Founder Directory
Built by Keitoto
Founders8
Known for these resultsRole50%Role is parsed from founder titles in yc.db. Known for 50% 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.Bio88%Bio coverage: 88% 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-company0%Ex-company is matched from bios with employment context (ex-, formerly, worked at). 0% of these rows have at least one match.School25%School is matched from bios, case-sensitive for acronyms. 25% of these rows have at least one match.
- Francisco Serra-Martins@FranciscoSerraMFounder/CEO · Isengard Industries IncS26Industrials · San Francisco
- James TennantFounder · Isengard Industries IncS26Industrials · San Francisco
- Ilia BaranovFounder/CTO · Polymath RoboticsS22Industrials · San Francisco
- Stefan Seltz-Axmacher@stefanesaFounder · Polymath RoboticsS22Industrials · San Francisco
- Norris TieFounder · Exosonic, Inc.W20Industrials · Los Angeles
- Tim MacDonaldFounder · Exosonic, Inc.W20Industrials · Los Angeles
- Daniel LoprettoFounder/CTO · Meter FeederW16Fintech · Pittsburgh
- Jim Gibbs@heezoFounder/CEO · Meter FeederW16Fintech · Pittsburgh
FOUNDERROLEBATCHINDUSTRYLOCATIONTEAMX_url
Francisco Serra-MartinsIsengard Industries IncFounder/CEOSummer 2026IndustrialsSan Francisco, United States30https://x.com/FranciscoSerraMJames TennantIsengard Industries IncFounderSummer 2026IndustrialsSan Francisco, United States30—Ilia BaranovPolymath RoboticsFounder/CTOSummer 2022IndustrialsSan Francisco, United States13—Stefan Seltz-AxmacherPolymath Robotics2× YCFounderSummer 2022IndustrialsSan Francisco, United States13https://x.com/stefanesaNorris TieExosonic, Inc.FounderWinter 2020IndustrialsLos Angeles, United States14—Tim MacDonaldExosonic, Inc.FounderWinter 2020IndustrialsLos Angeles, United States14—Daniel LoprettoMeter FeederFounder/CTOWinter 2016FintechPittsburgh, United States4—Jim GibbsMeter FeederFounder/CEOWinter 2016FintechPittsburgh, United States4https://x.com/heezo
Showing 1–8 of 8 founders
Tim MacDonald
Founder·Exosonic, Inc.
PRIMARY INFO
RoleFounder· not in title
Team size14
BatchWinter 2020
LocationLos Angeles, United States
Company statusInactive
StageEarly
BIO
Co-founder of supersonic aircraft startup.
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
Disciplinenot detectedKeyword match from the bio text, not a classifier.
TRACK RECORD
First YC company on record
COMPANY CONTEXT
Exosonic, Inc.Developing supersonic UAVs as a pathway to quiet supersonic flight
IndustryIndustrials
Websiteexosonic.com/
Team size14
LocationLos Angeles, United States
BatchWinter 2020
Co-foundersNorris Tie
