Founder Directory
Built by Keitoto
Founders41
Known for these resultsRole68%Role is parsed from founder titles in yc.db. Known for 68% of these rows — the rest have no title at all, mostly 2019–2023. Those rows stay in the result and are counted as Unknown, never as No.Bio90%Bio coverage: 90% of these founders have a bio on their YC profile. Every bio-derived facet (ex-company, school, credentials, discipline) is Unknown for the rest.Ex-company34%Ex-company is matched from bios with employment context (ex-, formerly, worked at). 34% of these rows have at least one match.School32%School is matched from bios, case-sensitive for acronyms. 32% of these rows have at least one match.
- Mathieu PerezFounder/CEO · COACHS26B2B · San Francisco
- Nicolas Sebag@sebcnyFounder/CTO · COACHS26B2B · San Francisco
- Thomas PerezFounder/COO · COACHS26B2B · San Francisco
- Christ XuFounder/CTO · RationalS26B2B · San Francisco
- Jibril Moinuddin@JibrilAsifFounder/CEO · RationalS26B2B · San Francisco
- Aahil Valliani@aahil__valFounder · VestrisS26Real Estate and Construction · San Francisco
- Joshua Tang@joshtang07Founder · VestrisS26Real Estate and Construction · San Francisco
- Armen ArakelyanFounder/CTO · OrnadyneX26Industrials · Los Angeles
- Geourg Kivijian@geourgkivijianFounder/CEO · OrnadyneX26Industrials · Los Angeles
- David Newell@DavidNewell95Founder · End CloseW26B2B
- Sean Bolton@SeanBoltonFounder/CEO · End CloseW26B2B
- Lars Gjardar MusæusFounder/CTO · CrunchedF25B2B · Oslo
- Ray Wang@RuiCromwellFounder/CEO · FlickF25Consumer · San Francisco
- Zoey Zhang@ZoeyZ1004Founder · FlickF25Consumer · San Francisco
- Brandon Abreu Smith@brandonstarxelFounder/CTO · Structured AIF25Real Estate and Construction · New York
- Issy Greenslade@Green181024Founder/COO · Structured AIF25Real Estate and Construction · New York
- Raymond Zhao@stingrayzz22Founder/CEO · Structured AIF25Real Estate and Construction · New York
- Aaron Yu@AaronYu397421Founder/CTO · QualGentX25B2B · San Francisco
- Shivam Agrawal@ShivamHacksFounder/CEO · QualGentX25B2B · San Francisco
- Erin KimFounder/CEO · MeshW25B2B · San Francisco
FOUNDERROLEBATCHINDUSTRYLOCATIONTEAMX_url
Mathieu PerezCOACHFounder/CEOSummer 2026B2BSan Francisco, United States4—Nicolas SebagCOACHFounder/CTOSummer 2026B2BSan Francisco, United States4https://x.com/sebcnyThomas PerezCOACHFounder/COOSummer 2026B2BSan Francisco, United States4—Christ XuRationalFounder/CTOSummer 2026B2BSan Francisco, United States2—Jibril MoinuddinRationalFounder/CEOSummer 2026B2BSan Francisco, United States2https://x.com/JibrilAsifAahil VallianiVestrisFounderSummer 2026Real Estate and ConstructionSan Francisco, United States2https://x.com/aahil__valJoshua TangVestrisFounderSummer 2026Real Estate and ConstructionSan Francisco, United States2https://x.com/joshtang07Armen ArakelyanOrnadyneFounder/CTOSpring 2026IndustrialsLos Angeles, United States4—Geourg KivijianOrnadyneFounder/CEOSpring 2026IndustrialsLos Angeles, United States4https://x.com/geourgkivijianDavid NewellEnd Close2× YCFounderWinter 2026B2BUnknown2https://x.com/DavidNewell95Sean BoltonEnd CloseFounder/CEOWinter 2026B2BUnknown2https://x.com/SeanBoltonLars Gjardar MusæusCrunchedFounder/CTOFall 2025B2BOslo, Norway5—Ray WangFlickFounder/CEOFall 2025ConsumerSan Francisco, United States2https://x.com/RuiCromwellZoey ZhangFlickFounderFall 2025ConsumerSan Francisco, United States2https://x.com/ZoeyZ1004Brandon Abreu SmithStructured AIFounder/CTOFall 2025Real Estate and ConstructionNew York, United States10https://x.com/brandonstarxelIssy GreensladeStructured AIFounder/COOFall 2025Real Estate and ConstructionNew York, United States10https://x.com/Green181024Raymond ZhaoStructured AIFounder/CEOFall 2025Real Estate and ConstructionNew York, United States10https://x.com/stingrayzz22Aaron YuQualGentFounder/CTOSpring 2025B2BSan Francisco, United States10https://x.com/AaronYu397421Shivam AgrawalQualGentFounder/CEOSpring 2025B2BSan Francisco, United States10https://x.com/ShivamHacksErin KimMeshFounder/CEOWinter 2025B2BSan Francisco, United States3—
Showing 1–20 of 41 founders
Christ Xu
Founder/CTO·Rational
PRIMARY INFO
RoleFounder/CTO
Team size2
BatchSummer 2026
LocationSan Francisco, United States
Company statusActive
StageEarly
BIO
CTO at Rational. Youngest Tencent Senior SWE, OpenAI SWE. 2x IOI Camp, IMO Camp, published algo researcher.
Ex-company, school and discipline below are derived from this bio. Nothing is inferred when the bio is missing.
BACKGROUND
No notable employer or school mentioned in the bio.
Credentialsnone mentioned
DisciplineResearcherKeyword match from the bio text, not a classifier.
TRACK RECORD
First YC company on record
COMPANY CONTEXT
RationalAI Employees for Accounting
Co-foundersJibril Moinuddin@JibrilAsif
