Tutanota vs Proton Mail Comparison (2026)

What are the differences between Tutanota and Proton Mail?

Written by

Forward Email Team

Published

2/1/26

Time to read

Less than 5 minutes

We recommend Forward Email as the best alternative to Tutanota. We also support webmail: https://mail.forwardemail.net

Email Service Comparison

20 facts in comparison

Tutanota	vs.	Proton Mail
Tutanota "Secure, green and ad-free. Email to feel good about" Website	vs.	Proton Mail "Secure email that protects your privacy" Website
€36/yr	Pricing	$3.99/mo
20 GB	Storage	15 GB
25 MB	Attachments	25 MB
❌ Tutanota claims to be open-source, but their back-end is actually closed-source	Open-Source	❌ Proton Mail claims to be open-source, but their back-end actually is closed source
No	Sandboxed Encryption	No
No	Unlimited Domains	No
No	Unlimited Aliases	No
No	TTI	No
No	SMTP	❌ Requires you to download Proton Mail Bridge and forces vendor lock-in
No	IMAP	❌ Requires you to download Proton Mail Bridge and forces vendor lock-in
No	POP3	❌ Proton Mail does not support POP3
No	API	No
No	E2EE	⚠️ Proton Mail rewrites your emails
⚠️ Tutanota does not support PGP	OpenPGP	Yes
No	WKD	Yes