GreatHorn Mailbox Intelligence is a commercial Anti-Phishing solution by GreatHorn. NotifySecurity is a free Anti-Phishing solution. Features, integrations, deployment and the company behind each one, side by side.
Email security tool empowering users to identify & report phishing threats
An Outlook add-in that enables one-click reporting of suspicious emails to security teams with integrated statistics tracking and SMTP header collection.
See more solutions in this category, or build a security stack from your picks.
Based on what each listing shows: deployment, company size, price and open source.
GreatHorn Mailbox Intelligence fits if you are a startup.
NotifySecurity fits if you need a free product and you want an open-source product.
Common questions when comparing GreatHorn Mailbox Intelligence vs NotifySecurity for Anti-Phishing.
GreatHorn Mailbox Intelligence: Email security tool empowering users to identify & report phishing threats, built by GreatHorn.
NotifySecurity: An Outlook add-in that enables one-click reporting of suspicious emails to security teams with integrated statistics tracking and SMTP header collection.
The table above shows where their features, integrations, deployment and company size fit differ.
GreatHorn Mailbox Intelligence is made by GreatHorn. NotifySecurity is open-source with 133 GitHub stars. 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 NotifySecurity are both Anti-Phishing products. Key differences: GreatHorn Mailbox Intelligence is Commercial while NotifySecurity is Free, NotifySecurity is open-source. 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 2026-11-01
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