About
Aum Upadhyay previously worked on security and privacy frameworks at AWS. He is now co-founder and CEO of Silmaril, where he focuses on prompt injection defense.
Founder at SilmarilYC X26
Intro paths
YC
Aum went through Y Combinator (Spring 2026) — any YC alum in your network can reach them through the YC community.
GP
Their group partner at YC was Garry Tan, President & CEO of Y Combinator — the partner who ran Silmaril's batch and knows the company first-hand. YC profile ↗
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In turn, Aum can intro founders to Silmaril's investors below.
Silmaril's investors · 1
Co-founders at Silmaril
EV
Eduardo VelascoFounder
Experience
- SilmarilCo-Founder & CEOcurrent2025 — present
- Amazon Web Services (AWS)Software Development Engineer II2022 — 2024
- Vybe TechnologiesCo-founder & President2019 — 2021
- Columbia University Biomedical EngineeringStudent Researcher2019 — 2020
- University of WashingtonResearch Intern2018 — 2019
- Stony Brook UniversitySummer Researcher2018
Frequently asked questions
- Who is Aum Upadhyay?
- Aum Upadhyay previously worked on security and privacy frameworks at AWS. He is now co-founder and CEO of Silmaril, where he focuses on prompt injection defense.
- Where does Aum Upadhyay work?
- Aum Upadhyay is Founder of Silmaril.
- What companies did Aum Upadhyay found?
- Aum Upadhyay founded Silmaril.
- Where did Aum Upadhyay go to school?
- Aum Upadhyay studied at Columbia Engineering (Bachelor of Science - BS, Computer Science).
Founder mafias
Y Combinator mafia9,496
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Same school
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Shared employers
Also worked at Amazon Web Services (AWS)317
Nancy WangInvestor at Felicis VenturesJon TurowVenture Partner at Madrona Venture GroupEric AndersonPartner at Scale Venture PartnersKeerthi NalabotuInvestor at True VenturesAdam NaorInvestor at CapitalGKen HowardVice President of Technology Services at Flare Capital Partners
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Also worked at Columbia University Biomedical Engineering1
Also worked at University of Washington128
Joe HorsmanInvestor at Madrona Venture GroupMike FridgenVenture Partner at Madrona Venture GroupSid ShenaiVenture partner at Madrona and co-founder and CEO of Proof DiagnosticsPaul JennyBoard Chair at CincyTechJason PrestonInvestor at Alsop Louie PartnersElliot HershbergScientist, Writer, and Investor on a mission to accelerate The Century of Biology
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Also worked at Stony Brook University28
Hal PazInvestor at Khosla VenturesKonstantinos AprilakisPartner at Deerfield Management CompanyMiguel Garcia DiazVice President for Research, Scholarship and Innovation at University of Delaware at The Innovation SpaceLorne TaichmanDirector, Science & Technology at Windham Capital PartnersRachel SacksAnalyst at Maniv MobilityLouis TheodorouAI Lead at Oakglen
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