Skiff vs addy.io Comparison (2025)

What are the differences between Skiff and addy.io?

Forward Email Team
Written by
Forward Email TeamVerified
Published
1/1/25
Time to read
Less than 5 minutes
We recommend Forward Email as the best alternative to Skiff.

Email Service Comparison

20 facts in comparison
Skiffvs.addy.io

Skiff

Privacy-first end-to-end encrypted email (NOTE: this company is no longer in business and shutting down service in August 2024)
"Privacy-first end-to-end encrypted email (NOTE: this company is no longer in business and shutting down service in August 2024)"
  • 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
$3/moPricing$4/mo
15 GBStorageNo addy.io does not support storage
25 MBAttachments25 MB
❌ Skiff claims to be open-source, but their back-end is actually closed-sourceOpen-SourceYes
NoSandboxed Encryption No
NoUnlimited DomainsNo
NoUnlimited AliasesYes
NoTTI No
❌ Skiff does not support SMTP and forces vendor lock-inSMTPNo
❌ Skiff does not support IMAP and forces vendor lock-inIMAPNo
❌ Skiff does not support POP3 and forces vendor lock-inPOP3No
NoAPINo
⚠️ Supported, but Skiff manages your private keys and is closed-sourceE2EE No
YesOpenPGP No
YesWKD No

Email Service Screenshots

Closed-source

Skiff

Skiff is a closed-source email service. Their website says: Privacy-first end-to-end encrypted email (NOTE: this company is no longer in business and shutting down service in August 2024)

Skiff is a closed-source email service.
Photograph by Forward Email
Visit Website
Open-source

addy.io

addy.io is an open-source email service. According to their website: Protect your real email address using email aliases

addy.io is an open-source email service.
Screenshot by Forward Email
Visit Website

Compare Skiff with 79 email services