SimpleLogin vs Proton Mail Comparison (2026)

What are the differences between SimpleLogin and Proton Mail?

Forward Email Team
Written by
Forward Email TeamVerified
Published
2/1/26
Time to read
Less than 5 minutes
We recommend Forward Email as the best alternative to SimpleLogin. We also support webmail: https://mail.forwardemail.net

Email Service Comparison

20 facts in comparison
SimpleLoginvs.Proton Mail

SimpleLogin

Receive and send emails anonymously
"Receive and send emails anonymously"
  • 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
$4/moPricing$3.99/mo
No SimpleLogin does not support storageStorage15 GB
25 MBAttachments25 MB
YesOpen-Source❌ Proton Mail claims to be open-source, but their back-end actually is closed source
NoSandboxed Encryption No
YesUnlimited DomainsNo
YesUnlimited 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
⚠️ Opt-inE2EE ⚠️ Proton Mail rewrites your emails
YesOpenPGP Yes
NoWKD Yes

Email Service Screenshots

Open-source

SimpleLogin

SimpleLogin is an open-source email service. Its description from its website is: Receive and send emails anonymously

SimpleLogin is an open-source email service.
Photograph by Forward Email
Visit Website
Closed-source

Proton Mail

Proton Mail is a closed-source email service. Their official description reads: Secure email that protects your privacy

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