Egress Defend vs GreatHorn Mailbox Intelligence: side-by-side comparison (2026)

Egress Defend: AI-powered anti-phishing solution for Microsoft 365 with behavioral detection. Built by KnowBe4.

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

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

Egress Defend is made by KnowBe4. GreatHorn Mailbox Intelligence is made by GreatHorn. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

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