Orchestration layer for coding agents
Infrastructure and UI building blocks for the agentic internet
A control panel for your AI coding agents. Run Claude Codes in parallel locally or in remote sandboxes, automate Linear tasks, PR reviews for teams that ship fast
21st.dev is the largest React component registry for AI applications, used by 1.4M developers (200K 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.
Pivoted from control panel for AI coding agents to React component registry and SDK for building AI applications - shifted from orchestrating code agents to providing UI/infrastructure components for developers building AI apps.