A community I'm part of has met twice recently, using Zoom. If you're okay with limiting the meeting time to 40 minutes or less, it's free for up to 100 people. Plus, if you run out of time, you can immediately start a new 40-minute meeting, if you want. We did that once. I think this might be a special they're doing because of the coronavirus, but I would have to look it up to be sure.
We looked at Skype, but the free version limits meetings to 10 people for 60 days and 3 people after that, if I remember right.