Proton Mail vs Tutanota Comparison (2025)

What are the differences between Proton Mail and Tutanota?

Forward Email Team
Written by
Forward Email TeamVerified
Published
7/1/25
Time to read
Less than 5 minutes
We recommend Forward Email as the best alternative to Proton Mail.

Email Service Comparison

20 facts in comparison
Proton Mailvs.Tutanota

Proton Mail

Secure email that protects your privacy
"Secure email that protects your privacy"
  • Hardenize Test
  • Internet.nl Site Test
  • Internet.nl Mail Test
  • Mozilla HTTP Observatory Grade
  • Qualys SSL Labs SSL Server Test
vs.

Tutanota

Secure, green and ad-free. Email to feel good about
"Secure, green and ad-free. Email to feel good about"
  • Hardenize Test
  • Internet.nl Site Test
  • Internet.nl Mail Test
  • Mozilla HTTP Observatory Grade
  • Qualys SSL Labs SSL Server Test
$3.99/moPricing€36/yr
15 GBStorage20 GB
25 MBAttachments25 MB
❌ Proton Mail claims to be open-source, but their back-end actually is closed sourceOpen-Source❌ Tutanota claims to be open-source, but their back-end is actually closed-source
NoSandboxed Encryption No
NoUnlimited DomainsNo
NoUnlimited AliasesNo
NoTTI No
❌ Requires you to download Proton Mail Bridge and forces vendor lock-inSMTPNo
❌ Requires you to download Proton Mail Bridge and forces vendor lock-inIMAPNo
❌ Proton Mail does not support POP3POP3No
NoAPINo
⚠️ Proton Mail rewrites your emailsE2EE No
YesOpenPGP ⚠️ Tutanota does not support PGP
YesWKD No

Email Service Screenshots

Closed-source

Proton Mail

Proton Mail is a closed-source email service. According to their website: Secure email that protects your privacy

Proton Mail is a closed-source email service.
Photograph by Forward Email
Go to site
Closed-source

Tutanota

Tutanota is a closed-source email service. According to their website: Secure, green and ad-free. Email to feel good about

Tutanota is a closed-source email service.
Screenshot by Forward Email
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Compare Proton Mail with 78 email services