Fastmail vs N‑able Mail Assure Comparison (2026)

What are the differences between Fastmail and N‑able Mail Assure?

Forward Email Team
Written by
Forward Email TeamVerified
Published
3/1/26
Time to read
Less than 5 minutes
We recommend Forward Email as the best alternative to Fastmail. We also support webmail: https://mail.forwardemail.net

Email Service Comparison

20 facts in comparison
Fastmailvs.N‑able Mail Assure

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.

N‑able Mail Assure

Email protection to help you secure and scale
"Email protection to help you secure and scale"
  • Hardenize Test
  • Internet.nl Site Test
  • Internet.nl Mail Test
  • Mozilla HTTP Observatory Grade
  • Qualys SSL Labs SSL Server Test
$3/moPricingRequires you to talk to a sales team
2 GBStorageRequires 3rd party
70 MBAttachmentsDepends on inbound/outbound (e.g. 10 MB)
NoOpen-SourceNo
NoSandboxed Encryption No
NoUnlimited DomainsNo
NoUnlimited AliasesNo
NoTTI No
YesSMTP❌ Requires 3rd party
YesIMAP❌ Requires 3rd party
YesPOP3❌ Requires 3rd party
NoAPIYes
NoE2EE No
⚠️ Fastmail does support PGP, but not in their webmail; see this blog post for insightOpenPGP No
NoWKD No

Email Service Screenshots

Closed-source

Fastmail

Fastmail is a closed-source email service. Their official description reads: Fast, private email that’s just for you

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

N‑able Mail Assure

N‑able Mail Assure is a closed-source email service. Their website says: Email protection to help you secure and scale

N‑able Mail Assure is a closed-source email service.
Screenshot by Forward Email
Visit Website

Compare Fastmail with 78 email services