21st
Infrastructure and UI building blocks for the agentic internet
SaaS
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.
Open Roles
No open roles right now.
Verified Team
No verified team members yet.