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GreatHorn Mailbox Intelligence is a commercial anti-phishing tool by GreatHorn. PhishingBox KillPhish is a commercial anti-phishing tool by PhishingBox. Compare features, ratings, integrations, and community reviews side by side to find the best anti-phishing fit for your security stack.
CST VerdictBased on our analysis of NIST CSF 2.0 coverage, core features, integrations, company size fit, here is our conclusion:
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.
Teams managing email risk across Microsoft 365 or Google Workspace who need their users to actually report threats should pick PhishingBox KillPhish, since the integrated reporting button plus live inbox training measurably shifts user behavior away from silent deletion. The vendor's Net Reporter Score directly tracks whether your workforce is becoming a reliable detection layer, which covers the PR.AT and DE.CM gaps most smaller security teams ignore. Skip this if you need advanced sandbox detonation or threat intelligence feeds; KillPhish is deliberately focused on making your users your first line of defense, not replacing your email gateway.
Email security tool empowering users to identify & report phishing threats
Email threat scanning and reporting add-in for Microsoft 365 and Google
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Common questions about comparing GreatHorn Mailbox Intelligence vs PhishingBox KillPhish for your anti-phishing needs.
GreatHorn Mailbox Intelligence: Email security tool empowering users to identify & report phishing threats. built by GreatHorn. headquartered in United States. Core capabilities include Visual sender and domain trustworthiness indicators, In-email banner notifications for suspicious messages, User-initiated phishing reporting capabilities..
PhishingBox KillPhish: Email threat scanning and reporting add-in for Microsoft 365 and Google. built by PhishingBox. headquartered in United States. Core capabilities include AI-powered email threat scanning and analysis, Email risk scoring based on multiple threat indicators, Phishing email reporting button for users..
Both serve the Anti-Phishing market but differ in approach, feature depth, and target audience.
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