It a proof of concept. I don’t know if they plan to keep working on it as it wasn’t received well because it’s AI

It does work pretty good and from a simple app

I think signal would be the easiest to set up and agrees to all your requirements. It’s got windows and iOS android apps.

Good if you have company phone numbers as it requires a phone number to create an account.

For the meeting point: Lokas - Record and transcribe your meetings in complete privacy.