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About
Jae Choi is a co-founder at Sponge and previously worked on crypto initiatives at Stripe.
Founder at SpongeYC W26
Intro paths
Jae went through Y Combinator (Winter 2026) — any YC alum in your network can reach them through the YC community.
Their group partner at YC was Brad Flora, Backing expeditions into the future — the partner who ran Sponge's batch and knows the company first-hand. YC profile ↗
In turn, Jae can intro founders to Sponge's investors below.
Sponge's investors · 12
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Co-founders at Sponge
Frequently asked questions
- Who is Jae Choi?
- Jae Choi is a co-founder at Sponge and previously worked on crypto initiatives at Stripe.
- Where does Jae Choi work?
- Jae Choi is Founder of Sponge.
- What companies did Jae Choi found?
- Jae Choi founded Sponge.
Founder mafias
Y Combinator mafia10,594
Also came through, then founded or led a company.
IBM mafia657
Also came through, then founded or led a company.
University of Waterloo mafia428
Also came through, then founded or led a company.
Stripe mafia157
Also came through, then founded or led a company.
Flexport mafia37
Also came through, then founded or led a company.
About this profile. Compiled from public sources — Sponge'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