Ali Attar
FounderFounder at Lightberry · Founder, CPO at SigmaOS
San Francisco, California, United States
FoundedLightberry · YCSigmaOS · YC
About
Ali Attar is the founder of Lightberry, a company in the F25 batch.
Founder at LightberryYC F25
Intro paths
Ali went through Y Combinator (Fall 2025) — any YC alum in your network can reach them through the YC community.
Their group partner at YC was Garry Tan, President & CEO of Y Combinator — the partner who ran Lightberry's batch and knows the company first-hand. YC profile ↗
In turn, Ali can intro founders to Lightberry's investors below.
Lightberry's investors · 5
Co-founders at Lightberry
Founder, CPO at SigmaOSYC S21
Intro paths
Ali went through Y Combinator (Summer 2021) — any YC alum in your network can reach them through the YC community.
Their group partner at YC was Gustaf Alstromer — the partner who ran SigmaOS's batch and knows the company first-hand. YC profile ↗
In turn, Ali can intro founders to SigmaOS's investors below.
SigmaOS's investors · 4
Co-founders at SigmaOS
Experience
- LightberryFoundercurrent2025 — presentSan Francisco, California, United States
- SigmaOSFounder / CPOcurrent2021 — presentLondon, England, United Kingdom
- Dromadis HealthFounder / CEO2020 — 2021London, England, United Kingdom
- Purpl EventsFounder / CEO2019 — 2020London, United Kingdom
- LoopFounder / CEO2016 — 2019London, United Kingdom
- Imperial College LondonGraduate Tutor - Mathematics2017 — 2018London, United Kingdom
- mathscon.Project Director2016 — 2017London, United Kingdom
- AcubedUser Experience Engineer2016San Francisco Bay Area
Skills & more
Languages Arabic · English · French · Japanese · Latin · Spanish
From Ali's professional profile.
Frequently asked questions
- Who is Ali Attar?
- Ali Attar is the founder of Lightberry, a company in the F25 batch.
- Where does Ali Attar work?
- Ali Attar is Founder of Lightberry and Founder, CPO at SigmaOS.
- What companies did Ali Attar found?
- Ali Attar founded Lightberry, SigmaOS.
- Where did Ali Attar go to school?
- Ali Attar studied at Y Combinator (Summer 2021 (S21)); Imperial College London (Master’s Degree, Mathematics); Lycée Français International George Pompidou (Scientific Baccalauréat, Mathematics).
Founder mafias
Y Combinator mafia8,773
Also came through, then founded or led a company.
+ 8,766 more
Y Combinator mafia4,716
Also came through, then founded or led a company.
+ 4,709 more
Imperial College London mafia196
Also came through, then founded or led a company.
+ 189 more
SigmaOS mafia3
Also came through, then founded or led a company.
Lightberry mafia2
Also came through, then founded or led a company.
Same school
Also attended Y Combinator2,000
+ 1,994 more
Also attended Imperial College London499
+ 493 more
Also attended Harvard University1,558
+ 1,552 more
