Founder Directory
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Founders279
Known for these resultsRole47%Role is parsed from founder titles in yc.db. Known for 47% 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.Bio80%Bio coverage: 80% 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-company23%Ex-company is matched from bios with employment context (ex-, formerly, worked at). 23% 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.
- Alex Hyungwoo NohFounder/COO · 6thSenseS26Industrials · San Francisco
- Alex Southmayd@alexsouthmaydFounder/CEO · BloomyS26Education · San Francisco
- Alexander HalpernFounder · DreamS26B2B · San Francisco
- Ryland Birchmeier@rylandbirchFounder · DreamS26B2B · San Francisco
- Alex YeeFounder/CTO · GrocaloS26Consumer · Los Angeles
- Simon AlexanderFounder/CTO · HilstartS26Industrials · San Francisco
- Alex Wilcox@alxwlcxFounder/CTO · InkboxS26B2B · San Francisco
- Alexander Risio@alexrisioFounder/CTO · RisklyticsS26Fintech · San Francisco
- Alexander Urbanski@urban_alex42Founder · UltrasoniumS26Industrials · Boston
- Alex Tung@alexytungFounder/CEO · WhitespaceS26B2B · San Francisco
- William AlexanderFounder/CEO · ArzanaX26B2B · New York
- Nicholas Donahue@PrimalNickFounder/CEO · DraftedX26Consumer · San Francisco
- Alexandre Combes@alexcmbs17Founder/CTO · FoasterX26B2B · San Francisco
- Raphaël Dabadie@RaphaelDabadieFounder/CEO · FoasterX26B2B · San Francisco
- Alex MusyFounder/CEO · HuscarlX26Fintech · San Francisco
- Pierre-Alexandre Kamienny@pierrealexaiFounder/CEO · KinroX26Fintech · San Francisco
- Alexander BergholmFounder/CTO · KlarifyX26Healthcare · San Francisco
- Alex LiuFounder/CTO · KorsoX26B2B · Irvine
- Alexander Liteplo@AlexanderTw33tsFounder/CEO · RentAHumanX26Consumer · San Francisco
- Alexis Aftalion@alexisaftalionFounder/CEO · StandoutX26B2B · San Francisco
FOUNDERROLEBATCHINDUSTRYLOCATIONTEAMX_url
Alex Hyungwoo Noh6thSenseFounder/COOSummer 2026IndustrialsSan Francisco, United States4—Alex SouthmaydBloomyFounder/CEOSummer 2026EducationSan Francisco, United States1https://x.com/alexsouthmaydAlexander HalpernDreamFounderSummer 2026B2BSan Francisco, United States2—Ryland BirchmeierDreamFounderSummer 2026B2BSan Francisco, United States2https://x.com/rylandbirchAlex YeeGrocaloFounder/CTOSummer 2026ConsumerLos Angeles, United States0—Simon AlexanderHilstartFounder/CTOSummer 2026IndustrialsSan Francisco, United States0—Alex WilcoxInkboxFounder/CTOSummer 2026B2BSan Francisco, United States3https://x.com/alxwlcxAlexander RisioRisklyticsFounder/CTOSummer 2026FintechSan Francisco, United States2https://x.com/alexrisioAlexander UrbanskiUltrasoniumFounderSummer 2026IndustrialsBoston, United States5https://x.com/urban_alex42Alex TungWhitespaceFounder/CEOSummer 2026B2BSan Francisco, United States2https://x.com/alexytungWilliam AlexanderArzanaFounder/CEOSpring 2026B2BNew York, United States6—Nicholas DonahueDrafted2× YCFounder/CEOSpring 2026ConsumerSan Francisco, United States9https://x.com/PrimalNickAlexandre CombesFoasterFounder/CTOSpring 2026B2BSan Francisco, United States2https://x.com/alexcmbs17Raphaël DabadieFoasterFounder/CEOSpring 2026B2BSan Francisco, United States2https://x.com/RaphaelDabadieAlex MusyHuscarlFounder/CEOSpring 2026FintechSan Francisco, United States2—Pierre-Alexandre KamiennyKinroFounder/CEOSpring 2026FintechSan Francisco, United States3https://x.com/pierrealexaiAlexander BergholmKlarifyFounder/CTOSpring 2026HealthcareSan Francisco, United States4—Alex LiuKorsoFounder/CTOSpring 2026B2BIrvine, United States3—Alexander LiteploRentAHumanFounder/CEOSpring 2026ConsumerSan Francisco, United States3https://x.com/AlexanderTw33tsAlexis AftalionStandoutFounder/CEOSpring 2026B2BSan Francisco, United States5https://x.com/alexisaftalion
Showing 1–20 of 279 founders
Hunter Brown
Founder·Ultrasonium
PRIMARY INFO
RoleFounder· not in title
Team size5
BatchSummer 2026
LocationBoston, United States
Company statusActive
StageEarly
BIO
Founder & VP, Engineering at Ultrasonium Started my R&D career working at national labs by age 15. I have contributed to the ITER fusion reactor and CERN through labs at NHFML and LBNL. I have led teams of fabricators and designers in both research and industry. I am passionate about hard tech and moving groundbreaking research ideas into real products. I lead the Ultrasonium team on the novel and cutting edge technology we implement in our manufacturing process.
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
First YC company on record
COMPANY CONTEXT
UltrasoniumManufacturing the metal parts the world runs on faster, cheaper, safer
