Cisco Secure Email Defense vs addy.io Comparison (2026)

Compare Cisco Secure Email Defense vs addy.io 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 Cisco Secure Email Defense. We also support webmail: https://mail.forwardemail.net

Email Service Comparison

20 facts in comparison
Cisco Secure Email Defensevs.addy.io

Cisco Secure Email Defense

Advanced protection to safeguard your inboxes
"Advanced protection to safeguard your inboxes"
  • Hardenize Test
  • Internet.nl Site Test
  • Internet.nl Mail Test
  • Mozilla HTTP Observatory Grade
  • Qualys SSL Labs SSL Server Test
vs.

addy.io

Protect your real email address using email aliases
"Protect your real email address using email aliases"
  • 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$4/mo
UnknownStorageNo addy.io does not support storage
100 MBAttachments25 MB
NoOpen-SourceYes
NoSandboxed Encryption No
NoUnlimited DomainsNo
NoUnlimited AliasesYes
NoTTI No
❌ Requires 3rd partySMTPNo
❌ Requires 3rd partyIMAPNo
❌ Requires 3rd partyPOP3No
YesAPINo
NoE2EE No
NoOpenPGP No
NoWKD No

Email Service Screenshots

Closed-source

Cisco Secure Email Defense

Cisco Secure Email Defense is a closed-source email service. Their official description reads: Advanced protection to safeguard your inboxes

Cisco Secure Email Defense is a closed-source email service.
Screenshot by Forward Email
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Open-source

addy.io

addy.io is an open-source email service. Their official description reads: Protect your real email address using email aliases

addy.io is an open-source email service.
Photo by Forward Email
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Compare Cisco Secure Email Defense with 78 email services