Mimecast vs Cisco Secure Email Defense Comparison (2026)

What are the differences between Mimecast and Cisco Secure Email Defense?

Written by

Forward Email Team

Published

2/1/26

Time to read

Less than 5 minutes

We recommend Forward Email as the best alternative to Mimecast. We also support webmail: https://mail.forwardemail.net

Email Service Comparison

20 facts in comparison

Mimecast	vs.	Cisco Secure Email Defense
Mimecast "Email & Collaboration Security" Website	vs.	Cisco Secure Email Defense "Advanced protection to safeguard your inboxes" Website
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	Requires you to talk to a sales team
Unknown	Storage	Unknown
200 MB	Attachments	100 MB
No	Open-Source	No
No	Sandboxed Encryption	No
No	Unlimited Domains	No
No	Unlimited Aliases	No
No	TTI	No
❌ Requires 3rd party	SMTP	❌ Requires 3rd party
❌ Requires 3rd party	IMAP	❌ Requires 3rd party
❌ Requires 3rd party	POP3	❌ Requires 3rd party
Yes	API	Yes
No	E2EE	No
No	OpenPGP	No
No	WKD	No