Serafim's profile on Product Hunt

About

design engineer | founder 21st.dev | prev gaspump.tg (acq.) cutly.app (acq.) via.exchange leto.xyz

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Maker History

21stInfra and UI building blocks for the agentic internet
1CodeOpen source Cursor-like UI for Claude Code
Jan 2026
Phion.devBuild in Cursor like in Lovable - auto start, save & deploy
Jun 2025
ulu - telegram for devs and designersSuperhuman Inbox, Arc Folders, Workspaces, CMD+K, Raycast AI
Oct 2023
Leto - Payment Crypto WalletBest first crypto wallet | Fees in USD | Transfers via phone
Apr 2023

Forums

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12d ago

21st Agents SDK - SDK to add an Claude Code AI agent to your app

21st Agents SDK is the fastest way to add an AI agent to your app. Define your agent in TypeScript, deploy in one command, and embed a production-ready chat UI with . Built-in streaming, session management, usage billing, and observability — so you can focus on what makes your agent unique, not infrastructure. Backed by Y Combinator (W26).

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2mo ago

1Code - Open source Cursor-like UI for Claude Code

Whats 1Code? An app to run your Claude Code agents in parallel that works on Mac and Web. On Mac - run locally, with or without worktrees. On Web - run in remote sandboxes with live previews of your app, mobile included, so you can check on agents from anywhere. Running multiple Claude Codes in parallel dramatically sped up how we build features.

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8mo ago

21st.dev 2.0 - Create, remix and share UI components with AI

Why settle for one design, when you can start with five? With our new Magic Agent, you instantly get 5 unique component variants for any prompt — so you always find one you like, and you can instantly remix or micro-edit it in chat.