Privacy: Encrypted Email

Criteria ProtonMail Tutanota
Audited? Yes Web client only
Available on Debian? Paid Bridge Only Yes
Available on Mac? Paid Bridge Only Yes
Available on Windows? Paid Bridge Only Yes
Available on Android? Yes Yes
Available in F-Droid (Android Only)? No Yes
Available on iOS? Yes Yes
Based in 5/9/14 Eyes? No Yes
Free plan available? Yes Yes
PGP-Based Yes No
Backup/Export available Yes Yes
Additional notes? Includes VPN service with all plans