Founder Directory
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Founders30
Known for these resultsRole60%Role is parsed from founder titles in yc.db. Known for 60% 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-company40%Ex-company is matched from bios with employment context (ex-, formerly, worked at). 40% of these rows have at least one match.School100%School is matched from bios, case-sensitive for acronyms. 100% of these rows have at least one match.
- David HwangFounder/CEO · GrocaloS26Consumer · Los Angeles
- Carl Stauffer@carlstauffer_Founder/CEO · RiftenS26B2B · San Francisco
- Meer Patel@_meerpatelFounder/CEO · PranaW26Healthcare · San Francisco
- Abdelrahman HamimiFounder/CTO · Scheduling WizardW26Healthcare · Washington
- Samuel Oberly@samob917Founder/CEO · Scheduling WizardW26Healthcare · Washington
- Zachary DermodyFounder/COO · Scheduling WizardW26Healthcare · Washington
- Sydney KatzFounder/CTO · ValgoW26B2B · San Francisco
- Jonathan Miranda@jonathan_mir12Founder/CEO · CompyleF25B2B · San Francisco
- Kevin XieFounder/CEO · SorenF25B2B · San Francisco
- Shayaan EmranFounder/CTO · DeepGroveS25B2B · San Francisco
- Akhil GuptaFounder/CTO · FrescoF24Real Estate and Construction · San Francisco
- Derek ModzelewskiFounder/CTO · RewbiS24Industrials · San Francisco
- Thomas MargeFounder/CEO · RewbiS24Industrials · San Francisco
- Dave FeldmanFounder/CEO · GreenboardW24Fintech · New York
- Edward SchemborFounder/CTO · GreenboardW24Fintech · New York
- Soo Yung ChoFounder/CTO · PowderW24Fintech · San Francisco
- Ryan Chow@ryanchowwwFounder · MetalwareS23B2B · San Francisco
- Mark Yarchoan@markyarchoanFounder · Adventris PharmaceuticalsW23Healthcare · Baltimore
- Akash Mandavilli@AkashMandavill4Founder · GovEagleW23Government · New York
- Gabe Villasana@GabeVillasanaFounder · GovEagleW23Government · New York
FOUNDERROLEBATCHINDUSTRYLOCATIONTEAMX_url
David HwangGrocaloFounder/CEOSummer 2026ConsumerLos Angeles, United States0—Carl StaufferRiftenFounder/CEOSummer 2026B2BSan Francisco, United States0https://x.com/carlstauffer_Meer PatelPranaFounder/CEOWinter 2026HealthcareSan Francisco, United States4https://x.com/_meerpatelAbdelrahman HamimiScheduling WizardFounder/CTOWinter 2026HealthcareWashington, United States3—Samuel OberlyScheduling WizardFounder/CEOWinter 2026HealthcareWashington, United States3https://x.com/samob917Zachary DermodyScheduling WizardFounder/COOWinter 2026HealthcareWashington, United States3—Sydney KatzValgoFounder/CTOWinter 2026B2BSan Francisco, United States3—Jonathan MirandaCompyleFounder/CEOFall 2025B2BSan Francisco, United States2https://x.com/jonathan_mir12Kevin XieSorenFounder/CEOFall 2025B2BSan Francisco, United States——Shayaan EmranDeepGroveFounder/CTOSummer 2025B2BSan Francisco, United States3—Akhil GuptaFrescoFounder/CTOFall 2024Real Estate and ConstructionSan Francisco, United States2—Derek ModzelewskiRewbiFounder/CTOSummer 2024IndustrialsSan Francisco, United States3—Thomas MargeRewbi2× YCFounder/CEOSummer 2024IndustrialsSan Francisco, United States3—Dave FeldmanGreenboardFounder/CEOWinter 2024FintechNew York, United States26—Edward SchemborGreenboardFounder/CTOWinter 2024FintechNew York, United States26—Soo Yung ChoPowderFounder/CTOWinter 2024FintechSan Francisco, United States6—Ryan ChowMetalwareFounderSummer 2023B2BSan Francisco, United States4https://x.com/ryanchowwwMark YarchoanAdventris PharmaceuticalsFounderWinter 2023HealthcareBaltimore, United States7https://x.com/markyarchoanAkash MandavilliGovEagleFounderWinter 2023GovernmentNew York, United States25https://x.com/AkashMandavill4Gabe VillasanaGovEagleFounderWinter 2023GovernmentNew York, United States25https://x.com/GabeVillasana
Showing 1–20 of 30 founders
Thomas Marge
Founder·inBalance
PRIMARY INFO
RoleFounder· not in title
Team size10
BatchWinter 2021
LocationSan Francisco, United States
Company statusAcquired
StageEarly
BIO
Thomas is co-founder and CEO of Rewbi, which uses AI to optimize grid-connected battery storage. He previously founded inBalance, a YC W21 company, which was acquired by Stem (NYSE: STEM) in January of 2023. He led battery storage optimization and forecasting for Stem. He completed part of a Pure Mathematics PhD at University of Cambridge, which he left to build inBalance. He holds a Masters in Applied Mathematics and B.S.E. in Pure and Applied Mathematics from Johns Hopkins, graduating early.
Ex-company, school and discipline below are derived from this bio. Nothing is inferred when the bio is missing.
BACKGROUND
CredentialsPhD
DisciplineResearcherKeyword match from the bio text, not a classifier.
TRACK RECORD
2× YC founderSerial founder · self-declaredExit mentioned in bio
- W21inBalanceAcquired · this entry
- S24RewbiActive
COMPANY CONTEXT
inBalanceElectricity price forecasts for energy storage, ev charging, etc.
IndustryIndustrials
Websiteinbalanceresearch.com
Team size10
X—
LocationSan Francisco, United States
BatchWinter 2021
Also founded · 1 more YC company
RewbiActiveSummer 2024A stealth mode startup.
IndustrialsSan Francisco, United States3Open this entry
