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
Sherwood Callaway
Founder/CEO·Sazabi
PRIMARY INFO
RoleFounder/CEO
Team size10
BatchSpring 2026
LocationSan Francisco, United States
Company statusActive
StageEarly
BIO
Sherwood Callaway is a 2x YC founder and software engineer with over ten years of experience in infrastructure, DevOps, and observability engineering roles top VC-backed startups, including Crunchbase and Brex. Currently, he is founder and CEO at Sazabi, the AI-native observability platform for fast-moving engineering teams. Sazabi is directly inspired by Sherwood's experience at Brex, where helped start the company's infrastructure and observability engineering teams.
Ex-company, school and discipline below are derived from this bio. Nothing is inferred when the bio is missing.
BACKGROUND
Credentialsnone mentioned
DisciplineEngineerKeyword match from the bio text, not a classifier.
TRACK RECORD
2× YC founder
- S21OpkitInactive
- X26SazabiActive · this entry
COMPANY CONTEXT
SazabiThe AI-native observability platform for fast-moving engineering teams
Also founded · 1 more YC company
OpkitInactiveSummer 2021AI phone calls for the US healthcare industry
HealthcareNew York, United States—Open this entry
