I love Ably for its advanced pub/sub messaging capabilities, which help us with messaging Delta Compression, allowing us to send only changes from previous messages instead of entire payloads every time. For example, if I have to say 'hi', instead of sending the whole payload, it only sends the change in the current payload, reducing bandwidth consumption and enabling high-frequency data streaming. This major change has made our clients really happy as they receive notifications and messages without latency. Additionally, if a client goes offline, Ably stores messages in history for up to 72 hours, allowing clients to query history and catch up on missed events, ensuring complete stream continuity. It also supports multi-protocol, using WebSockets and gracefully falling back to server-sent events and long polling as needed, including support for MQTT and IoT devices along with pub/sub control for easy migration.I appreciate the serverless integration that has the integrated native web hook, instantly triggering serverless functions such as AWS Lambda and Azure Function when specific real-time events occur. It also allows Kafka Connector for seamless ingestion of messages from Kafka topics to stream them out to millions of users in milliseconds.
