Founder Directory
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Founders435
Known for these resultsRole47%Role is parsed from founder titles in yc.db. Known for 47% 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.Bio92%Bio coverage: 92% 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-company27%Ex-company is matched from bios with employment context (ex-, formerly, worked at). 27% of these rows have at least one match.School31%School is matched from bios, case-sensitive for acronyms. 31% of these rows have at least one match.
- Aziz HanafiFounder/CEO · Degla IncF26Industrials · Boston
- Dimitris Koutentakis@_dkoutFounder/CEO · AtomarineS26Industrials · Boston
- Anton Livaja@antonlivajaFounder/CEO · CautionS26B2B · George Town
- Ksenia Lesko@xenushFounder · CautionS26B2B · George Town
- Lance VickFounder/CTO · CautionS26B2B · George Town
- Gurshabd Singh Varaich@gurshabdvFounder/CEO · DefiniteS26B2B · San Francisco
- Rhys Sullivan@RhysSullivanFounder · ExecutorS26B2B · San Francisco
- Cem TokerFounder/COO · NeuromorphicS26Industrials · San Francisco
- Ege Doganay@_doganay_egeFounder/CEO · NeuromorphicS26Industrials · San Francisco
- Vatan Aksoy TezerFounder · NeuromorphicS26Industrials · San Francisco
- Prashant PatelFounder/CTO · OpenRelayS26B2B · Seattle
- Arthur De Los Santos@_arthurdls_Founder/CTO · RindlerS26B2B · Boston
- Michael Serrano@m_y_serranoFounder/CEO · RindlerS26B2B · Boston
- Ali Eren AytekinFounder · SpaceFlow Technologies, Inc.S26B2B · San Francisco
- Emre Isik@Emrre_isikFounder/CEO · SpaceFlow Technologies, Inc.S26B2B · San Francisco
- Hakan Enes AksuFounder · SpaceFlow Technologies, Inc.S26B2B · San Francisco
- Amgad Al-ZamkanFounder/CPO · TenorS26B2B · San Francisco
- Hamze Al-ZamkanFounder/CEO · TenorS26B2B · San Francisco
- Muhtasham Oblokulov@Muhtasham9Founder/CTO · TenorS26B2B · San Francisco
- Roland Jaloszynski@RJaloszynskiFounder/CEO · VelthaS26Fintech · San Francisco
FOUNDERROLEBATCHINDUSTRYLOCATIONTEAMX_url
Aziz HanafiDegla IncFounder/CEOFall 2026IndustrialsBoston, United States2—Dimitris KoutentakisAtomarineFounder/CEOSummer 2026IndustrialsBoston, United States2https://x.com/_dkoutAnton LivajaCautionFounder/CEOSummer 2026B2BGeorge Town, Cayman Islands5https://x.com/antonlivajaKsenia LeskoCautionFounderSummer 2026B2BGeorge Town, Cayman Islands5https://x.com/xenushLance VickCautionFounder/CTOSummer 2026B2BGeorge Town, Cayman Islands5—Gurshabd Singh VaraichDefiniteFounder/CEOSummer 2026B2BSan Francisco, United States3https://x.com/gurshabdvRhys SullivanExecutorFounderSummer 2026B2BSan Francisco, United States1https://x.com/RhysSullivanCem TokerNeuromorphicFounder/COOSummer 2026IndustrialsSan Francisco, United States3—Ege DoganayNeuromorphicFounder/CEOSummer 2026IndustrialsSan Francisco, United States3https://x.com/_doganay_egeVatan Aksoy TezerNeuromorphicFounderSummer 2026IndustrialsSan Francisco, United States3—Prashant PatelOpenRelayFounder/CTOSummer 2026B2BSeattle, United States2—Arthur De Los SantosRindlerFounder/CTOSummer 2026B2BBoston, United States2https://x.com/_arthurdls_Michael SerranoRindlerFounder/CEOSummer 2026B2BBoston, United States2https://x.com/m_y_serranoAli Eren AytekinSpaceFlow Technologies, Inc.FounderSummer 2026B2BSan Francisco, United States4—Emre IsikSpaceFlow Technologies, Inc.Founder/CEOSummer 2026B2BSan Francisco, United States4https://x.com/Emrre_isikHakan Enes AksuSpaceFlow Technologies, Inc.FounderSummer 2026B2BSan Francisco, United States4—Amgad Al-ZamkanTenorFounder/CPOSummer 2026B2BSan Francisco, United States3—Hamze Al-ZamkanTenorFounder/CEOSummer 2026B2BSan Francisco, United States3—Muhtasham OblokulovTenorFounder/CTOSummer 2026B2BSan Francisco, United States3https://x.com/Muhtasham9Roland JaloszynskiVelthaFounder/CEOSummer 2026FintechSan Francisco, United States2https://x.com/RJaloszynski
Showing 1–20 of 435 founders
Mazin Al-Ani
Founder·Definite
PRIMARY INFO
RoleFounder· not in title
Team size3
BatchSummer 2026
LocationSan Francisco, United States
Company statusActive
StageEarly
BIO
Founder at Definite (YC S26). Previously SWE intern at Optiver (quantitative trading systems) and Boosted.ai (agentic AI platform for financial analysts). Studied CS at University of Waterloo.
Ex-company, school and discipline below are derived from this bio. Nothing is inferred when the bio is missing.
BACKGROUND
Credentialsnone mentioned
Disciplinenot detectedKeyword match from the bio text, not a classifier.
TRACK RECORD
First YC company on record
COMPANY CONTEXT
DefiniteBuild everyday back-office agents on one live model of your books
