The meeting itself
Google Meet
The capacity ladder is the one thing the evidence commits to per plan — 100, 150, 500, 1000 participants, 24-hour meetings on every tier, in-domain live streaming on Enterprise. Beyond that, nothing: no screen sharing, no breakout rooms, no host moderation, no word on behaviour when the connection degrades — capacity is claimed, the meeting's workings are not.
Wire
The pricing page publishes a 150-participant cap for video conferences on the paid tier, and instant meetings and conferencing are named core capabilities, but that is where the public information stops. I found no public information on screen sharing, breakout rooms, host moderation controls, waiting rooms, or documented behaviour on a constrained connection — a capacity number without the meeting mechanics a buyer needs.