About
Andrew Sy previously worked at Meta and on machine learning infrastructure at Scale AI, which handled over 10 million calls daily. He is now building Polymorph.
Founder at PolymorphYC W26
Intro paths
YC
Andrew went through Y Combinator (Winter 2026) — any YC alum in your network can reach them through the YC community.
GP
Their group partner at YC was Brad Flora, Backing expeditions into the future — the partner who ran Polymorph's batch and knows the company first-hand. YC profile ↗
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In turn, Andrew can intro founders to Polymorph's investors below.
Polymorph's investors · 1
Experience
- Polymorph (YC W26)Co-founder, CEOcurrent2026 — presentSan Francisco Bay Area
- Opal SecurityTech Lead / NY Site Lead2023 — 2026New York, New York, United States
- Scale AIMachine Learning Infrastructure Engineer2021 — 2023San Francisco, California, United States
- MetaSoftware Engineer2019 — 2021Menlo Park, CA
- Palantir TechnologiesSoftware Engineering Intern2018Palo Alto, California, United States
- MetaSoftware Engineering Intern2018Menlo Park, California, United States
- IntuitSoftware Engineer Co-op2017
- UberData Science Intern2017
Frequently asked questions
- Who is Andrew Sy?
- Andrew Sy previously worked at Meta and on machine learning infrastructure at Scale AI, which handled over 10 million calls daily. He is now building Polymorph.
- Where does Andrew Sy work?
- Andrew Sy is Founder of Polymorph.
- What companies did Andrew Sy found?
- Andrew Sy founded Polymorph.
- Where did Andrew Sy go to school?
- Andrew Sy studied at Y Combinator; Northeastern University (Bachelor’s Degree, Computer Science and Mathematics); Xavier School.
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
+ 4,709 more
Uber mafia170
Also came through, then founded or led a company.
Garrett CampFounder & ChairmanFounded Aero +1Raquel UrtasunChief Scientist, Head of Uber ATG R&DFounded WaabiRobin ChanAdvisorFounded Operator +2Dan LifshitsEngineering ContractorFounded GO GLOBAL WORLD +1Ben LernerSoftware Engineer, InfrastructureFounded Espresso AI +1Bastien BeurierSoftware EngineerFounded Lantern +1
+ 163 more
Scale AI mafia47
Also came through, then founded or led a company.
Alexandr WangCo-founder & CEOFounded Scale AILucy GuoCo-founderFounded PassesWilliam HockeyBoard DirectorFounded PlaidJosephine LeeIntern - GenAIFounded Palette Labs +1Daniel LevineBoard MemberFounded ChartioArnav SahuInvestorFounded Wolfia
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+ 40 more
Northeastern University mafia43
Also came through, then founded or led a company.
James SteinbergBachelor's degreeFounded OpenShelf +2Luke ZaientzBSFounded Reigning Champs +1Vicente ZavarceBachelor’s DegreeFounded Yummy +1Kahlil LaljiBachelor's of ScienceFounded Natural +1Kasey ZhangBachelor of ScienceFounded Gulp +1Tim McCarthyBachelor of ScienceFounded Spring Loaded Technology +1
+ 36 more
Same school
Also attended Y Combinator2,000
Tarek MansourCo-founder & CEO of KalshiSuhail DoshiFounder of Mixpanel; founder of ParticleSubomi OluwalanaCo-founder & CEO of ConvoyArhaan A.Deeptech Fellow at Clear VenturesMaroof AhmedFounder at Octopus VenturesJustin SwartPartner at Bitkraft Esports Ventures
+ 1,994 more
Also attended Northeastern University338
Matt GuineyChief Financial Officer at Flybridge Capital PartnersAzamat GasanovAssociate at Marlin Equity PartnersSaunaz MoradiPartner, Communications at Lux CapitalBrian DixonManaging Partner at Kapor CapitalMurat BicerGeneral Partner at CRV (Charles River Ventures)Arjun BalajiPartner, Investing & Research at Paradigm
+ 332 more
Also attended Xavier School8
Hamza RafiqInvestment Manager at Gresham House VenturesEric SyResearch Director at Incubate FundMigu MacaleSenior Investments Associate at Ideaspace VenturesDavid OngchocoCo-Founder and General Partner at Comma CapitalJacob CueAnalyst at Foxmont Capital PartnersGervin YangInvestor at Openspace Capital Pte. Ltd.
+ 2 more
Shared employers
Also worked at Scale AI85
Alexandr WangCo-founder of Scale AI; Chief AI Officer at MetaLucy GuoCo-founder of Scale AI; founder & CEO of PassesWilliam HockeyCo-founder of Plaid; founder & CEO of ColumnBrad PorterFounder & CEO of Collaborative RoboticsCat WuInvestor at Index VenturesMike VolpiInvestor at Index Ventures
+ 79 more
Also worked at Meta334
Nat FriedmanCo-lead of Meta Superintelligence Labs; co-founder of NFDGDaniel GrossMeta Superintelligence Labs; co-founder of NFDG and Safe SuperintelligenceDrew HoustonCo-founder & CEO of DropboxGabriel PereyraCo-founder & President of HarveyTinaInvestments & Portfolio Services Team Member at Clear VenturesMike ArpaiaComputer scientist working on machine learning and data infrastructure
+ 328 more
Also worked at Palantir Technologies232
Garry TanPresident & CEO of Y CombinatorJoe LonsdaleFounder & Managing Partner of 8VC; co-founder of Palantir and AddeparTrae StephensPartner at Founders Fund and co-founder of AndurilTarek MansourCo-founder & CEO of KalshiViviana FagaGeneral Partner at Felicis VenturesBryan OffuttInvestor at Index Ventures
+ 226 more
Also worked at Intuit113
Nate WangVP of Investments at Plum Alley InvestmentsDavid HahnCISO Operating Partner at Ballistic VenturesAnkita BalotiaPrincipal at Fireside Ventures Advisory LlpGregory BillingtonResearch at Transform Capital ManagementArjun AroraInvestor at Streamlined VenturesAdam CoccariManaging Director at HubSpot Ventures
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+ 107 more