Startmail vs Cisco Secure Email Defense Comparison (2026)

Compare Startmail vs Cisco Secure Email Defense 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 Startmail. We also support webmail: https://mail.forwardemail.net

Email Service Comparison

20 facts in comparison

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