About Umur Cubukcu
Umur Cubukcu co-founded Ubicloud, which provides cloud services customers can run themselves or use as a managed service.
He previously served as a visiting partner for Y Combinator's W23 and S23 batches. Before that, he co-founded and served as chief executive officer of Citus Data, which made a PostgreSQL database that works across servers. He later led Azure's PostgreSQL product team after Microsoft acquired Citus Data in 2019.
Experience
This experience comes from official bios and from SEC filings. For roles taken from filings, the years are when the filings name Umur Cubukcu in the role, so the role may have started earlier or lasted longer.
Ubicloud Inc. Current
Founder and director
2026 – Present · San Francisco, CA
Ubicloud provides self-hosted and managed computing, networking, databases and software-build machines on physical servers.
YC
Y Combinator
visiting partner
CD
Citus Data
Co-founder and CEO
AZ
Azure
Key Colleagues at Startups
The people Umur Cubukcu works with at each company, as listed on that company's latest Form D.
Ubicloud Inc. · Form D, Nov 9, 2026
