You can have 10 people on-screen in the Basic, Professional, and Business plan.
You can have 6 people on-screen in the Free plan, but up to 10 people can enter the broadcast studio, so you can swap people in and out if you’re doing a dynamic talk show.
The maximum participants you can have in the studio on the Business Plan is 15 total (including the host). You can move people in and out of the studio at anytime to accommodate over 15 people, as long as there are only 15 people in the studio at once.
Free: 6 people on-screen, plus 4 people backstage (10 total).
Basic: 10 people on-screen/backstage (10 total).
Pro: 10 people on screen, plus 2 people backstage (12 total)
Business: 10 people on screen, plus 5 people backstage (15 total)