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Joseph McAllister
InvestorFounderCTO at MouseCat
New York, New York, United States
FoundedMouseCat · YC
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About
Joseph McAllister is co-founder and CTO of MouseCat. Previously, he spent four years at Coinbase working on risk decision systems, including streaming data pipelines and fraud detection models. He studied computer science at Cornell University and founded Roo Storage, acquired by Handled in 2020.
CTO at MouseCatYC W26
Intro paths
Joseph 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 Jared Friedman, YC Group Partner — the partner who ran MouseCat's batch and knows the company first-hand. YC profile ↗
In turn, Joseph can intro founders to MouseCat's investors below.
MouseCat's investors · 3
Co-founders at MouseCat
Investments
Per curated public sources.
Frequently asked questions
- Who is Joseph McAllister?
- Joseph McAllister is co-founder and CTO of MouseCat. Previously, he spent four years at Coinbase working on risk decision systems, including streaming data pipelines and fraud detection models. He studied computer science at Cornell University and founded Roo Storage, acquired by Handled in 2020.
- Where does Joseph McAllister work?
- Joseph McAllister is CTO of MouseCat.
- What companies did Joseph McAllister found?
- Joseph McAllister founded MouseCat.
- What companies has Joseph McAllister invested in?
- Investments tracked here include Byteport, Ditto Biosciences, OctaPulse, Pax Historia, Sparkles.
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.
Cornell mafia681
Also came through, then founded or led a company.
Coinbase mafia121
Also came through, then founded or led a company.
Mary Institute and St. Louis Country Day School (MICDS) mafia4
Also came through, then founded or led a company.
About this profile. Compiled from public sources — MouseCat'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