Group-IB Business Email Protection vs Sublime Security Sublime Rules: Side-by-Side Comparison (2026)

Group-IB Business Email Protection

Mid-market and enterprise security teams drowning in phishing and BEC attacks will see the real payoff from Group-IB Business Email Protection: threat actor attribution and MITRE ATT&CK mapping that actually tells you who hit you and how, not just that something was malicious. It inspects over 290 file formats and can retroactively scrub threats from mailboxes, which handles the detection and recovery sides well, though its strength clearly leans toward identifying threats rather than preventing them upstream. Skip this if your primary concern is reducing false positives for your overworked SOC; Group-IB prioritizes catching sophisticated attacks over tuning alert fatigue.

Sublime Security Sublime Rules

Security teams running Microsoft 365 or Google Workspace who need to stop BEC and credential phishing without adding another paid platform should start with Sublime Security Sublime Rules. The detection logic is built on Message Query Language rules that actually catch HTML smuggling and OneNote malware where signature-based filters fail, and you get DLP discovery rules included at zero cost. Skip this if your org needs automated response or investigation workflows; Sublime Rules is detection-only and assumes you have a process to act on what it finds.