Apps similar to Pusher include Supabase, which is open source with a free version. Other options are PocketBase, TrailBase, Firebase and Sockudo. You're spoiled for choice with Backend as a Service like Pusher: we list more than 25 alternatives for Mac, Linux, the web, Windows and self-hosting.
MirrorFly is customizable in-app communication SDKs for businesses to integrate chat, voice, video calling and video conferencing features on their existing web and mobile applications.
India
Robin lets you ship superior in-app messaging experience without having to do the tedious work. Building 1-1 / group messaging can get complex, we have done the hard work so you never have to.
United States
Lightstreamer is a server for delivering real-time messages to browser-based and mobile applications, using WebSockets and HTTP. Features include dynamic throttling, bandwidth and frequency control, delta delivery, and total control over security and the quality of service.
Rapid.io is a cloud-hosted service that allows app developers to build realtime user interfaces without having to worry about the underlying infrastructure. It works as a non-relational data store accessible from client-side code.
Apphitect IM Solution is a readymade instant messaging solution equipped to develop real-time chat apps that are capable of multiple modes of communication, organization, security and scalability.
Pushpin is a reverse proxy server that makes it easy to implement WebSocket, HTTP streaming, and HTTP long-polling services. The project is unique among realtime push solutions in that it is designed to address the needs of API creators.
Nchan is a scalable, configurable pub/sub server for the modern web, built as a module for the Nginx web server. Dead simple REST API, super flexible configuration.
Flexible DataSync is a BAAS with a complete client framework. Developers can build real-time applications and communication services and deploy them easily
SendBird is messaging-as-a-service. It provides the client SDK, chat API, and the backend for apps enabling real-time communication among apps’ own users.
United States
Hotsock is a fully-private service that powers real-time functionality in your web and mobile apps, installed serverlessly in your own AWS account.
Kuzzle is a high performance open source, on premise and cloud agnostic backend for IoT and modern apps featuring CRUD, real-time notifications, authentication, geofencing, a full featured cluster mode and more.
atmosphere - Realtime Client Server Framework for the JVM, supporting WebSockets and Cross-Browser Fallbacks Support
Italy
EU
France