wireless-networking patent in about 30 minutes.

## Latest updates

- **2026-05** — Announced a $10.5M seed round led by Andreessen Horowitz, with participation from Y Combinator and operators from Sana, Legora, Lovable, OpenAI, and Listen Labs.
- **2026-01** — Participated in Y Combinator's Winter 2026 (W26) batch.
- **2025-12** — Founded in Stockholm by four former McKinsey and QuantumBlack engineers.

## Links

- Website: https://stilta.com
- LinkedIn: https://www.linkedin.com/company/stilta
- Twitter/X: https://twitter.com/oskarblock

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Profile page: https://yespress.io/stilta-yc-w26
Published by YesPress — https://yespress.io
Last updated: 2026-07-30