GreatHorn Mailbox Intelligence vs PhishFirewall PhishEQ: Side-by-Side Comparison (2026)

Short answer

Teams running Microsoft 365 or Google Workspace who need users to actually catch phishing will find GreatHorn Mailbox Intelligence worthwhile, because the visual sender indicators and on-click URL analysis force friction into the attack chain where it matters most. The tool scores across all three NIST Detect and Awareness categories, with particular strength in DE.CM continuous monitoring and real-time risk assessment that surfaces threats before the user opens them. Skip this if your organization has already deployed a mature endpoint detection layer and expects email security to handle lateral movement detection; GreatHorn prioritizes the user reporting loop and initial threat identification, not forensic analysis of compromise. Mid-market and enterprise security teams managing Microsoft 365 or Google Workspace will get the most from PhishFirewall PhishEQ because it retracts phishing emails from all affected inboxes in under one second, turning what's normally a manual incident into an automated clawback. The API-based deployment requires no MX record changes, and the internal-to-internal scanning catches compromised account attacks that traditional external-only gateways miss. Not the right fit if you need detection-heavy threat hunting or deep forensics; PhishEQ prioritizes speed of containment and recovery over investigative depth.

Based on our analysis of core features, integrations, company size fit, deployment model, here is our conclusion: