Zoom is pretty much it, isn't it? (unless you require cheap == free) It did have some security issues, but they patched them eventually. It is not resistant to

Zoom is pretty much it, isn't it? (unless you require cheap == free) It did have some security issues, but they patched them eventually. It is not resistant to government/owner monitoring (and this is a separate thing from "secure"), but even if they did add true E2E, they'd still be a proprietary software often running on proprietary OS.