Vade Secure vs Proton Mail Comparison (2025)

What are the differences between Vade Secure and Proton Mail?

Written by

Forward Email Team

Published

7/1/25

Time to read

Less than 5 minutes

We recommend Forward Email as the best alternative to Vade Secure.

Email Service Comparison

20 facts in comparison

Vade Secure	vs.	Proton Mail
Vade Secure "Simple, Sophisticated Email Security Powered by AI" Website	vs.	Proton Mail "Secure email that protects your privacy" Website
Requires you to talk to a sales team	Pricing	$3.99/mo
Requires 3rd party	Storage	15 GB
50 MB	Attachments	25 MB
No	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
❌ Requires 3rd party	SMTP	❌ Requires you to download Proton Mail Bridge and forces vendor lock-in
❌ Requires 3rd party	IMAP	❌ Requires you to download Proton Mail Bridge and forces vendor lock-in
❌ Requires 3rd party	POP3	❌ Proton Mail does not support POP3
Yes	API	No
No	E2EE	⚠️ Proton Mail rewrites your emails
No	OpenPGP	Yes
No	WKD	Yes

Email Service Screenshots

Closed-source

Vade Secure

Vade Secure is a closed-source email service. Its description from its website is: Simple, Sophisticated Email Security Powered by AI

Vade Secure is a closed-source email service.

Photograph by Forward Email

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.

Photograph by Forward Email

Compare Vade Secure with 78 email services