Zoho vs Proton Mail Comparison (2026)

Compare Zoho vs Proton Mail email services. In-depth analysis of features, pricing, security, privacy, and storage to find the best email provider for your needs.

Forward Email Team
Written by
Forward Email TeamVerified
Published
4/1/26
Time to read
Less than 5 minutes
We recommend Forward Email as the best alternative to Zoho. We also support webmail: https://mail.forwardemail.net

Email Service Comparison

20 facts in comparison
Zohovs.Proton Mail

Zoho

Secure business email for your organization
"Secure business email for your organization"
  • 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
$12/yrPricing$3.99/mo
5 GBStorage15 GB
20 MBAttachments25 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
YesSMTP❌ Requires you to download Proton Mail Bridge and forces vendor lock-in
YesIMAP❌ Requires you to download Proton Mail Bridge and forces vendor lock-in
YesPOP3❌ Proton Mail does not support POP3
NoAPINo
NoE2EE ⚠️ Proton Mail rewrites your emails
NoOpenPGP Yes
NoWKD Yes

Email Service Screenshots

Closed-source

Zoho

Zoho is a closed-source email service. Their official description reads: Secure business email for your organization

Zoho is a closed-source email service.
Screenshot by Forward Email
Visit Website
Closed-source

Proton Mail

Proton Mail is a closed-source email service. According to their website: Secure email that protects your privacy

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