DuoCircle vs Sendgrid Comparison (2025)

What are the differences between DuoCircle and Sendgrid?

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.Sendgrid

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.

Sendgrid

Get your emails to the inbox—where they belong
"Get your emails to the inbox—where they belong"
  • 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$19.95/mo
Requires 3rd partyStorageNo Sendgrid does not support storage
50 MBAttachments30 MB
NoOpen-SourceNo
NoSandboxed Encryption No
NoUnlimited DomainsNo
NoUnlimited AliasesNo
NoTTI No
❌ Requires 3rd partySMTPYes
❌ Requires 3rd partyIMAPNo
❌ Requires 3rd partyPOP3No
YesAPIYes
NoE2EE No
NoOpenPGP No
NoWKD No

Email Service Screenshots

Closed-source

DuoCircle

DuoCircle is a closed-source email service. According to their website: Protect Email Against Phishing, Spam and Malware

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

Sendgrid

Sendgrid is a closed-source email service. Their website says: Get your emails to the inbox—where they belong

Sendgrid is a closed-source email service.
Screenshot by Forward Email
Go to site

Compare DuoCircle with 78 email services