Live Events & Collaboration

Fan-out is the hard part

A live dashboard or a collaborative document has a very different traffic shape from a typical chat app: one event — a score update, a cursor move, a KPI change — has to reach potentially millions of subscribers at once, all expecting to see it at effectively the same moment. That fan-out pattern is where naive pub/sub implementations fall over under load, right when the audience is largest and most engaged.

Relay's egress fan-out is built for exactly this: each ingress event can deliver to many subscribers without the publishing client paying for that multiplication, and the platform's global edge network keeps delivery latency low regardless of how large the audience gets during a live moment.

What's included

• →Live dashboards: analytics and KPI updates reach every viewer the moment they happen.
• →Presence and collaboration: real-time document editing and cursor presence stay in sync across every connected client.
• →Fan engagement at scale: interactive live events keep millions of viewers in sync without a proportional infrastructure cost per viewer.