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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.
CEO at SilmarilYC X26
Intro paths
Aum went through Y Combinator (Spring 2026) — any YC alum in your network can reach them through the YC community.
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 ↗
In turn, Aum can intro founders to Silmaril's investors below.
Silmaril's investors · 9
Co-founders at Silmaril
Investments
Investor
Per curated public sources.
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 CEO of Silmaril.
- What companies did Aum Upadhyay found?
- Aum Upadhyay founded Silmaril.
- What companies has Aum Upadhyay invested in?
- Investments tracked here include Autostep.
Founder mafias
Y Combinator mafia10,594
Also came through, then founded or led a company.
Columbia Engineering mafia50
Also came through, then founded or led a company.
About this profile. Compiled from public sources — Silmaril's own website and public professional profiles — and summarised by Fundraising Fox; every fact is kept with where it came from. Spotted an error, or would rather not be listed? Email privacy@fundraisingfox.com · How we build profiles · Your rights