To replace everything. Mail, calendar, drive, vpn, password manager, documents etc. What are the pros and cons relative to proton? What are the mobile apps like? What assurances do you have they won’t go full proton in the future? And other questions
Tuta – https://tuta.com/
Includes mail and calendar and contacts. No files, or password management. But worth a look, if you want an encrypted solution and you’re OK with using their client apps. I do, and I am and it’s great, IMO.
Their blogs say they’re pro-privacy, and anti-BS, if you believe them: https://tuta.com/blog