Egress Defend is a commercial Anti-Phishing solution by KnowBe4. NotifySecurity is a free Anti-Phishing solution. Features, integrations, deployment and the company behind each one, side by side.
AI-powered anti-phishing solution for Microsoft 365 with behavioral detection
An Outlook add-in that enables one-click reporting of suspicious emails to security teams with integrated statistics tracking and SMTP header collection.
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Based on what each listing shows: deployment, company size, price and open source.
NotifySecurity fits if you need a free product and you want an open-source product.
Common questions when comparing Egress Defend vs NotifySecurity for Anti-Phishing.
Egress Defend: AI-powered anti-phishing solution for Microsoft 365 with behavioral detection, built by KnowBe4.
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.
Egress Defend is made by KnowBe4. 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. Egress Defend and NotifySecurity are both Anti-Phishing products. Key differences: Egress Defend 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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