/// Blog
Guides and practical notes on building realtime products and WhatsApp automation.
One publish to a thousand subscribers is a thousand deliveries. PubSub meters the way Pusher does — here is the rule, worked examples, and how WhatsApp messages translate into events.
WhatsApp gives you a webhook, not a live connection. Here is how PubSub turns that webhook into a realtime event your agents see instantly, and why it runs on the same socket layer as the rest of your app.
PubSub implements the Pusher protocol, so migrating is a configuration change rather than a rewrite. Here is exactly what changes, what stays the same, and how to verify the switch.