Attic M365 FREE vs Sublime Security Sublime Rules: Side-by-Side Comparison (2026)

Attic M365 FREE: Protects Microsoft 365 users from phishing attacks using fake login pages. built by Attic Security. Core capabilities include Real-time detection of fake Microsoft 365 login pages, Red alarm screen warning when accessing fraudulent pages, Authenticity seal display on official Microsoft 365 login pages..

Sublime Security Sublime Rules: Open-source detection rules for email attacks like BEC, phishing, and malware. built by Sublime Security. Core capabilities include Detection rules for email attacks, Business email compromise (BEC) detection, Credential phishing detection..

Both serve the Anti-Phishing market but differ in approach, feature depth, and target audience.

Attic M365 FREE differentiates with Real-time detection of fake Microsoft 365 login pages, Red alarm screen warning when accessing fraudulent pages, Authenticity seal display on official Microsoft 365 login pages. Sublime Security Sublime Rules differentiates with Detection rules for email attacks, Business email compromise (BEC) detection, Credential phishing detection.

Attic M365 FREE is developed by Attic Security. Sublime Security Sublime Rules is developed by Sublime Security. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

Attic M365 FREE and Sublime Security Sublime Rules serve similar Anti-Phishing use cases. Key differences: Attic M365 FREE is Commercial while Sublime Security Sublime Rules is Free. Review the feature comparison above to determine which fits your requirements.