About
Joseph Tso is a computer science graduate from Princeton and co-founder of Haladir.
Founder at HaladirYC W26
Intro paths
YC
Joseph went through Y Combinator (Winter 2026) — any YC alum in your network can reach them through the YC community.
GP
Their group partner at YC was Diana Hu, General Partner at Y Combinator — the partner who ran Haladir's batch and knows the company first-hand. YC profile ↗
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In turn, Joseph can intro founders to Haladir's investors below.
Haladir's investors · 1
Co-founders at Haladir
Experience
- Haladir (YC W26)Co-Foundercurrent2025 — presentSan Francisco, California, United States
- KnotIntern2025New York City Metropolitan Area
- George Mason UniversityResearcher2022 — 2025Fairfax County, Virginia, United States
Education
- Princeton University
Same school
Also attended Princeton University474
Fabrice GrindaCo-founder & Managing Partner at FJ LabsAndrewAdvisor at Clear VenturesChristal NgAssociate at Golden Gate VenturesDavid CoatsManaging Director & Co-Founder at Correlation VenturesDan MoreheadFounder & CEO at Pantera CapitalGeoff YangCo-Founder at Redpoint Ventures
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Shared employers
Also worked at Haladir (YC W26)3
Also worked at Knot1
Also worked at George Mason University13
Veronica DaiglePresident, National Security Practice at Red Cell IncubationKurt SchererManaging Director at C5 CapitalMikhail ZeldovichAdvisor at Cento VenturesDhruv BansalInvestor at VMG PartnersGillian KrugProgram Manager at Conscious Venture LabLawrence GreenbergVenture Partner at Motley Fool Ventures
+ 7 more