Realtime & Messaging

Ably is a realtime messaging platform that provides pub/sub APIs, chat, AI transport, live objects, spaces, and live sync for applications that need low-latency updates and state synchronization. The ...

Liveblocks

Liveblocks is a realtime infrastructure platform for multiplayer apps and collaborative AI workflows. It provides hosted primitives for presence, broadcast events, synced storage, feeds, and threads, ...

Pusher

Pusher provides hosted realtime APIs for building features such as live updates, pub/sub messaging, in-app chat, location tracking, and push notifications. Its Channels product supports publish/subscribe messaging across web and mobile clients, while Beams handles programmatic push notifications.

PartyKit is an open source deployment platform for AI agents, multiplayer and local-first apps, games, and websites. It provides a server-side runtime for WebSockets, Fetch request/response handlers, and Wasm, with a CLI for local development and edge deployment.

Amazon SNS

Amazon Simple Notification Service (SNS) is a fully managed pub/sub messaging service from AWS that helps applications send notifications and distribute events at scale.