Firebase gives you the tools and infrastructure to build better apps and grow successful businesses.
Emitter is a real-time communication service for connecting online devices. Infrastructure and APIs for IoT, gaming, apps and real-time web. At its core, emitter.io is a distributed, scalable and fault-tolerant publish-subscribe messaging platform based on MQTT protocol and...
MongooseIM is aimed at large, complex enterprise level projects, where real-time communication is critical for business success. It provides high availability, ease of deployment, development and reliability in production.
MirrorFly is customizable communication APIs and SDKs for businesses to integrate or develop collaboration platforms with real-time chat, voice, video calling and video conferencing features on their existing web and mobile applications.
The OpenPush project aims to create a free and open source self-hosted replacement for Android Push Notifications usually sent through Google's proprietary Firebase Cloud Messaging platform.Discontinued
Development seems to have stalled before ever becoming available; a new alternative appeared in the form of UnifiedPush
deepstream.io is a clusterable realtime server that handles persistent tcp and websocket connections. It offers data-sync, pub/sub and request/response. It's available for Linux, Mac and Windows and comes with clients in JS, Java and many others.