Executive SummaryUpdated on Feb 8, 2026
Mimecast Advanced Email Security and Microsoft Exchange Online Protection compete in the email security category. Mimecast appears to have the upper hand due to its flexibility and superior threat protection features, while Microsoft EOP excels in its seamless integration with the Microsoft 365 ecosystem.
Features: Mimecast Advanced Email Security offers robust features such as sandboxing, email archiving, and preventing access to malicious sites, all complemented by efficient filtering. Microsoft EOP integrates smoothly with Office 365 and offers anti-phishing and spam protection through Safe Links and advanced threat management.
Room for Improvement: Mimecast could improve its admin console and simplify handling malicious emails, addressing costly data extraction fees and improving its reporting process. Microsoft EOP faces criticism for its high costs and suggests the purchase of additional licenses for advanced features. Users also report configuration challenges and the need for better automated threat detection.
Ease of Deployment and Customer Service: Both Mimecast and Microsoft EOP are deployable in various environments like Public and Hybrid Clouds. Mimecast's customer support is heavily based on online documentation, whereas Microsoft EOP offers stable support despite configuration challenges. Users find the deployment straightforward, with Mimecast being more flexible.
Pricing and ROI: Mimecast is considered a premium product with high pricing but offers a moderate ROI by effectively blocking phishing threats. Microsoft EOP is similarly expensive, justifying its cost with strong Office 365 integration, though some users find the pricing prohibitive, it ensures a high level of security for large corporations.
To learn more, read our detailed
Anti-Malware Tools Report (Updated: June 2026).
