MailGuard is listed under Email security by MailGuard. The 12 alternatives below are listed in the same category and are compared on starting price, features and reviews from other MSPs.
Updated .
Mailprotector Channel-only email filtering, encryption and archiving for MSPs, priced only on request. 
SpamTitan Cloud and on-premises email security blocking phishing and malware, priced per user from $1.26 per month. MailGuard vs SpamTitan
Hornetsecurity 365 Total Protection M365 email security, backup and compliance suite from Hornetsecurity, part of Proofpoint, quote-only. 
TrendAI Email Security Cloud email protection with AI-driven phishing and malware detection, DLP, and Microsoft 365 integration. 
Trustifi Email security with inbound filtering, outbound encryption and DLP, priced per mailbox. MailGuard vs Trustifi
Microsoft Defender for Office 365 Microsoft 365 email security against phishing and malware, priced per user per month. MailGuard vs Microsoft Defender for Office 365
Sophos Email Cloud email security for Microsoft 365 and Google Workspace with post-delivery remediation. 
Sublime Security Email security via API with programmable rules, per mailbox, for Microsoft 365 and Google Workspace. MailGuard vs Sublime Security
Material Security Email and workspace security for Microsoft 365 and Google, priced from $4 per user monthly. MailGuard vs Material Security
Proofpoint 365 Total Protection Microsoft 365 security and backup suite for small businesses, quoted through MSPs. 
Libraesva AI-powered email security with archiving, phishing simulation and DMARC protection, priced on quote. 
Check Point Email Security API-based email and collaboration security from Avanan, quoted through Check Point partners. | Feature | MailGuard | Mailprotector | SpamTitan | Hornetsecurity 365 Total Protection | TrendAI Email Security | Trustifi | Microsoft Defender for Office 365 |
|---|---|---|---|---|---|---|---|
| Phishing and malware filtering | yes | yes | yes | yes | yes | yes | yes |
| Spoofing and impersonation protection | yes | yes | yes | yes | yes | yes | yes |
| Email continuity | yes | yes | yes | yes | yes | yes | yes |
| Archiving | yes | yes | yes | yes | yes | yes | yes |
| Security awareness training bundle | no | no | unknown | yes | unknown | yes | yes |
| API-based post-delivery scanning | no | yes | yes | unknown | yes | yes | yes |
| DMARC monitoring | unknown | no | yes | yes | yes | unknown | yes |
| Attachment sandboxing | unknown | no | yes | yes | yes | unknown | yes |
| Data loss prevention | yes | yes | yes | yes | yes | yes | yes |
| Email encryption | unknown | yes | yes | yes | yes | yes | yes |
| Microsoft 365 integration | yes | yes | yes | yes | yes | yes | yes |
| Self-service quarantine | yes | yes | yes | yes | yes | unknown | yes |
Mailprotector, which matches 7 of the 7 features MailGuard supports.
Sublime Security has a free version.
