Yesterday I posted about Zoom and the critical flaws in the program. I tested out a couple of programs yesterday, but ultimately, decided to post a link to an article with a list of similar apps and programs. Make Use Of is a tech website that I've used for a long time for instruction and suggestions. I trust them and their suggestions.
I tested FreeConference.com and Jitsi yesterday. Both are good. Especially Jitsi. I've also used FreeConference.com in the past and it is also reliable.
I used Skype in the long ago past, but it's part of the Microsoft Office suite, so it is boring, but functional and reliable.
Then there's WebEx. It's reliable. I hate it, but it's for personal reasons. Your mileage may vary. Many, many people love it.
I'm told that Telegram is able to do video calls and group chats, but at this time, I'm unable to figure out how to do it. And I'm a regular user of Telegram and love the program. If I figure out how to do it, I'll post it here with download instructions.
Meanwhile, go read the list from Make Use Of and read the comments as well. I can't personally vouch for the safety or security of the recommendations in the comments, but they are often worth exploring.