Founder Directory
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Founders11
Known for these resultsRole73%Role is parsed from founder titles in yc.db. Known for 73% 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.Bio91%Bio coverage: 91% 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-company9%Ex-company is matched from bios with employment context (ex-, formerly, worked at). 9% of these rows have at least one match.School45%School is matched from bios, case-sensitive for acronyms. 45% of these rows have at least one match.
- Christ XuFounder/CTO · RationalS26B2B · San Francisco
- Jibril Moinuddin@JibrilAsifFounder/CEO · RationalS26B2B · San Francisco
- Jonas Nelle@jonas_nelleFounder · AutotabS23B2B · San Francisco
- Adam Yaari@adamyaariFounder/CEO · Serinus BiosciencesS22Healthcare · New York
- Maxwell Sherman@m_a_shermanFounder/CTO · Serinus BiosciencesS22Healthcare · New York
- Dillan DiNardo@DillanDiNardoFounder/CEO · Mindstate Design LabsS21Healthcare · San Francisco
- Tom RayFounder · Mindstate Design LabsS21Healthcare · San Francisco
- Bernhard TittelbachFounder · KilobaserW21Healthcare · Graz
- Sarah Sandnes@sarahbeyahteFounder/CTO · SafetyWingW18Fintech · San Francisco
- Sondre RaschFounder/CEO · SafetyWingW18Fintech · San Francisco
- Saleem KhatriFounder/CEO · InstavestW15Fintech · San Francisco
FOUNDERROLEBATCHINDUSTRYLOCATIONTEAMX_url
Christ XuRationalFounder/CTOSummer 2026B2BSan Francisco, United States2—Jibril MoinuddinRationalFounder/CEOSummer 2026B2BSan Francisco, United States2https://x.com/JibrilAsifJonas NelleAutotabFounderSummer 2023B2BSan Francisco, United States2https://x.com/jonas_nelleAdam YaariSerinus BiosciencesFounder/CEOSummer 2022HealthcareNew York, United States6https://x.com/adamyaariMaxwell ShermanSerinus BiosciencesFounder/CTOSummer 2022HealthcareNew York, United States6https://x.com/m_a_shermanDillan DiNardoMindstate Design LabsFounder/CEOSummer 2021HealthcareSan Francisco, United States7https://x.com/DillanDiNardoTom RayMindstate Design LabsFounderSummer 2021HealthcareSan Francisco, United States7—Bernhard TittelbachKilobaserFounderWinter 2021HealthcareGraz, Austria10—Sarah SandnesSafetyWingFounder/CTOWinter 2018FintechSan Francisco, United States130https://x.com/sarahbeyahteSondre RaschSafetyWingFounder/CEOWinter 2018FintechSan Francisco, United States130—Saleem KhatriInstavestFounder/CEOWinter 2015FintechSan Francisco, United States2—
Showing 1–11 of 11 founders
Jibril Moinuddin
Founder/CEO·Rational
PRIMARY INFO
RoleFounder/CEO
Team size2
BatchSummer 2026
LocationSan Francisco, United States
Company statusActive
StageEarly
BIO
CEO at Rational. Previously founding engineer at Buckeye AI, TrueFoundry. Founded STEMplicity Education. Dropped out of University of Michigan. Non-Trivial Fellow.
Ex-company, school and discipline below are derived from this bio. Nothing is inferred when the bio is missing.
BACKGROUND
CredentialsDropout / Thiel
DisciplineEngineerKeyword match from the bio text, not a classifier.
TRACK RECORD
First YC company on record
COMPANY CONTEXT
RationalAI Employees for Accounting
Co-foundersChrist Xu
