Limits

Channels

A channel's name	up to 200 characters of A-Z a-z 0-9 _ - = @ , . ;
Channels a connection holds	1,000, for every tab and plugin of the browser
An event's data	10 KB of JSON
Channels one publish goes to	100
Events in one batch	10
A presence channel's members	1,000, the first 100 listed when subscribing
A member's info	1 KB
Client events	10 a second a browser, 10 KB each
A channels token's life	6 hours by default, at most a day; renewed by the page
A signed request's clock	within 5 minutes of the server's

Calls

People in a call	two; a group call's room for more
Ringing	45 seconds, then no_answer
A side's connection away during a call	45 seconds to come back
In a room after a hand-off, the other side	a minute to arrive
A calls token's life	6 hours; renewed by the page
A group call's room	32 people with video, 50 audio only

Staging copies

A staging copy of a site connects without using one of the subscription's sites, with up to 25 people online.

Fair use

A site's subscription covers any plugin's channels and calls on it, under fair use.