Mimecast vs Skiff Comparison (2025)

What are the differences between Mimecast 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 Mimecast.

Email Service Comparison

20 facts in comparison
Mimecastvs.Skiff

Mimecast

Email & Collaboration Security
"Email & Collaboration Security"
  • 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
See Mimecast plans (requires you to talk to a sales team) (according to a Reddit thread it may cost upwards of +$1000-2000 per month)Pricing$3/mo
UnknownStorage15 GB
200 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
❌ Requires 3rd partySMTP❌ Skiff does not support SMTP and forces vendor lock-in
❌ Requires 3rd partyIMAP❌ Skiff does not support IMAP and forces vendor lock-in
❌ Requires 3rd partyPOP3❌ Skiff does not support POP3 and forces vendor lock-in
YesAPINo
NoE2EE ⚠️ Supported, but Skiff manages your private keys and is closed-source
NoOpenPGP Yes
NoWKD Yes

Email Service Screenshots

Closed-source

Mimecast

Mimecast is a closed-source email service. Its description from its website is: Email & Collaboration Security

Mimecast is a closed-source email service.
Photograph by Forward Email
Visit Website
Closed-source

Skiff

Skiff is a closed-source email service. According to their website: 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

Compare Mimecast with 79 email services