Cloudmark Authority vs MailGuard: side-by-side comparison (2026)

Cloudmark Authority: Carrier-grade email security for ISPs blocking spam, phishing, and malware. Built by Cloudmark.

MailGuard: Cloud-based managed email filtering against phishing, ransomware & BEC. Built by MailGuard.

The table above shows where their features, integrations, deployment and company size fit differ.

Cloudmark Authority is made by Cloudmark. MailGuard is made by MailGuard. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

Often, yes. Cloudmark Authority and MailGuard are both Email Security Platforms products, and both cover Spam Prevention. Use the table above to see where features, deployment and company size fit differ.