Trustifi vs Proton Mail Comparison (2025)

What are the differences between Trustifi 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 Trustifi.

Email Service Comparison

20 facts in comparison
Trustifivs.Proton Mail

Trustifi

Protect Your Business Emails with AI-Powered Security
"Protect Your Business Emails with AI-Powered Security"
  • 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
Requires you to talk to a sales teamPricing$3.99/mo
Requires 3rd partyStorage15 GB
UnknownAttachments25 MB
NoOpen-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
❌ Requires 3rd partySMTP❌ Requires you to download Proton Mail Bridge and forces vendor lock-in
❌ Requires 3rd partyIMAP❌ Requires you to download Proton Mail Bridge and forces vendor lock-in
❌ Requires 3rd partyPOP3❌ Proton Mail does not support POP3
YesAPINo
NoE2EE ⚠️ Proton Mail rewrites your emails
NoOpenPGP Yes
NoWKD Yes

Email Service Screenshots

Closed-source

Trustifi

Trustifi is a closed-source email service. Their official description reads: Protect Your Business Emails with AI-Powered Security

Trustifi is a closed-source email service.
Photograph by Forward Email
Go to site
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.
Photo by Forward Email
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Compare Trustifi with 78 email services