Jitsi works really well, and the developers seem to have made an effort to have it work well on any platform, even mobile browsers and PSTN. I’ve always found it the lowest friction teleconferencing method for all types of users.
It’s self-hostable, integrates with SIP, and 8x8’s commercial offering mentions HIPAA, BAA and GDPR.
https://jaas.8x8.vc/#/pricing
(I have never used their commercial offering).