DuoCircle vs Mailfence Comparison (2025)

What are the differences between DuoCircle and Mailfence?

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 DuoCircle.

Email Service Comparison

20 facts in comparison
DuoCirclevs.Mailfence

DuoCircle

Protect Email Against Phishing, Spam and Malware
"Protect Email Against Phishing, Spam and Malware"
  • Hardenize Test
  • Internet.nl Site Test
  • Internet.nl Mail Test
  • Mozilla HTTP Observatory Grade
  • Qualys SSL Labs SSL Server Test
vs.

Mailfence

Secure and private email
"Secure and private email"
  • 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$3.50/mo
Requires 3rd partyStorage10 GB
50 MBAttachments50 MB
NoOpen-SourceNo
NoSandboxed Encryption No
NoUnlimited DomainsNo
NoUnlimited AliasesNo
NoTTI No
❌ Requires 3rd partySMTPYes
❌ Requires 3rd partyIMAPYes
❌ Requires 3rd partyPOP3Yes
YesAPINo
NoE2EE ⚠️ Opt-in
NoOpenPGP Yes
NoWKD Yes

Email Service Screenshots

Closed-source

DuoCircle

DuoCircle is a closed-source email service. Its description from its website is: Protect Email Against Phishing, Spam and Malware

DuoCircle is a closed-source email service.
Photograph by Forward Email
Go to site
Closed-source

Mailfence

Mailfence is a closed-source email service. Their official description reads: Secure and private email

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

Compare DuoCircle with 78 email services