Founder Directory
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Founders38
Known for these resultsRole37%Role is parsed from founder titles in yc.db. Known for 37% 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.Bio92%Bio coverage: 92% 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-company21%Ex-company is matched from bios with employment context (ex-, formerly, worked at). 21% of these rows have at least one match.School32%School is matched from bios, case-sensitive for acronyms. 32% of these rows have at least one match.
- Aidan Tiruvan@AidanTiruvanFounder/CEO · ArchalS26B2B · San Francisco
- Anton Livaja@antonlivajaFounder/CEO · CautionS26B2B · George Town
- Ksenia Lesko@xenushFounder · CautionS26B2B · George Town
- Lance VickFounder/CTO · CautionS26B2B · George Town
- Eren Mendi@erenzmendi03Founder · ExpanseX26B2B · San Francisco
- Ismaeel Bashir@ismaeel_bashir_Founder/CEO · ExpanseX26B2B · San Francisco
- Nikodem Bieniek@nkdem_bFounder · ExpanseX26B2B · San Francisco
- Yafet Melake@yafet_melakeFounder · ExpanseX26B2B · San Francisco
- Raman VarmaFounder/CEO · Kestrel AIF25B2B · San Francisco
- Lucas EwingFounder/CEO · LilacS25B2B · San Francisco
- Ryan EwingFounder · LilacS25B2B · San Francisco
- Rohil KhareFounder · SigmanticAIS25B2B · San Francisco
- Dennis ZaxFounder/CTO · NaïveX25B2B · San Francisco
- Sean DorjeFounder/CEO · NaïveX25B2B · San Francisco
- Gabriel Ocana Santero@OcanaSanteroFounder/CEO · Exin TherapeuticsW25Healthcare · San Francisco
- Marko Tvrdic@markotvrdicFounder/COO · Exin TherapeuticsW25Healthcare · San Francisco
- Alex Confer@aconferFounder · RisottoW24B2B · San Francisco
- Aron SolbergFounder · RisottoW24B2B · San Francisco
- Chris PaulFounder · RisottoW24B2B · San Francisco
- Ned O'Leary@nedolearyFounder · TesseralW24B2B · San Francisco
FOUNDERROLEBATCHINDUSTRYLOCATIONTEAMX_url
Aidan TiruvanArchalFounder/CEOSummer 2026B2BSan Francisco, United States2https://x.com/AidanTiruvanAnton LivajaCautionFounder/CEOSummer 2026B2BGeorge Town, Cayman Islands5https://x.com/antonlivajaKsenia LeskoCautionFounderSummer 2026B2BGeorge Town, Cayman Islands5https://x.com/xenushLance VickCautionFounder/CTOSummer 2026B2BGeorge Town, Cayman Islands5—Eren MendiExpanseFounderSpring 2026B2BSan Francisco, United States4https://x.com/erenzmendi03Ismaeel BashirExpanseFounder/CEOSpring 2026B2BSan Francisco, United States4https://x.com/ismaeel_bashir_Nikodem BieniekExpanseFounderSpring 2026B2BSan Francisco, United States4https://x.com/nkdem_bYafet MelakeExpanseFounderSpring 2026B2BSan Francisco, United States4https://x.com/yafet_melakeRaman VarmaKestrel AIFounder/CEOFall 2025B2BSan Francisco, United States2—Lucas EwingLilacFounder/CEOSummer 2025B2BSan Francisco, United States4—Ryan EwingLilacFounderSummer 2025B2BSan Francisco, United States4—Rohil KhareSigmanticAIFounderSummer 2025B2BSan Francisco, United States2—Dennis ZaxNaïveFounder/CTOSpring 2025B2BSan Francisco, United States8—Sean DorjeNaïveFounder/CEOSpring 2025B2BSan Francisco, United States8—Gabriel Ocana SanteroExin TherapeuticsFounder/CEOWinter 2025HealthcareSan Francisco, United States9https://x.com/OcanaSanteroMarko TvrdicExin TherapeuticsFounder/COOWinter 2025HealthcareSan Francisco, United States9https://x.com/markotvrdicAlex ConferRisottoFounderWinter 2024B2BSan Francisco, United States3https://x.com/aconferAron SolbergRisottoFounderWinter 2024B2BSan Francisco, United States3—Chris PaulRisottoFounderWinter 2024B2BSan Francisco, United States3—Ned O'LearyTesseralFounderWinter 2024B2BSan Francisco, United States5https://x.com/nedoleary
Showing 1–20 of 38 founders
Ksenia Lesko
Founder·Caution
PRIMARY INFO
RoleFounder· not in title
Team size5
BatchSummer 2026
LocationGeorge Town, Cayman Islands
Company statusActive
StageEarly
BIO
Co-founder at Caution, where we help teams run sensitive workloads in secure enclaves and cryptographically prove what code is running in production. I lead the business and product side; previously ran strategy and ops at Distrust (distrust.co) and led customer education and activation at Ada (ada.cx).
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
CautionHosting platform for software you don't want to have hacked
