Fastmail vs Skiff Comparison (2025)

What are the differences between Fastmail 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 Fastmail.

Email Service Comparison

20 facts in comparison
Fastmailvs.Skiff

Fastmail

Fast, private email that’s just for you
"Fast, private email that’s just for you"
  • 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
$3/moPricing$3/mo
2 GBStorage15 GB
70 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
NoE2EE ⚠️ Supported, but Skiff manages your private keys and is closed-source
⚠️ Fastmail does support PGP, but not in their webmail; see this blog post for insightOpenPGP Yes
NoWKD Yes

Email Service Screenshots

Closed-source

Fastmail

Fastmail is a closed-source email service. Its description from its website is: Fast, private email that’s just for you

Fastmail is a closed-source email service.
Photograph by Forward Email
Go to site
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.
Photo by Forward Email
Visit Website

Compare Fastmail with 79 email services