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

freemium

Flagsmith lets you manage feature flags and remote config across web, mobile and server side applications. Deliver true Continuous Integration. Get builds out faster. Control who has access to new features. We're Open Source.

Try for free Open Source freemium

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

Open Source

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

Realtime application framework (Node.JS server)

Open Source

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.

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

A scalable server for realtime webapps

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

Open Source paid Free Trial

NATS.io is an open source messaging system for cloud native applications, IoT messaging, Edge, and microservices architectures.

Open Source

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

free

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

Open Source

Self-hosted Firebase.