Fundraising Fox

Umur Cubukcu

Founder

Founder at Ubicloud

Palo Alto, California, United States

FoundedUbicloud · YC

About

Umur Cubukcu co-founded Citus Data (YC S11), a distributed PostgreSQL database company acquired by Microsoft in 2019, where he later led the PostgreSQL product team at Azure. He served as a visiting partner at Y Combinator for W23 and S23 before co-founding Ubicloud.

LinkedIn ↗X / Twitter ↗
Latest on 𝕏

Umur Cubukcu @umurc

By our estimates, this makes @UbicloudHQ approximately 1 billion times more cost-effective than AWS. Come to @UbicloudHQ :) https://t.co/LEddaEhY17

Jul 17, 2026 · ♥ 19 · ⇄ 3

Umur Cubukcu @umurc

I’ve known the founders @emiratli_ , Buğra and Arda well for a long time, and they’ve been the same from day one: intense, thoughtful, and obsessed with building something great. Proud to be an early believer in @hockeystackHQ. Huge moment for the team. https://t.co/1Oxoai1tiw

Apr 15, 2026 · ♥ 4

Umur Cubukcu @umurc

Wonderful to see @paradedb now working with @citusdata, bringing distributed text search to Postgres. 15 years on and Citus and open source still continues to expand what Postgres can do at scale. It’s been a pleasure backing the ParadeDB team https://t.co/QLE6MZfLCt

Apr 15, 2026 · ♥ 10 · ⇄ 1

Founder at UbicloudYC W24

Intro paths

YC

Umur went through Y Combinator (Winter 2024) — any YC alum in your network can reach them through the YC community.

GP

Their group partner at YC was Garry Tan, President & CEO of Y Combinator — the partner who ran Ubicloud's batch and knows the company first-hand. YC profile ↗

→

In turn, Umur can intro founders to Ubicloud's investors below.

Ubicloud's investors · 6

500 Emerging Europee2vcRainfall VenturesScaleX VenturesWayfinder VenturesY Combinator

Co-founders at Ubicloud

OEOzgun Erdogan
Ozgun ErdoganFounder
DFDaniel Farina
Daniel FarinaFounder

Experience

  1. UbicloudCofoundercurrent2023 — presentSan Francisco Bay Area
  2. Y CombinatorVisiting Group Partner2022 — 2023
  3. MicrosoftPostgreSQL and Hyperscale (Citus) at Azure2019 — 2022San Francisco Bay Area
  4. Citus DataCEO and Co-founder2011 — 2022
  5. TrueDemand SoftwareDirector Business Development2006 — 2011
  6. The Boston Consulting GroupConsultant2005 — 2006
  7. The Boston Consulting GroupAssociate2003 — 2005

Education

  1. Stanford UniversityM.S., Management Science & Engineering2001 — 2003
  2. Boğaziçi UniversityB.S., Industrial Engineering1997 — 2001
  3. Robert College1990 — 1997

Skills & more

Start-ups62Business Strategy36Analytics30Product Management31Big Data6Strategy35

From Umur's professional profile.

Same school

Also attended Stanford University1,639

Peter ThielCo-founder & Partner at Founders FundReid HoffmanCo-founder of LinkedIn; Partner at GreylockDavid SacksCo-founder & General Partner at Craft Ventures; former White House AI & Crypto CzarKeith RaboisManaging Director at Khosla VenturesGarry TanPresident & CEO of Y CombinatorAlfred LinPartner at Sequoia Capital

+ 1,633 more

Also attended Boğaziçi University50

Santo PolitiInvestor at Spark CapitalElçinTalent Team at Hummingbird VenturesAnıl Gökçen KörpınarManaging Partner at IdacapitalSecil BaysalOperator in Residence at QED InvestorsGülenay ÖzbekInvestment Director at IdacapitalSercan OzcanPartner, Finance & Operations at AlleyCorp

+ 44 more

Also attended Robert College25

ElçinTalent Team at Hummingbird VenturesMelike Abacioglu GunesVP of Marketing at Asymmetric Capital PartnersCaglar UrcanInvestment | 212 NexT at 212Kaan HotanOperations | Venture Fellow at 212Onur TuranOperations | Finance at 212Burak CendekManaging Director at Autotech Ventures

+ 19 more

Shared employers

Also worked at Ubicloud6

Dilek DayinlarliGeneral Partner at ScaleX VenturesArın ÖzkulaInvestor at 500 Emerging EuropeEnis HulliInvestor at 500 Emerging EuropeDilek DayınlarlıGeneral Partner at ScaleX VenturesOzgun ErdoganFounder at UbicloudDaniel FarinaFounder at Ubicloud

Also worked at Y Combinator91

Garry TanPresident & CEO of Y CombinatorJessica LivingstonCo-founder of Y CombinatorAlexis OhanianFounder & General Partner of Seven Seven SixMichael SeibelPartner Emeritus at Y CombinatorDalton CaldwellCo-founder of Standard Capital; Partner Emeritus at Y CombinatorHarj TaggarGeneral Partner at Y Combinator

+ 85 more

Also worked at Microsoft672

Reid HoffmanCo-founder of LinkedIn; Partner at GreylockGarry TanPresident & CEO of Y CombinatorJavier SolteroSenior Venture Partner at Felicis VenturesViviana FagaGeneral Partner at Felicis VenturesQuentin ClarkInvestment Team at General CatalystViswa SankaranarayananVenture Partner at Monta Vista Capital

+ 666 more

Also worked at Citus Data2

Ozgun ErdoganFounder at UbicloudDaniel FarinaFounder at Ubicloud