21st

Infrastructure and UI building blocks for the agentic internet

B2Bローンチ 2025年12月11日

21st とは？

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.

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