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About
John previously worked at Microsoft, where he optimized Excel's performance and led the porting of Excel's grid rendering technology to mobile platforms.
Founder at KeyDBYC S20
Intro paths
John went through Y Combinator (Summer 2020) — any YC alum in your network can reach them through the YC community.
In turn, John can intro founders to KeyDB's investors below.
KeyDB's investors · 3
Co-founders at KeyDB

Frequently asked questions
- Who is John Sully?
- John previously worked at Microsoft, where he optimized Excel's performance and led the porting of Excel's grid rendering technology to mobile platforms.
- Where does John Sully work?
- John Sully is Founder of KeyDB.
- What companies did John Sully found?
- John Sully founded KeyDB.
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.
Ryerson University mafia41
Also came through, then founded or led a company.
About this profile. Compiled from public sources — KeyDB'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















