Founder Directory
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Founders22
Known for these resultsRole45%Role is parsed from founder titles in yc.db. Known for 45% 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.Bio100%Bio coverage: 100% 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-company100%Ex-company is matched from bios with employment context (ex-, formerly, worked at). 100% of these rows have at least one match.School23%School is matched from bios, case-sensitive for acronyms. 23% of these rows have at least one match.
- Sherwood Callaway@shcallawayFounder/CEO · SazabiX26B2B · San Francisco
- Sam Kaplan@samrkaplanFounder/CEO · RemixW26Consumer · San Francisco
- Thomas Cesare-HerriauFounder/CTO · SpotPayW26Fintech · San Francisco
- Nishant HoodaFounder/CTO · DocketX25B2B · San Francisco
- Sukhjit Singh@ssinghh14Founder/CEO · Sennu AIW25B2B · San Francisco
- Benjamin PaikFounder/CPO · Afternoon.coF24B2B · New York
- Gokul Kumarresen@GokulKumarresenFounder/CTO · Asha HealthF24Healthcare · New York
- David (Wenbo) Zhu@david_w_zhuFounder · Hey ReviaS24B2B · San Francisco
- Chris Le@chriiisleFounder · PaxS24B2B · San Francisco
- Julia Wu@thejuliawuFounder/CEO · SparkW24B2B
- Pranjal Daga@pranjaldaga1Founder · AccendS23Fintech
- Yutong PeiFounder · AccendS23Fintech
- Brandon Ballinger@bballingerFounder · Empirical HealthS23Healthcare · New York
- Kushal Byatnal@kushalbyatnalFounder · ExtendW23B2B · New York
- Kian Hooshmand@kianhooshmandFounder · VocodeW23B2B · San Francisco
- Thomas Maremaa@thomasmaremaaFounder · EncuadradoS21B2B · Santiago
- Justin KoFounder · OpkitS21Healthcare · New York
- Sherwood Callaway@shcallawayFounder/CEO · OpkitS21Healthcare · New York
- Lydia Han@lydiajhanFounder · ModernLoopW21B2B · San Francisco
- Pedro FranceschiFounder · BrexW17Fintech · San Francisco
FOUNDERROLEBATCHINDUSTRYLOCATIONTEAMX_url
Sherwood CallawaySazabi2× YCFounder/CEOSpring 2026B2BSan Francisco, United States10https://x.com/shcallawaySam KaplanRemixFounder/CEOWinter 2026ConsumerSan Francisco, United States0https://x.com/samrkaplanThomas Cesare-HerriauSpotPayFounder/CTOWinter 2026FintechSan Francisco, United States2—Nishant HoodaDocketFounder/CTOSpring 2025B2BSan Francisco, United States2—Sukhjit SinghSennu AIFounder/CEOWinter 2025B2BSan Francisco, United States2https://x.com/ssinghh14Benjamin PaikAfternoon.coFounder/CPOFall 2024B2BNew York, United States4—Gokul KumarresenAsha HealthFounder/CTOFall 2024HealthcareNew York, United States9https://x.com/GokulKumarresenDavid (Wenbo) ZhuHey ReviaFounderSummer 2024B2BSan Francisco, United States4https://x.com/david_w_zhuChris LePaxFounderSummer 2024B2BSan Francisco, United States10https://x.com/chriiisleJulia WuSparkFounder/CEOWinter 2024B2BUnknown5https://x.com/thejuliawuPranjal DagaAccendFounderSummer 2023FintechUnknown18https://x.com/pranjaldaga1Yutong PeiAccendFounderSummer 2023FintechUnknown18—Brandon BallingerEmpirical HealthFounderSummer 2023HealthcareNew York, United States4https://x.com/bballingerKushal ByatnalExtendFounderWinter 2023B2BNew York, United States25https://x.com/kushalbyatnalKian HooshmandVocodeFounderWinter 2023B2BSan Francisco, United States3https://x.com/kianhooshmandThomas MaremaaEncuadradoFounderSummer 2021B2BSantiago, Chile3https://x.com/thomasmaremaaJustin KoOpkitFounderSummer 2021HealthcareNew York, United States——Sherwood CallawayOpkit2× YCFounder/CEOSummer 2021HealthcareNew York, United States—https://x.com/shcallawayLydia HanModernLoopFounderWinter 2021B2BSan Francisco, United States15https://x.com/lydiajhanPedro FranceschiBrexFounderWinter 2017FintechSan Francisco, United States1000—
Showing 1–20 of 22 founders
Raquel Rodriguez Martinez
Founder·Empirical Health
PRIMARY INFO
RoleFounder· not in title
Team size4
BatchSummer 2023
LocationNew York, United States
Company statusActive
StageEarly
BIO
Physician | Health Technology | Co-founder at Empirical Health | Previously Assistant Clinical Professor at UCSF & Family Medicine at Kaiser
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.
CredentialsMD
DisciplineResearcherKeyword match from the bio text, not a classifier.
TRACK RECORD
First YC company on record
COMPANY CONTEXT
Empirical Health
Don't die of heart disease. Empirical is the first AI-native heart…
Co-foundersBrandon Ballinger@bballinger
