Mimecast vs Sendgrid Comparison (2025)

What are the differences between Mimecast and Sendgrid?

Forward Email Team
Written by
Forward Email TeamVerified
Published
11/1/25
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.Sendgrid

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.

Sendgrid

Get your emails to the inbox—where they belong
"Get your emails to the inbox—where they belong"
  • 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$19.95/mo
UnknownStorageNo Sendgrid does not support storage
200 MBAttachments30 MB
NoOpen-SourceNo
NoSandboxed Encryption No
NoUnlimited DomainsNo
NoUnlimited AliasesNo
NoTTI No
❌ Requires 3rd partySMTPYes
❌ Requires 3rd partyIMAPNo
❌ Requires 3rd partyPOP3No
YesAPIYes
NoE2EE No
NoOpenPGP No
NoWKD No

Email Service Screenshots

Closed-source

Mimecast

Mimecast is a closed-source email service. According to their website: Email & Collaboration Security

Mimecast is a closed-source email service.
Photograph by Forward Email
Go to site
Closed-source

Sendgrid

Sendgrid is a closed-source email service. Its description from its website is: Get your emails to the inbox—where they belong

Sendgrid is a closed-source email service.
Screenshot by Forward Email
Visit Website

Compare Mimecast with 78 email services