Founder Directory
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Founders59
Known for these resultsRole29%Role is parsed from founder titles in yc.db. Known for 29% 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.Bio78%Bio coverage: 78% 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-company10%Ex-company is matched from bios with employment context (ex-, formerly, worked at). 10% of these rows have at least one match.School22%School is matched from bios, case-sensitive for acronyms. 22% of these rows have at least one match.
- Emily Colman@emilyrcolmanFounder · RonanRx Inc.S26Healthcare · San Francisco
- Lloyd Armbrust@larmbrustFounder/CEO · RonanRx Inc.S26Healthcare · San Francisco
- Austin StoneFounder/CEO · Tell if AIF25B2B · Austin
- Ilariia Belova@ilariia_belovaFounder/CTO · Tell if AIF25B2B · Austin
- Baptiste Debever@baptistedebeverFounder/CTO · LucisX25Healthcare · Paris
- Max Berthelot@Iam_maxbFounder/CEO · LucisX25Healthcare · Paris
- Joanne Wang@joannewang_Founder/CEO · Copper HealthW24Healthcare · San Francisco
- Brendan ByrneFounder · LifestyleRxS23Healthcare · White Rock
- Daniel PfingstgraefFounder · LifestyleRxS23Healthcare · White Rock
- Jack HilliardFounder · LifestyleRxS23Healthcare · White Rock
- Jason KerkvlietFounder · LifestyleRxS23Healthcare · White Rock
- Vaughn Koch@vaughnkochFounder/CTO · Kivo HealthW23Healthcare · San Francisco
- Victor SadauskasFounder · Kivo HealthW23Healthcare · San Francisco
- Carly AllenFounder · AlmondS22Healthcare · Los Angeles
- Tara RaffiFounder · AlmondS22Healthcare · Los Angeles
- Arjun Soin@arjunssoinFounder · ClinikallyS22Healthcare · Gurugram
- charlie bowmanFounder · Dr. TreatS22Healthcare · San Francisco
- Hetal ShahFounder · Dr. TreatS22Healthcare · San Francisco
- Rakesh TondonFounder · Dr. TreatS22Healthcare · San Francisco
- Arpit RaoFounder · Ankr HealthW22Healthcare · Houston
FOUNDERROLEBATCHINDUSTRYLOCATIONTEAMX_url
Emily ColmanRonanRx Inc.FounderSummer 2026HealthcareSan Francisco, United States5https://x.com/emilyrcolmanLloyd ArmbrustRonanRx Inc.2× YCFounder/CEOSummer 2026HealthcareSan Francisco, United States5https://x.com/larmbrustAustin StoneTell if AIFounder/CEOFall 2025B2BAustin, United States2—Ilariia BelovaTell if AIFounder/CTOFall 2025B2BAustin, United States2https://x.com/ilariia_belovaBaptiste DebeverLucisFounder/CTOSpring 2025HealthcareParis, France17https://x.com/baptistedebeverMax BerthelotLucisFounder/CEOSpring 2025HealthcareParis, France17https://x.com/Iam_maxbJoanne WangCopper HealthFounder/CEOWinter 2024HealthcareSan Francisco, United States2https://x.com/joannewang_Brendan ByrneLifestyleRxFounderSummer 2023HealthcareWhite Rock, Canada9—Daniel PfingstgraefLifestyleRxFounderSummer 2023HealthcareWhite Rock, Canada9—Jack HilliardLifestyleRxFounderSummer 2023HealthcareWhite Rock, Canada9—Jason KerkvlietLifestyleRxFounderSummer 2023HealthcareWhite Rock, Canada9—Vaughn KochKivo Health2× YCFounder/CTOWinter 2023HealthcareSan Francisco, United States40https://x.com/vaughnkochVictor SadauskasKivo HealthFounderWinter 2023HealthcareSan Francisco, United States40—Carly AllenAlmondFounderSummer 2022HealthcareLos Angeles, United States8—Tara RaffiAlmondFounderSummer 2022HealthcareLos Angeles, United States8—Arjun SoinClinikallyFounderSummer 2022HealthcareGurugram, India125https://x.com/arjunssoincharlie bowmanDr. TreatFounderSummer 2022HealthcareSan Francisco, United States21—Hetal ShahDr. TreatFounderSummer 2022HealthcareSan Francisco, United States21—Rakesh TondonDr. Treat2× YCFounderSummer 2022HealthcareSan Francisco, United States21—Arpit RaoAnkr HealthFounderWinter 2022HealthcareHouston, United States30—
Showing 1–20 of 59 founders
Lloyd Armbrust
Founder/CEO·RonanRx Inc.
PRIMARY INFO
RoleFounder/CEO
Team size5
BatchSummer 2026
LocationSan Francisco, United States
Company statusActive
StageEarly
BIO
2x YC founder. 3 Exits. 6 Kids. Built a $50M manufacturing business. Now building RonanRX. We use AI to personalize peptides and GLP1s like Ozempic to your biology. By combining labs, wearables, medical history, treatment response, and the latest research, we continuously personalize your treatment as your body changes. Peptides are like Claude Code for your body. Your biology is the prompt. Oldest founder in S26, raising six kids outside Austin, Texas.
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
DisciplineResearcherKeyword match from the bio text, not a classifier.
TRACK RECORD
2× YC founder
- W10OwnLocalActive
- S26RonanRx Inc.Active · this entry
COMPANY CONTEXT
RonanRx Inc.We use AI to personalize peptides to your biology
IndustryHealthcare
Websiteronanrx.com/
Team size5
X—
LocationSan Francisco, United States
BatchSummer 2026
Co-foundersEmily Colman@emilyrcolman
