The meeting itself
Google Meet
Capacity is genuinely published — 100 to 1000 participants depending on plan, 24-hour meetings, noise cancellation from Standard, in-domain live streaming at Enterprise. But the evidence never mentions a screen share, a breakout room, a mute control or what happens when half my class joins on a weak mobile signal, and anchor five requires exactly those — so I stop just under it.
Wire
Video conferences are published at up to 150 participants on the paid team plan, but I found no public information on breakout rooms, on mute-all or other host moderation, or on how a call behaves when someone's connection drops to one bar — the three things my classroom needs most. Screen sharing in a call is never stated outright; the sharing that is documented is file sharing, and capacity above the team tier sits behind custom pricing.