Cisco Secure Email Defense vs Startmail Comparison (2026)

Compare Cisco Secure Email Defense vs Startmail email services. In-depth analysis of features, pricing, security, privacy, and storage to find the best email provider for your needs.

Written by

Forward Email Team

Published

4/1/26

Time to read

Less than 5 minutes

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

Email Service Comparison

20 facts in comparison

Cisco Secure Email Defense	vs.	Startmail
Cisco Secure Email Defense "Advanced protection to safeguard your inboxes" Website	vs.	Startmail "Private email you can trust" Website
Requires you to talk to a sales team	Pricing	$7/mo
Unknown	Storage	20 GB
100 MB	Attachments	25 MB
No	Open-Source	No
No	Sandboxed Encryption	❌ Startmail claims to use a User Vault, but this statement has not been audited and their source code is closed-source
No	Unlimited Domains	No
No	Unlimited Aliases	No
No	TTI	No
❌ Requires 3rd party	SMTP	Yes
❌ Requires 3rd party	IMAP	Yes
❌ Requires 3rd party	POP3	Yes
Yes	API	No
No	E2EE	⚠️ Supported if both sender and recipient are using OpenPGP
No	OpenPGP	⚠️ Supports OpenPGP, but does not support WKD
No	WKD	No