4x founder

Serafim Korablev

founder 21st.dev (YC W26)

Co-founder

21st· Winter 2026 🇺🇸 San Francisco, California, United States

in LinkedIn 𝕏 @serafimcloud

2024Co-founder· Cutly - AI Video Editor

Founder · since 2021

Company

Cutly - AI Video Editor

Role

Co-Founder, CEO

Stage

—

no public source

Raised

—

no public source

Based

Greater London, England, United Kingdom

Founder / co-founder — the company's markEmployee / research role

Source: LinkedIn work history

Profile coverage5 of 7 · missing posts, contact

21st

UI building blocks for the agentic internet

Winter 2026

Experience

Career

21st.dev
Co-founder
Co-founder, CEO · 2024 – Present
2024
⛽ Gas Pump
Co-founder
Co-Founder, CEO · 2024
2024
Cutly - AI Video Editor
Co-founder
Co-Founder, CEO · Greater London, England, United Kingdom · 2024
2024
Via Protocol
Co-founder
Co-founder, CEO · San-Francisco · 2021 – 2024
2021
Sunlight Brilliant
Chief Product Officer · Russia · 2019 – 2020
2019
Mgcom
Product Owner · Москва, Россия · 2018
2018
Mgcom
Project Manager · Москва, Россия · 2018
2018

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.