SignalR Alternatives

Realtime application framework (Node.JS server)

Open Source

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

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

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.

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). )

RabbitMQ is an open source message broker software.

Open Source

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

Open Source

Serious realtime infrastructure

freemium

Apache Kafka is publish-subscribe messaging rethought as a distributed commit log.

Redis is an open source in-memory data structure project implementing a distributed, in-memory key-value database with optional durability.

Open Source

Android development environment based on IntelliJ IDEA

An open, scalable realtime engine for Node.js

Open Source

Lightstreamer is a server for delivering real-time messages to browser-based and mobile...