The meeting itself
Google Meet
Published capacity I can actually plan against — 100/150/500/1000 participants per plan, 24-hour meetings, in-domain streaming at Enterprise, and a hardware add-on for rooms. But the evidence is silent on moderation controls, waiting rooms, breakouts, behaviour on a bad connection, and any diagnostics an admin can read after a call fails — and I judge a product by its worst meeting, not the capacity slide.
Zoom
Capacity is published per plan — 100, 100 and 300 participants, webinars at 500, and an add-on path to 5,000 — and breakout rooms are documented down to roles, preassignment and help requests, which is what I want to see rather than promises. Waiting rooms and a mandatory minimum security option are enforced even at the API level, and live streaming is stated. What I found no public information on is adaptive quality under load, hardware room-system support, or diagnostics an admin can read after a bad call.