Posteo vs Skiff Comparison (2025)

What are the differences between Posteo and Skiff?

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 Posteo.

Email Service Comparison

20 facts in comparison
Posteovs.Skiff

Posteo

Green, secure, ad-free
"Green, secure, ad-free"
  • Hardenize Test
  • Internet.nl Site Test
  • Internet.nl Mail Test
  • Mozilla HTTP Observatory Grade
  • Qualys SSL Labs SSL Server Test
vs.

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
€1/moPricing$3/mo
2 GBStorage15 GB
50 MBAttachments25 MB
NoOpen-Source❌ Skiff claims to be open-source, but their back-end is actually closed-source
NoSandboxed Encryption No
NoUnlimited DomainsNo
NoUnlimited AliasesNo
NoTTI No
YesSMTP❌ Skiff does not support SMTP and forces vendor lock-in
YesIMAP❌ Skiff does not support IMAP and forces vendor lock-in
YesPOP3❌ Skiff does not support POP3 and forces vendor lock-in
NoAPINo
⚠️ Opt-inE2EE ⚠️ Supported, but Skiff manages your private keys and is closed-source
YesOpenPGP Yes
YesWKD Yes

Email Service Screenshots

Closed-source

Posteo

Posteo is a closed-source email service. Their website says: Green, secure, ad-free

Posteo is a closed-source email service.
Photo by Forward Email
Visit Website
Closed-source

Skiff

Skiff is a closed-source email service. Its description from its website is: 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

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