Tutanota vs Proton Mail Comparison (2025)

What are the differences between Tutanota and Proton Mail?

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 Tutanota.

Email Service Comparison

20 facts in comparison
Tutanotavs.Proton Mail

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
vs.

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
€36/yrPricing$3.99/mo
20 GBStorage15 GB
25 MBAttachments25 MB
❌ Tutanota claims to be open-source, but their back-end is actually closed-sourceOpen-Source❌ Proton Mail claims to be open-source, but their back-end actually is closed source
NoSandboxed Encryption No
NoUnlimited DomainsNo
NoUnlimited AliasesNo
NoTTI No
NoSMTP❌ Requires you to download Proton Mail Bridge and forces vendor lock-in
NoIMAP❌ Requires you to download Proton Mail Bridge and forces vendor lock-in
NoPOP3❌ Proton Mail does not support POP3
NoAPINo
NoE2EE ⚠️ Proton Mail rewrites your emails
⚠️ Tutanota does not support PGPOpenPGP Yes
NoWKD Yes

Email Service Screenshots

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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Closed-source

Proton Mail

Proton Mail is a closed-source email service. Their website says: Secure email that protects your privacy

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