Today, we’re pleased to support Flutter’s growing community of builders by releasing Ably’s Flutter plugin v1.0. This makes it easy for developers to add WebSocket-based pub/sub messaging to their Flutter applications. Flutter has grown incredibly over the past few years, providing a platform to build modern applications. Increasingly, developers are looking to build event-driven applications where user interactions play out in realtime.

In this article, we'll see how to use Airtable to store realtime messages using a group chat app as an example. We'll use Ably's realtime infrastructure to power the chat app and make use of WebHooks to publish messages to Airtable directly in the correct order from Ably. Check the full source code of the group chat app written in VueJS on GitHub and the live demo of the application at https://realtime-chat-storage.ably.dev/

Exactly-once is a desirable (if not critical) message delivery guarantee and a remarkably complex engineering challenge to solve. In this blog post, we will look at what exactly-once means in the context of distributed pub/sub systems, and the exactly-once guarantees that the Ably realtime pub/sub messaging platform provides. Ably often acts as the broker in data streaming pipelines: publishers send messages to our platform, and we deliver these messages to subscribers.