N‑able Mail Assure vs Mimecast Comparison (2025)

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

Written by

Forward Email Team

Published

7/1/25

Time to read

Less than 5 minutes

We recommend Forward Email as the best alternative to N‑able Mail Assure.

Email Service Comparison

20 facts in comparison

N‑able Mail Assure	vs.	Mimecast
N‑able Mail Assure "Email protection to help you secure and scale" Website	vs.	Mimecast "Email & Collaboration Security" Website
Requires you to talk to a sales team	Pricing	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)
Requires 3rd party	Storage	Unknown
Depends on inbound/outbound (e.g. 10 MB)	Attachments	200 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