The meeting itself
Google Meet
Participant capacity is published per plan (100/150/500/1000) with 24-hour meetings, in-domain live streaming and a hardware-room add-on, which is genuinely strong scale. But the evidence is silent on screen sharing, breakout rooms, host moderation, waiting rooms and what happens on a constrained connection — undocumentable mechanics cannot be relied on for a works assembly.
Zoom
Capacity is published per plan — 100 participants on Basic and Pro, 300 on Business, a paid add-on up to 5,000, webinars at 500 — and breakout rooms carry five roles with timers, preassignment and help requests, which is real host control. Waiting rooms, passcodes and authenticated-only joining are enforced even when meetings are created through the API. We found no public information on adaptive quality or behaviour on constrained and mobile networks, or on diagnostics an administrator could read after a bad call.