While classic cleartext email providers, also Thunderbird with its Thundermail efforts, are aiming to be a more trustworthy alternative to Gmail/calendar/drive etc ...

#deltachat and #chatmail efforts go all-in on end-to-end encryption and metadata minimization, with decentralized transport relays playing much lesser roles than #Signal's Amazon/Microsoft/Google servers. At the same time, #webxdc apps provide unprecedented extensibility, eg checkout the great TOTP app https://webxdc.org/apps/#rtn-totp