--- description: Build live audio, video, and data applications with Cloudflare Realtime, or broadcast live video with Stream. title: Cloudflare Realtime image: https://developers.cloudflare.com/og-docs.png --- [Skip to content](#main-content) > Documentation Index > Fetch the complete documentation index at: https://developers.cloudflare.com/realtime/llms.txt > Use this file to discover all available pages before exploring further. # Cloudflare Realtime Last updated Sep 22, 2026|Copy as Markdown| [View as Markdown](https://developers.cloudflare.com/realtime/index.md)| [Agent setup](https://developers.cloudflare.com/agent-setup/) Build live applications where people, AI systems, and devices communicate in real time over [Cloudflare's global network ↗︎](https://www.cloudflare.com/network/). ![](https://developers.cloudflare.com/cdn-cgi/image/onerror=redirect,width=1400,height=799,format=webp/_astro/global-web-rtc-network.vo5ylKmC.png)![](https://developers.cloudflare.com/cdn-cgi/image/onerror=redirect,width=1400,height=799,format=webp/_astro/global-web-rtc-network-dark.DktEEERJ.png) [RealtimeKit

Add audio or video calls to your app

Use prebuilt meeting UI and SDKs for web and mobile. Add managed recording or transcription if your app needs it.Explore RealtimeKit](https://developers.cloudflare.com/realtime/realtimekit/) [Realtime SFU

Build custom WebRTC applications

Use the Realtime SFU API to control which endpoints publish or receive audio, video, and data. Your application handles signaling and permissions.Explore Realtime SFU](https://developers.cloudflare.com/realtime/sfu/) ## What you can build [RealtimeKit

In-app meetings

Add audio or video calls to your web or mobile app with prebuilt screens and controls.View guide](https://developers.cloudflare.com/realtime/realtimekit/quickstart/) [RealtimeKit

Virtual classrooms

Set instructor and student permissions, then split a class into breakout rooms. Record or transcribe sessions when needed.View guide](https://developers.cloudflare.com/realtime/realtimekit/ui-kit/breakout-rooms/) [RealtimeKit

Live events

Add reactions, chat, and polls to a live event.View guide](https://developers.cloudflare.com/realtime/realtimekit/webinar/) [Realtime SFU

Embedded devices

Send audio and telemetry from an ESP32 to browsers, with controls for one authorized operator. Use the same design for robot gateways.View guide](https://developers.cloudflare.com/realtime/sfu/examples/embedded-devices/) [Realtime SFU

Cloud gaming

Stream a game from a Container to browsers, then send keyboard and pointer input back over DataChannels.View guide](https://developers.cloudflare.com/realtime/sfu/examples/cloud-gaming/) [Realtime SFU

AI audio pipelines

Transcribe microphone audio with Workers AI, then send generated speech to browsers through WebSocket media adapters.View guide](https://developers.cloudflare.com/realtime/sfu/examples/ai-audio/) ## Realtime primitives ### [Cloudflare TURN](https://developers.cloudflare.com/realtime/turn/) Relay WebRTC traffic through Cloudflare when a NAT or firewall prevents a direct connection. ### [WebSocket adapter](https://developers.cloudflare.com/realtime/sfu/features/media-transport-adapters/websocket-adapter/) In beta. Send PCM audio in either direction between Realtime SFU and a WebSocket service, or send JPEG video to the service. ### [DataChannels](https://developers.cloudflare.com/realtime/sfu/features/datachannels/) Exchange chat, sensor updates, and control events between WebRTC endpoints. ## Frequently asked questions ### Should I use RealtimeKit or Realtime SFU? If you are new to [WebRTC ↗︎](https://www.cloudflare.com/learning/video-streaming/how-webrtc-works/) and want to add audio or video meetings to your app, use [RealtimeKit](https://developers.cloudflare.com/realtime/realtimekit/). It includes [web and mobile SDKs](https://developers.cloudflare.com/realtime/realtimekit/sdk-selection/) with [prebuilt UI](https://developers.cloudflare.com/realtime/realtimekit/ui-kit/). Cloudflare handles signaling and media routing, and you can add managed [recording](https://developers.cloudflare.com/realtime/realtimekit/recording-guide/) or [transcription](https://developers.cloudflare.com/realtime/realtimekit/ai/transcription/). If you have WebRTC experience and need control over [what each endpoint publishes or receives](https://developers.cloudflare.com/realtime/sfu/concepts/sessions-tracks/), use [Realtime SFU](https://developers.cloudflare.com/realtime/sfu/). Your application handles [signaling, permissions, session state, and track discovery](https://developers.cloudflare.com/realtime/sfu/concepts/architecture/). Cloudflare runs the SFU and forwards media to subscribers. ### How does TURN fit into WebRTC? A [TURN server](https://developers.cloudflare.com/realtime/turn/what-is-turn/) relays traffic when a NAT or firewall prevents two WebRTC endpoints from connecting directly. If a direct connection works, TURN stays out of the path. RealtimeKit configures [Cloudflare TURN](https://developers.cloudflare.com/realtime/turn/) for you. Realtime SFU includes access to the same service. You can also use Cloudflare TURN with your own SFU or peer-to-peer application by [generating TURN credentials](https://developers.cloudflare.com/realtime/turn/generate-credentials/). Cloudflare TURN uses [Anycast ↗︎](https://www.cloudflare.com/learning/cdn/glossary/anycast-network/), so you do not have to deploy regional TURN servers or load balancers. ### For webinars, should I use RealtimeKit or Stream Live? Use [RealtimeKit webinars](https://developers.cloudflare.com/realtime/realtimekit/webinar/) when attendees join as participants. They might speak, appear on camera, or move into [breakout rooms](https://developers.cloudflare.com/realtime/realtimekit/ui-kit/breakout-rooms/). Use [Stream Live](https://developers.cloudflare.com/stream/stream-live/) when a small group of presenters broadcasts and the audience mainly watches. For example, a webinar with a few presenters and a large watch-only audience should use Stream Live. ## Next steps ### [Get started with RealtimeKit](https://developers.cloudflare.com/realtime/realtimekit/quickstart/) Create your first meeting and add RealtimeKit to your app. ### [Get started with Realtime SFU](https://developers.cloudflare.com/realtime/sfu/get-started/) Create an application, open an SFU session, and publish a media track. Was this helpful? YesNo ## On this page [![](https://developers.cloudflare.com/_astro/logo.te5VL_aD.svg)Docs](https://developers.cloudflare.com/) ```json {"@context":"https://schema.org","@type":"WebPage","@id":"https://developers.cloudflare.com/realtime/#page","headline":"Cloudflare Realtime","description":"Build live audio, video, and data applications with Cloudflare Realtime, or broadcast live video with Stream.","url":"https://developers.cloudflare.com/realtime/","inLanguage":"en","image":"https://developers.cloudflare.com/og-docs.png","dateModified":"2026-09-22","publisher":{"@type":"Organization","name":"Cloudflare","description":"One platform for your apps, agents, and workforce. 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