Founder Directory
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Founders17
Known for these resultsRole59%Role is parsed from founder titles in yc.db. Known for 59% 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-company18%Ex-company is matched from bios with employment context (ex-, formerly, worked at). 18% of these rows have at least one match.School59%School is matched from bios, case-sensitive for acronyms. 59% of these rows have at least one match.
- Jonas GruetterFounder/CEO · GripS26Industrials · Zürich
- Stanislaw PiaseckiFounder/CTO · GripS26Industrials · Zürich
- Dev KarpeFounder/COO · Praxis RoboticsS26Industrials · San Francisco
- Rohan Seelamsetty@ro_seelamsettyFounder/CEO · Praxis RoboticsS26Industrials · San Francisco
- Tommy LiFounder/CTO · Praxis RoboticsS26Industrials · San Francisco
- Abraham Heifets@AbeHeifetsFounder/CEO · WonderTxS26Healthcare · San Francisco
- Mahmoud Al-Madi@mahmoudalmadi_Founder/CEO · CyberdeskS25B2B · San Francisco
- Jannik Grothusen@JannikGrothusenFounder/CEO · The Robot Learning CompanyX25Industrials
- Will Cray@willcloudcrayFounder/CTO · MaiveW25B2B · San Francisco
- Jesse HuFounder · AbundantF24B2B · San Francisco
- Ke HuangFounder · AbundantF24B2B · San Francisco
- Meji AbidoyeFounder · AbundantF24B2B · San Francisco
- Adithya RamanathanFounder · BuzzleS21B2B · Philadelphia
- Bhairav MehtaFounder · BuzzleS21B2B · Philadelphia
- Michael StauntonFounder · BuzzleS21B2B · Philadelphia
- Udayan Umapathi@uday1489Founder · Volta Labs, Inc.W19Healthcare · Boston
- Abraham Heifets@AbeHeifetsFounder/CEO · Numerion LabsW15Healthcare · San Francisco
FOUNDERROLEBATCHINDUSTRYLOCATIONTEAMX_url
Jonas GruetterGripFounder/CEOSummer 2026IndustrialsZürich, Switzerland4—Stanislaw PiaseckiGripFounder/CTOSummer 2026IndustrialsZürich, Switzerland4—Dev KarpePraxis RoboticsFounder/COOSummer 2026IndustrialsSan Francisco, United States3—Rohan SeelamsettyPraxis RoboticsFounder/CEOSummer 2026IndustrialsSan Francisco, United States3https://x.com/ro_seelamsettyTommy LiPraxis RoboticsFounder/CTOSummer 2026IndustrialsSan Francisco, United States3—Abraham HeifetsWonderTx2× YCFounder/CEOSummer 2026HealthcareSan Francisco, United States3https://x.com/AbeHeifetsMahmoud Al-MadiCyberdeskFounder/CEOSummer 2025B2BSan Francisco, United States2https://x.com/mahmoudalmadi_Jannik GrothusenThe Robot Learning CompanyFounder/CEOSpring 2025IndustrialsUnknown1https://x.com/JannikGrothusenWill CrayMaiveFounder/CTOWinter 2025B2BSan Francisco, United States2https://x.com/willcloudcrayJesse HuAbundantFounderFall 2024B2BSan Francisco, United States7—Ke HuangAbundantFounderFall 2024B2BSan Francisco, United States7—Meji AbidoyeAbundantFounderFall 2024B2BSan Francisco, United States7—Adithya RamanathanBuzzleFounderSummer 2021B2BPhiladelphia, United States3—Bhairav MehtaBuzzle2× YCFounderSummer 2021B2BPhiladelphia, United States3—Michael StauntonBuzzleFounderSummer 2021B2BPhiladelphia, United States3—Udayan UmapathiVolta Labs, Inc.FounderWinter 2019HealthcareBoston, United States50https://x.com/uday1489Abraham HeifetsNumerion Labs2× YCFounder/CEOWinter 2015HealthcareSan Francisco, United States67https://x.com/AbeHeifets
Showing 1–17 of 17 founders
Johan Mathe
Founder·Atmo
PRIMARY INFO
RoleFounder· not in title
Team size10
BatchWinter 2020
LocationSan Francisco, United States
Company statusActive
StageGrowth
BIO
As co-founder and CTO of Atmo, Johan spearheads groundbreaking advancements in climate and weather science, leveraging AI, applied mathematics, and distributed systems. His lifelong mission is to bring applied mathematics and AI to the physical sciences. His expertise is backed by an 8-year tenure at Google, including Google X's Project Loon, where he lead critical efforts in the planning and simulation, and as a founding team member of Caption Health (acq. 2023) and Apollo Fusion (IPO 2021).
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
First YC company on record
