scaledrone.com
Hosted pub/sub over WebSockets for sending live events between clients.
More in Realtime and WebRTC
AblyPub/sub realtime messaging with presence, message history and delivery guarantees.3M messages/mo
Cloudflare TURNManaged TURN relay for WebRTC peers that cannot connect directly.1 TB egress/mo
ConnectyCubeSDKs and backend for in-app chat, peer-to-peer calls, attachments and push messages.1,000 users
PubNubRealtime pub/sub messaging and mobile push with SDKs for Swift, Kotlin and React.1M transactions/mo
PusherHosted WebSocket channels for pushing live updates to browsers and apps.100 concurrent connections
simperium.comData sync service that keeps structured data in step across platforms and clients.2,500 users/moStreamAPIs and SDKs for adding chat, video, audio and activity feeds to apps.
Tencent RTCTencent's audio and video calling SDKs and APIs for group calls.10,000 minutes/mo