EAST Anti-Phishing Tool is a free anti-phishing solution by Eye Security. GreatHorn Mailbox Intelligence is a commercial anti-phishing solution by GreatHorn. Features, integrations, deployment and the company behind each one, side by side.
Free anti-phishing tool for M365 that deploys via a custom CSS file in Entra.
Email security tool empowering users to identify & report phishing threats
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Based on what each listing shows: deployment, company size, price and open source.
EAST Anti-Phishing Tool fits if you need a free product.
Common questions when comparing EAST Anti-Phishing Tool vs GreatHorn Mailbox Intelligence for anti-phishing.
EAST Anti-Phishing Tool: Free anti-phishing tool for M365 that deploys via a custom CSS file in Entra. Built by Eye Security.
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.
EAST Anti-Phishing Tool is made by Eye Security. 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. EAST Anti-Phishing Tool and GreatHorn Mailbox Intelligence are both Anti-Phishing products, and both cover Microsoft 365. Key differences: EAST Anti-Phishing Tool is Free while GreatHorn Mailbox Intelligence is Commercial. Use the table above to see where features, deployment and company size fit differ.
No Anti-Phishing shortlist yet. This is the closest one.
Updated 2026-11-02
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