Founder Directory
Built by Keitoto
Founders36
Known for these resultsRole33%Role is parsed from founder titles in yc.db. Known for 33% 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.Bio86%Bio coverage: 86% 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-company31%Ex-company is matched from bios with employment context (ex-, formerly, worked at). 31% 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.
- Robert HouFounder/CEO · AlchemizeX26B2B · San Francisco
- Samuel Fu@samuelsfuFounder/CTO · AlchemizeX26B2B · San Francisco
- Oscar AdamssonFounder/CPO · StiltaW26B2B · Stockholm
- Oskar Block@oskarblockFounder/CEO · StiltaW26B2B · Stockholm
- Petrus WernerFounder/CTO · StiltaW26B2B · Stockholm
- Tobias Estreen@estreenxFounder · StiltaW26B2B · Stockholm
- Dima Yanovsky@yanovskydFounder · ProxF25B2B · San Francisco
- Gregory Makodzeba@youfelllFounder · ProxF25B2B · San Francisco
- Farhan Hossain@FarhanBuildsFounder · BlueS25Consumer · San Francisco
- Omar Abdelaziz@OmarAbcXyz123Founder/CEO · BlueS25Consumer · San Francisco
- Peter KroghFounder · BlueS25Consumer · San Francisco
- Akhil GuptaFounder/CTO · FrescoF24Real Estate and Construction · San Francisco
- Arvind VeluvaliFounder/CEO · FrescoF24Real Estate and Construction · San Francisco
- Konstantin Hohr@hkonsti_Founder · MidrenderS23B2B · San Francisco
- Naxin WangFounder · Obento HealthS23Healthcare · San Francisco
- Jason Rudin@jasonrudinFounder · CladW23Real Estate and Construction · New York
- Gabriel SaruhashiFounder · Emerge CareerS22Education · New York
- Daniel HavenFounder · Slauth.ioS22B2B · Tel Aviv
- Mads Schmidt Petersen@MadsTrundteFounder · HippoBuildW22Real Estate and Construction · Bogotá
- Francis Wong@packetedFounder · AuricleW21Healthcare · San Francisco
FOUNDERROLEBATCHINDUSTRYLOCATIONTEAMX_url
Robert HouAlchemizeFounder/CEOSpring 2026B2BSan Francisco, United States2—Samuel FuAlchemizeFounder/CTOSpring 2026B2BSan Francisco, United States2https://x.com/samuelsfuOscar AdamssonStiltaFounder/CPOWinter 2026B2BStockholm, Sweden4—Oskar BlockStiltaFounder/CEOWinter 2026B2BStockholm, Sweden4https://x.com/oskarblockPetrus WernerStiltaFounder/CTOWinter 2026B2BStockholm, Sweden4—Tobias EstreenStiltaFounderWinter 2026B2BStockholm, Sweden4https://x.com/estreenxDima YanovskyProxFounderFall 2025B2BSan Francisco, United States7https://x.com/yanovskydGregory MakodzebaProxFounderFall 2025B2BSan Francisco, United States7https://x.com/youfelllFarhan HossainBlueFounderSummer 2025ConsumerSan Francisco, United States6https://x.com/FarhanBuildsOmar AbdelazizBlueFounder/CEOSummer 2025ConsumerSan Francisco, United States6https://x.com/OmarAbcXyz123Peter KroghBlueFounderSummer 2025ConsumerSan Francisco, United States6—Akhil GuptaFrescoFounder/CTOFall 2024Real Estate and ConstructionSan Francisco, United States2—Arvind VeluvaliFrescoFounder/CEOFall 2024Real Estate and ConstructionSan Francisco, United States2—Konstantin HohrMidrenderFounderSummer 2023B2BSan Francisco, United States1https://x.com/hkonsti_Naxin WangObento HealthFounderSummer 2023HealthcareSan Francisco, United States2—Jason RudinCladFounderWinter 2023Real Estate and ConstructionNew York, United States7https://x.com/jasonrudinGabriel SaruhashiEmerge CareerFounderSummer 2022EducationNew York, United States8—Daniel HavenSlauth.ioFounderSummer 2022B2BTel Aviv, Israel4—Mads Schmidt PetersenHippoBuildFounderWinter 2022Real Estate and ConstructionBogotá, Colombia5https://x.com/MadsTrundteFrancis WongAuricleFounderWinter 2021HealthcareSan Francisco, United States2https://x.com/packeted
Showing 1–20 of 36 founders
Tobias Estreen
Founder·Stilta
PRIMARY INFO
RoleFounder· not in title
Team size4
BatchWinter 2026
LocationStockholm, Sweden
Company statusActive
StageEarly
BIO
Tobias is co-founder of Stilta. Previously at QuantumBlack (McKinsey & Company), he led teams developing agentic AI systems for global clients. He is a second-time founder with a background in physics and machine learning from KTH and KU Leuven, bringing deep technical expertise and a track record of building AI systems for complex, high-stakes environments.
Ex-company, school and discipline below are derived from this bio. Nothing is inferred when the bio is missing.
BACKGROUND
Credentialsnone mentioned
DisciplineEngineerKeyword match from the bio text, not a classifier.
TRACK RECORD
Serial founder · self-declared
COMPANY CONTEXT
Stilta
Agentic AI for intellectual property
