Our Story | 21st.dev

We're Serafim and Sergey. In the last 10 months we've built and launched 9 products, getting over 1 million total users, and 10k GitHub stars.

It started with 21st.dev — a home for UI components. Amazing libraries like Magic UI, Aceternity, and Motion Primitives were scattered across the web. We built one place where all of it lives.

Then we built Magic MCP — an AI agent that generates shadcn-style components inside Cursor and other AI IDEs. It quickly became a favorite among developers.

We got into Y Combinator W26 and built 1Code — a control panel for AI coding agents. Run multiple Claude Codes in parallel, locally or in remote sandboxes with live previews. Automate Linear tasks, PR reviews, QA — for teams that ship fast.

Open source, built for teams that ship 10x faster with AI agents.