Founder Directory
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Founders23
Known for these resultsRole39%Role is parsed from founder titles in yc.db. Known for 39% 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.School9%School is matched from bios, case-sensitive for acronyms. 9% of these rows have at least one match.
- Ben Smith@imbensmithFounder/CEO · AsyncS26B2B · New York
- Connor ParkFounder/CTO · AsyncS26B2B · New York
- Prama Yudhistira@menace_codesFounder/CPO · ParameterW26B2B · San Francisco
- Mikkel KimFounder/CTO · argsS25B2B · New York
- Paul Bae@baepaulFounder/CEO · argsS25B2B · New York
- Mark DawsonFounder/CEO · HyrexS24B2B · San Francisco
- Trevor ReedFounder/CTO · HyrexS24B2B · San Francisco
- Alistair Pullen@AlistairPullenFounder · CosineW23B2B · London
- Yang Li@yangli_Founder · CosineW23B2B · London
- Charly Poly@whereischarlyFounder · DeferW23B2B · Paris
- Kapil BakshiFounder · Karate LabsW22B2B · Wilmington
- Peter Thomas@ptrthomasFounder · Karate LabsW22B2B · Wilmington
- Mauricio Morales@maomoralesFounder · DailybotS21B2B
- Sergio Florez@XergioAleXFounder · DailybotS21B2B
- Alex ZvanigaFounder · Ruta HealthS21B2B · San Francisco
- CG Chen@sizheeFounder · Ruta HealthS21B2B · San Francisco
- Derek R. ZhangFounder · Ruta HealthS21B2B · San Francisco
- Geordie GrahamFounder · Ruta HealthS21B2B · San Francisco
- Michiel Westerbeek@happylinksFounder · TellaS20B2B · Amsterdam
- Reilly Sweetland@rsweetlandFounder · FollowUpThenS17B2B · San Francisco
FOUNDERROLEBATCHINDUSTRYLOCATIONTEAMX_url
Ben SmithAsyncFounder/CEOSummer 2026B2BNew York, United States2https://x.com/imbensmithConnor ParkAsyncFounder/CTOSummer 2026B2BNew York, United States2—Prama YudhistiraParameterFounder/CPOWinter 2026B2BSan Francisco, United States11https://x.com/menace_codesMikkel KimargsFounder/CTOSummer 2025B2BNew York, United States2—Paul BaeargsFounder/CEOSummer 2025B2BNew York, United States2https://x.com/baepaulMark DawsonHyrexFounder/CEOSummer 2024B2BSan Francisco, United States3—Trevor ReedHyrexFounder/CTOSummer 2024B2BSan Francisco, United States3—Alistair PullenCosineFounderWinter 2023B2BLondon, United Kingdom12https://x.com/AlistairPullenYang LiCosineFounderWinter 2023B2BLondon, United Kingdom12https://x.com/yangli_Charly PolyDeferFounderWinter 2023B2BParis, France2https://x.com/whereischarlyKapil BakshiKarate LabsFounderWinter 2022B2BWilmington, United States2—Peter ThomasKarate LabsFounderWinter 2022B2BWilmington, United States2https://x.com/ptrthomasMauricio MoralesDailybotFounderSummer 2021B2BUnknown11https://x.com/maomoralesSergio FlorezDailybotFounderSummer 2021B2BUnknown11https://x.com/XergioAleXAlex ZvanigaRuta HealthFounderSummer 2021B2BSan Francisco, United States1—CG ChenRuta HealthFounderSummer 2021B2BSan Francisco, United States1https://x.com/sizheeDerek R. ZhangRuta HealthFounderSummer 2021B2BSan Francisco, United States1—Geordie GrahamRuta HealthFounderSummer 2021B2BSan Francisco, United States1—Michiel WesterbeekTellaFounderSummer 2020B2BAmsterdam, Netherlands6https://x.com/happylinksReilly SweetlandFollowUpThenFounderSummer 2017B2BSan Francisco, United States1https://x.com/rsweetland
Showing 1–20 of 23 founders
Bryan Frimin
Founder·Defer
PRIMARY INFO
RoleFounder· not in title
Team size2
BatchWinter 2023
LocationParis, France
Company statusInactive
StageEarly
BIO
CTO & Co-founder of Probo. French engineer building an open-source AI platform that simplifies SOC2/ISO27001 compliance.
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.
Credentialsnone mentioned
DisciplineEngineerKeyword match from the bio text, not a classifier.
TRACK RECORD
2× YC founder
- W23DeferInactive · this entry
- X25ProboActive
COMPANY CONTEXT
DeferZero infrastructure background processing platform.
Co-foundersCharly Poly@whereischarly
Also founded · 1 more YC company
ProboActiveSpring 2025We help you get compliant while you focus on your business.
B2BParis, France6Open this entry
