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Add powerful communication features to your mobile app and data services for your backend<br> | PubNub makes it easy for you to add real-time capabilities to your apps, without worrying about the infrastructure. Build apps that allow your users to engage in real-time across mobile, browser, desktop and server. |
Chat/IM;User login/registration, SSO;Video Calling;Push Notifications;Voice/VOIP Calling;Content & Files;Location;Ratings;Custom objects | PubNub SDKs support over 50 of the most popular environments, including: iOS, Android, JavaScript, .NET, Java, Ruby, Python, PHP and many more.;Data Push - Establish and maintain persistent socket connections to any device (mobile, browser, desktop and server) and push data to global audiences in less than ¼ of a second;Presence - Automatically detect when users enter or leave your app and whether machines are online;Storage and Playback- Store your real-time data streams for future access, “playback” or re-publish;Mobile - Easily manage the complexity of real-time apps on mobile devices;Analytics - Simulate an audience of millions. See a live view of audience size, engagement and geography;Security - Protect your real-time data with easy to use enterprise-grade security |
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Stacks 29 | Stacks 249 |
Followers 107 | Followers 458 |
Votes 7 | Votes 238 |
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Firebase is a cloud service designed to power real-time, collaborative applications. Simply add the Firebase library to your application to gain access to a shared data structure; any changes you make to that data are automatically synchronized with the Firebase cloud and with other clients within milliseconds.

It enables real-time bidirectional event-based communication. It works on every platform, browser or device, focusing equally on reliability and speed.

Pusher is the category leader in delightful APIs for app developers building communication and collaboration features.

SignalR allows bi-directional communication between server and client. Servers can now push content to connected clients instantly as it becomes available. SignalR supports Web Sockets, and falls back to other compatible techniques for older browsers. SignalR includes APIs for connection management (for instance, connect and disconnect events), grouping connections, and authorization.

Ably offers WebSockets, stream resume, history, presence, and managed third-party integrations to make it simple to build, extend, and deliver digital realtime experiences at scale.

Chat API and SDK. With a beautiful UI Kit, easy to use React Components and powerful API. Add Chat to any application in a matter of hours. The tech uses Go, RocksDB and Raft. By the creators of Stream, the API that powers activity feeds for more than 300 million users.

Syncano is a backend platform to build powerful real-time apps more efficiently. Integrate with any API, minimize boilerplate code and control your data - all from one place.

SendBird is a Messaging SDK, Chat API, and fully managed chat infrastructure for your mobile apps and websites. Embeddable chat for iOS, Android, JavaScript, Unity, .NET.
Unlike traditional enterprise messaging systems, NATS has an always-on dial tone that does whatever it takes to remain available. This forms a great base for building modern, reliable, and scalable cloud and distributed systems.

SocketCluster is a fast, highly scalable HTTP + realtime server engine which lets you build multi-process realtime servers that make use of all CPU cores on a machine/instance. It removes the limitations of having to run your Node.js server as a single thread and makes your backend resilient by automatically recovering from worker crashes and aggregating errors into a central log.