Scaledrone Alternatives

PubNub is a real-time messaging system for web and mobile apps that can handle API for all platforms and push messages to any device anywhere in the world in a fraction of a second without having to worry about proxies, firewalls or mobile drop-offs.

Serious realtime infrastructure

NOTIX is an audience re-engagement service based on web and in-app push notifications that work for both desktop and mobile devices.

Try for free freemium

Pusher is a hosted API for quickly, easily and securely adding scalable realtime functionality via WebSockets to web and mobile apps.

Firebase is a cloud service designed to power real-time, collaborative applications for mobile and web.

Realtime application framework (Node.JS server)

Customer engagement platform used by over 1 million developers and marketers; the fastest and most reliable way to send mobile and web push notifications, in-app messages, emails, and SMS.

freemium $9.0 / Monthly (Plus usage-based costs. (Growth Plan). )

a lightning fast realtime data-store that connects browsers, smartphones, backends and the IoT - complete with realtime search, publish-subscribe and request-response

World's Most Scalable Voice, Video & Chat SDK for Small, Medium & Enterprises

paid Free Trial

Lightweight, Realtime Message Bus for the Web

DigitalPUSH allows you to re-engage visitors and drive them back to your website, from anywhere on the browser, for FREE!

free

Self-hosted Firebase.

Nchan is a scalable, configurable pub/sub server for the modern web, built as a module for the...

A scalable server for realtime webapps