GreatHorn Mailbox Intelligence vs PhishingBox KillPhish: side-by-side comparison (2026)

GreatHorn Mailbox Intelligence: Email security tool empowering users to identify & report phishing threats. Built by GreatHorn.

PhishingBox KillPhish: Email threat scanning and reporting add-in for Microsoft 365 and Google. Built by PhishingBox.

The table above shows where their features, integrations, deployment and company size fit differ.

GreatHorn Mailbox Intelligence is made by GreatHorn. PhishingBox KillPhish is made by PhishingBox. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

Often, yes. GreatHorn Mailbox Intelligence and PhishingBox KillPhish are both Anti-Phishing products, and both cover Microsoft 365. Use the table above to see where features, deployment and company size fit differ.