# CollabKit > CollabKit is a developer SDK for adding real-time commenting and collaboration features to web applications. CollabKit is a developer SDK that enables product teams to embed real-time commenting, mentions, and collaboration features directly into their web applications. It provides pre-built React components and a backend infrastructure so developers can ship collaborative experiences without building from scratch. CollabKit handles the complexity of real-time sync, notifications, and user identity so teams can focus on their core product. - **Pre-built React Components** — *Drop in ready-made UI components like comment threads, popovers, and inboxes with minimal configuration.* - **Real-time Sync** — *All comments and activity update instantly across users using CollabKit's managed backend infrastructure.* - **Mentions & Notifications** — *Built-in @mention support and notification system to keep collaborators informed of relevant activity.* - **Customizable Theming** — *Style components to match your product's design system using CSS variables and theming APIs.* - **User Identity Integration** — *Bring your own authentication; CollabKit integrates with your existing user system to attribute comments correctly.* - **Inbox & Activity Feed** — *Provide users with a centralized view of all their unread comments and activity across the application.* - **Easy Setup** — *Install via npm, initialize with your API key, and wrap your app with the CollabKit provider to get started quickly.* - **Headless Mode** — *Use CollabKit's data layer without the default UI for fully custom collaboration experiences.* ## Features - Real-time commenting - Mentions and notifications - Pre-built React components - Customizable theming - User identity integration - Inbox and activity feed - Headless mode - Managed backend infrastructure ## Integrations React ## Platforms WEB, API, DEVELOPER_SDK ## Pricing Freemium — Free tier available with paid upgrades ## Links - Website: https://www.collabkit.dev - Documentation: https://www.collabkit.dev/docs - EveryDev.ai: https://www.everydev.ai/tools/collabkit