Founder Directory
Built by Keitoto
Founders20
Known for these resultsRole35%Role is parsed from founder titles in yc.db. Known for 35% 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.Bio50%Bio coverage: 50% 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-company45%Ex-company is matched from bios with employment context (ex-, formerly, worked at). 45% of these rows have at least one match.School35%School is matched from bios, case-sensitive for acronyms. 35% of these rows have at least one match.
- Joseph McAllisterFounder/CTO · MouseCatW26B2B · New York
- Nicholas Aldridge@nickaldridge_Founder/CEO · MouseCatW26B2B · New York
- Omar Draz@oamdrazFounder · IndemniW24B2B · San Francisco
- Saif FarooquiFounder · Corgi LabsW23Fintech · Singapore
- Ayan Bandyopadhyay@ayanicbandFounder · FinicW23Fintech · San Francisco
- Jason Fan@jfan001Founder · FinicW23Fintech · San Francisco
- Alon PeretzFounder · BallerineS22Fintech · Tel Aviv
- Nitzan GelbardFounder · BallerineS22Fintech · Tel Aviv
- Noam IzhakiFounder · BallerineS22Fintech · Tel Aviv
- Arjun Bisen@ArjunBisen1Founder · OverwatchS22B2B · New York
- Zara Perumal@zaraperumalFounder · OverwatchS22B2B · New York
- Alice Deng@alicevdengFounder · SlopeS21Fintech · San Francisco
- Lawrence Lin Murata@LawLMFounder · SlopeS21Fintech · San Francisco
- Conor BurkeFounder/CTO · InscribeS18B2B · San Francisco
- Ronan Burke@rnnbrkFounder/CEO · InscribeS18B2B · San Francisco
- Johan BrissmyrFounder/CEO · CastleW16B2B · San Francisco
- Sebastian WallinFounder/CTO · CastleW16B2B · San Francisco
- Josh YudakenFounder/Lead Infrastructure Engineer · SmyteW15B2B · San Francisco
- Julian TempelsmanFounder · SmyteW15B2B · San Francisco
- Pete HuntFounder · SmyteW15B2B · San Francisco
FOUNDERROLEBATCHINDUSTRYLOCATIONTEAMX_url
Joseph McAllisterMouseCatFounder/CTOWinter 2026B2BNew York, United States6—Nicholas AldridgeMouseCatFounder/CEOWinter 2026B2BNew York, United States6https://x.com/nickaldridge_Omar DrazIndemniFounderWinter 2024B2BSan Francisco, United States7https://x.com/oamdrazSaif FarooquiCorgi LabsFounderWinter 2023FintechSingapore, Singapore3—Ayan BandyopadhyayFinic2× YCFounderWinter 2023FintechSan Francisco, United States4https://x.com/ayanicbandJason FanFinicFounderWinter 2023FintechSan Francisco, United States4https://x.com/jfan001Alon PeretzBallerineFounderSummer 2022FintechTel Aviv, Israel16—Nitzan GelbardBallerineFounderSummer 2022FintechTel Aviv, Israel16—Noam IzhakiBallerineFounderSummer 2022FintechTel Aviv, Israel16—Arjun BisenOverwatchFounderSummer 2022B2BNew York, United States14https://x.com/ArjunBisen1Zara PerumalOverwatchFounderSummer 2022B2BNew York, United States14https://x.com/zaraperumalAlice DengSlope2× YCFounderSummer 2021FintechSan Francisco, United States16https://x.com/alicevdengLawrence Lin MurataSlopeFounderSummer 2021FintechSan Francisco, United States16https://x.com/LawLMConor BurkeInscribeFounder/CTOSummer 2018B2BSan Francisco, United States35—Ronan BurkeInscribeFounder/CEOSummer 2018B2BSan Francisco, United States35https://x.com/rnnbrkJohan BrissmyrCastleFounder/CEOWinter 2016B2BSan Francisco, United States20—Sebastian WallinCastleFounder/CTOWinter 2016B2BSan Francisco, United States20—Josh YudakenSmyteFounder/Lead Infrastructure EngineerWinter 2015B2BSan Francisco, United States11—Julian TempelsmanSmyteFounderWinter 2015B2BSan Francisco, United States11—Pete HuntSmyteFounderWinter 2015B2BSan Francisco, United States11—
Showing 1–20 of 20 founders
Johan Brissmyr
Founder/CEO·Castle
PRIMARY INFO
RoleFounder/CEO
Team size20
BatchWinter 2016
LocationSan Francisco, United States
Company statusActive
StageGrowth
BIO
No bio on the YC profile. Background, credentials and discipline below are Unknown — nothing is inferred when the bio is missing.
BACKGROUND
Unknown — no bio.
Credentialsunknown
DisciplineunknownKeyword match from the bio text, not a classifier.
TRACK RECORD
First YC company on record
COMPANY CONTEXT
Castle
Block bots & bad behavior
Co-foundersSebastian Wallin
