After Proton has repeatedly turned over users of their email account to law enforcement, always with many excuses, their claims about no ability for any government to see what's going on on their network ran very hollow.
I know Brave has offered their talk video conferencing service for awhile, but I don't know if any serious network analysis has been performed on it.
https://talk.brave.com/
I know Brave has offered their talk video conferencing service for awhile, but I don't know if any serious network analysis has been performed on it. https://talk.brave.com/
For document collaboration, I'm not aware of much else that's private/encrypted (etc) however. https://www.privacyguides.org/en/document-collaboration/