About
Bryan 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.
Founder at SemioticYC F25
Intro paths
YC
Bryan went through Y Combinator (Fall 2025) — any YC alum in your network can reach them through the YC community.
GP
Their group partner at YC was David Lieb, General Partner at Y Combinator — the partner who ran Semiotic's batch and knows the company first-hand. YC profile ↗
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In turn, Bryan can intro founders to Semiotic's investors below.
Semiotic's investors · 2
Co-founders at Semiotic
MR
Michael RobersonFounder
BY
Brandon YaoFounder
Experience
- Semiotic (YC F25)Cofounder and CTOcurrent2025 — presentSan Francisco
- Columbia University Department of Computer ScienceResearch Assistant2025New York, New York, United States
Frequently asked questions
- Who is Bryan Grisales?
- Bryan 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.
- Where does Bryan Grisales work?
- Bryan Grisales is Founder of Semiotic.
- What companies did Bryan Grisales found?
- Bryan Grisales founded Semiotic.
- Where did Bryan Grisales go to school?
- Bryan Grisales studied at Columbia University (Computer Science); Y Combinator.
Founder mafias
Y Combinator mafia8,773
Also came through, then founded or led a company.
Sam AltmanPresidentFounded Tools for Humanity +3Jessica LivingstonCo-founderFounded Y CombinatorAlexis OhanianYC Summer 2005Founded RedditFred EhrsamYC Summer 2012Founded Nudge +1Matt HuangYC Winter 2011Founded HotspotsTrae StephensYC Winter 2022Founded Pursuit +1
+ 8,766 more
Y Combinator mafia4,716
Also came through, then founded or led a company.
Ryan SheaEntrepreneurshipFounded StacksTarek MansourFounded KalshiSuhail DoshiEating beans & riceFounded Playground +1Subomi OluwalanaW22Founded ConvoyDarius "Bubs" MonsefS19Founded Sightbox +3Matthew ScholzFounded Oisin Biotechnologies +3
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Columbia University mafia200
Also came through, then founded or led a company.
Ben HorowitzBAFounded OpswareChris DixonBachelor of Arts - BAFounded HunchKai-Fu LeeA.B.Founded 01Robin ChanB.A.Founded Operator +2Kevin M. SlawinB.A.Founded Perseus SENOLYTIX +2Joey LevyBachelor of Arts (B.A.)Founded Draftpot +2
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Same school
Also attended Columbia University726
Ben HorowitzCo-founder & General Partner at Andreessen HorowitzDoug LeonePartner at Sequoia Capital; former Global Managing PartnerChris DixonFounder & Managing Partner of a16z crypto at Andreessen HorowitzKai-Fu LeeChairman of Sinovation Ventures and CEO of 01.AIGabriella GiglioHR & Executive Talent at General CatalystScott BillerInvestor at GV (Google Ventures)
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Also attended Y Combinator2,000
Tarek MansourCo-founder & CEO of KalshiSuhail DoshiFounder of Mixpanel; founder of ParticleSubomi OluwalanaCo-founder & CEO of ConvoyMaroof AhmedFounder at Octopus VenturesJustin SwartPartner at Bitkraft Esports VenturesCollin WallaceGeneral Partner at Lobby Capital
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