Founder Directory
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Founders7
Known for these resultsRole100%Role is parsed from founder titles in yc.db. Known for 100% 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-company100%Ex-company is matched from bios with employment context (ex-, formerly, worked at). 100% of these rows have at least one match.School14%School is matched from bios, case-sensitive for acronyms. 14% of these rows have at least one match.
- Raj Jagiasi@raj_jagiasiFounder/CEO · Stratum IndustriesS26Government · New York
- Sergey Bunas@sergeybunasFounder/CTO · 21stW26B2B · San Francisco
- Alex AvnitFounder/CRO · PalomaS25B2B · San Francisco
- Nazli Danis@nazlidanisFounder/CEO · PalomaS25B2B · San Francisco
- Shubham Choudhary@techie_ShubhamFounder/CTO · FirstWorkS24B2B · San Francisco
- Alex Bouaziz@bouazizalexFounder/CEO · DeelW19B2B · San Francisco
- Nir SmadarFounder/CTO · AvoS18Consumer · Tel Aviv
FOUNDERROLEBATCHINDUSTRYLOCATIONTEAMX_url
Raj JagiasiStratum IndustriesFounder/CEOSummer 2026GovernmentNew York, United States2https://x.com/raj_jagiasiSergey Bunas21stFounder/CTOWinter 2026B2BSan Francisco, United States3https://x.com/sergeybunasAlex AvnitPalomaFounder/CROSummer 2025B2BSan Francisco, United States3—Nazli DanisPalomaFounder/CEOSummer 2025B2BSan Francisco, United States3https://x.com/nazlidanisShubham ChoudharyFirstWorkFounder/CTOSummer 2024B2BSan Francisco, United States9https://x.com/techie_ShubhamAlex BouazizDeelFounder/CEOWinter 2019B2BSan Francisco, United States5000https://x.com/bouazizalexNir SmadarAvoFounder/CTOSummer 2018ConsumerTel Aviv, Israel10—
Showing 1–7 of 7 founders
Serafim Korablev
Founder/CEO·21st
PRIMARY INFO
RoleFounder/CEO
Team size3
BatchWinter 2026
LocationSan Francisco, United States
Company statusActive
StageEarly
BIO
One of the first full-time vibe-coders (since October 2023). Co-founder of 21st.dev, a UI components registry with over 1m users. Previously co-founded Rork.com (then a web app builder for Next.js), the first Telegram-native memecoin launchpad (multi-million exit), and Via, a cross-chain crypto routing protocol with $1.5B GTV backed by Naval, Safe, Sandeep, and others. Passionate about design and basketball.
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
Serial founder · self-declared
COMPANY CONTEXT
21stUI building blocks for the agentic internet
Co-foundersSergey Bunas@sergeybunas
