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Semiotic

YC F25

San Francisco, US · Founded 2025 · 3 employees · 7 known investors

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Semiotic develops AI agents that automatically create landing pages for startups, addressing the gap between poor-quality automated website builders and expensive agency services.

Also known as Mooodboard Inc. · Mooodboard

Developer ToolsEnterprise SoftwareUnited States of AmericaAmerica / Canada

Founders & leadership· Y Combinator alumni (F25)

Semiotic was founded in 2025 by Michael Roberson, Bryan Grisales, and Brandon Yao.

MRMichael Roberson
Michael RobersonCo-Founder and CEOMichael Roberson studied computer science and cognitive science at Columbia before founding a design studio and serving in UX and brand design roles at Amazon and Landor respectively. He is currently CEO of Semiotic.
BGBryan Grisales
Bryan GrisalesCofounder and CTOBryan Grisales is CTO at Semiotic, with a background in computer science and mathematics from Columbia University and prior AI research experience at Columbia's Computational Design Lab.
BYBrandon Yao
Brandon YaoCo-Founder & COOBrandon Yao studied computer science and economics at Columbia. He has conducted research with OpenAI's chief economist and held roles at several YC-backed startups, and now serves as COO at Semiotic.

Investors · 7

Acacia Venture Capital Partnersreported

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Capitalize VCreportedChicago · $100K – $200K

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CRV (Charles River Ventures)reportedBay Area · $250K – $5M

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Leonis CapitalreportedSan Francisco

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Madrona Venture GroupreportedSeattle · $2M – $10M

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Peterson Venture PartnersreportedSalt Lake City · $5M – $25M

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Related companies · 2

BlockworksBlockworks operates a platform for onchain capital markets, connecting investors and businesses and providing data, research, and information to help investors underwrite crypto assets. It also produces market and crypto research and media content such as its "The Breakdown" series.
Symbiotic SecuritySymbiotic Flow is a security tool designed to fit into developers' workflows without slowing them down, aiming to reduce the friction that causes security steps to be skipped and risk to accumulate in code. It targets software development teams in the application security space.

Companies working in the same space as Semiotic.

Legal entities · 1

corporate structure
Mooodboard Inc.

In the news

Semiotic: AI Design Firmycombinator.com · Nov 2025

Frequently asked questions

What does Semiotic do?
Semiotic develops AI agents that automatically create landing pages for startups, addressing the gap between poor-quality automated website builders and expensive agency services.
Who founded Semiotic?
Semiotic was founded by Michael Roberson, Bryan Grisales, Brandon Yao in 2025.
Who are Semiotic's investors?
Semiotic's investors include Y Combinator, Acacia Venture Capital Partners, Capitalize VC, CRV (Charles River Ventures), Leonis Capital, Madrona Venture Group, Peterson Venture Partners.
Where is Semiotic headquartered?
Semiotic is headquartered in San Francisco, US.