The open source Firebase alternative. Supabase adds realtime and restful APIs to Postgres without a single line of code.

Ably is described as 'Enterprise-grade infrastructure enables secure, low-latency pub/sub messaging, supporting mission-critical realtime features and automatic failover globally' and is a web app development tool in the development category. There are more than 10 alternatives to Ably, not only websites but also apps for a variety of platforms, including Self-Hosted, Mac, Windows and Linux apps. The best Ably alternative is Supabase, which is both free and Open Source. Other great sites and apps similar to Ably are Firebase, Socket.io, Etebase and LatteStream.
The open source Firebase alternative. Supabase adds realtime and restful APIs to Postgres without a single line of code.

Firebase, provided by Google, is a backend service and application development platform. It uses AI, cloud infrastructure, and cross-platform SDKs for efficient app development. Firebase offers tools and infrastructure for app creation and business growth.


Socket.IO aims to make real-time apps possible in every browser and mobile device, blurring the differences between the different transport mechanisms.

LatteStream is a developer-first WebSocket infrastructure service that delivers enterprise-grade real-time messaging at a fraction of traditional costs. Built by engineers tired of overpaying for basic infrastructure, we offer sustainable, transparent pricing that scales with...
Instant is for building real-time and offline-enabled applications. We make it easy to build collaborative products like Notion or Figma.
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.
Scaledrone is a realtime messaging service and platform. Send live updates, create chatrooms and collaborative tools.


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

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.
Hotsock is a fully-private service that powers real-time functionality in your web and mobile apps, installed serverlessly in your own AWS account.