There’s a nonprofit that wants to do several meetings for lectures for about 3000 students. The presenter will show screen or share a document for the most part. At the end students would raise hand and have some discussion, so they will be just viewers for most of meeting
Of course, big corps like teams and google meeting won’t Handel this much, not for free at least.
Could I suggest jitsi to them? Can it Handel this much? How much is it going to cost?


Not for groups
ElementX does. But it’s glitchy. It won’t work for this purpose anyway.
What you need is a streaming platform for the video presentation, supported by a separate interactivity, similar to discord chat or something. Have the presenter supported by someone monitoring the feedback.
You do not need a group video call because there is no possible way to accommodate 3000 speakers. If they are just viewers, then streaming is appropriate. Interactivity can be accomplished through text and document uploads.
There are a huge number of options, depending on what kind of an institution you represent and what kind of commitment and membership students have. I have made bespoke set ups for something like this, and it really does depend on the variables.
Maybe Brave Talk? but it’s not free for big groups. Although it’s cheap: 7 USD/Month. And it doesn’t require an account.
Brave Talk is just skinned Jitsi. You can try Mullvad’s Jitsi, but good luck with 3k people.
In fact, for 3k people you just can use Youtube Live