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About
Alex Chantavy is co-founder and CEO of SubImage. Previously, he was a staff engineer at Lyft where he developed an open source security graph tool, and a security engineer on Microsoft's Red Team focused on cloud security. He has also held positions in security and infrastructure roles at the NSA.
CEO at SubImageYC W25
Intro paths
Alex went through Y Combinator (Winter 2025) — any YC alum in your network can reach them through the YC community.
Their group partner at YC was Gustaf Alstromer, General Partner at Y Combinator — the partner who ran SubImage's batch and knows the company first-hand. YC profile ↗
In turn, Alex can intro founders to SubImage's investors below.
SubImage's investors · 4
Co-founders at SubImage
Investments
Per curated public sources.
Frequently asked questions
- Who is Alex Chantavy?
- Alex Chantavy is co-founder and CEO of SubImage. Previously, he was a staff engineer at Lyft where he developed an open source security graph tool, and a security engineer on Microsoft's Red Team focused on cloud security. He has also held positions in security and infrastructure roles at the NSA.
- Where does Alex Chantavy work?
- Alex Chantavy is CEO of SubImage.
- What companies did Alex Chantavy found?
- Alex Chantavy founded SubImage.
- What companies has Alex Chantavy invested in?
- Investments tracked here include Mastra, Osmosis.
Founder mafias
Y Combinator mafia10,594
Also came through, then founded or led a company.
Microsoft mafia1,488
Also came through, then founded or led a company.
Lyft mafia100
Also came through, then founded or led a company.
University of Hawaii at Manoa mafia38
Also came through, then founded or led a company.
About this profile. Compiled from public sources — SubImage'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