About
Regina Lin is CEO and co-founder of Dex. She studied mathematics and computational science at Harvard, and previously co-founded Contour AI, an LLM evaluation devOps platform, while also contributing to e-commerce marketplace development and working in technology investment roles.
Founder at DexYC W25
Intro paths
Regina went through Y Combinator (Winter 2025) — any YC alum in your network can reach them through the YC community.
In turn, Regina can intro founders to Dex's investors below.
Dex's investors · 4
Co-founders at Dex
Experience
- ThirdLayer (YC W25)Co-Founder, CEOcurrent2025 — present
- various financial firmstech investing2023 — 2024
- Stealth Startupcofounder2023 — 2024
- Harvard UniversityMath 152 (discrete mathematics)2022 — 2024Cambridge, Massachusetts, United States
- BazarProduct2022 — 2023
- Epoch Performing ArtsFounder2017 — 2022
Education
- Y CombinatorW25
- Harvard UniversityBA, Mathematics & Concurrent Master's in CSE
- Massachusetts Institute of TechnologyCross-Registered (3 courses)
- Proddev cohort 4
Skills & more
Languages Python · Spanish
From Regina's professional profile.
Founder mafias
Y Combinator mafia8,668
Also came through, then founded or led a company.
+ 8,661 more
Massachusetts Institute of Technology mafia464
Also came through, then founded or led a company.
+ 457 more
Harvard University mafia283
Also came through, then founded or led a company.
+ 276 more
Prod mafia14
Also came through, then founded or led a company.
+ 7 more
Same school
Also attended Y Combinator2,000
+ 1,994 more
Also attended Harvard University1,470
+ 1,464 more
Also attended Massachusetts Institute of Technology1,289
+ 1,283 more
Shared employers
Also worked at ThirdLayer (YC W25)2
Also worked at Stealth Startup330
+ 324 more
Also worked at Harvard University270
+ 264 more





























