21st
ActiveInfrastructure and UI building blocks for the agentic internet
About
21st.dev is the largest React component registry for AI applications, used by 2M developers (370K MAU). We provide the building blocks to create AI agents and agent-powered apps: UI components, agent templates, and an SDK with built-in UI, tools, memory, observability, and managed infrastructure.
Founders · 2
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.
CS dropout. Senior Software Engineer at Deel (W19). Built Perplexity before Perplexity (Suggesty, 2022 — #1 Product Hunt, featured in Google's internal newsletter). Solo-built a Figma competitor pre-AI (Stage, 10K users). Cambridge AI hackathon winner (solo)
Launch
The production layer for shipping frontier AI agents inside your product - sandboxing, streaming, billing, UI, and observability out of the box.
21st.dev launches 21st Agents SDK, a production layer for frontier AI agents. It lets developers define an agent in TypeScript, deploy with a single command, and manage a hosted, sandboxed agent with streaming, billing, observability, and a UI, targeting teams building AI agents (Claude Code, Codex, and others) into products.
Formerly “21st”, “1code by 21st.dev”, “1code (21st.dev)”, “1code (ex: 21st.dev)”, “1code (21st.dev)”, “21st.dev”
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