Brevo vs Proton Mail Comparison (2026)

What are the differences between Brevo and Proton Mail?

Forward Email Team
Written by
Forward Email TeamVerified
Published
1/1/26
Time to read
Less than 5 minutes
We recommend Forward Email as the best alternative to Brevo.

Email Service Comparison

20 facts in comparison
Brevovs.Proton Mail

Brevo

The most approachable CRM to cultivate lasting customer relationships across Email, SMS, Chat and more
"The most approachable CRM to cultivate lasting customer relationships across Email, SMS, Chat and more"
  • 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
$15/moPricing$3.99/mo
No Brevo does not support storageStorage15 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
NoIMAP❌ Requires you to download Proton Mail Bridge and forces vendor lock-in
NoPOP3❌ Proton Mail does not support POP3
YesAPINo
NoE2EE ⚠️ Proton Mail rewrites your emails
NoOpenPGP Yes
NoWKD Yes

Email Service Screenshots

Closed-source

Brevo

Brevo is a closed-source email service. According to their website: The most approachable CRM to cultivate lasting customer relationships across Email, SMS, Chat and more

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

Compare Brevo with 78 email services