Egress Defend is a commercial anti-phishing solution by KnowBe4. Phishing Catcher 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
Catch possible phishing domains in near real time by looking for suspicious TLS certificate issuances reported to the Certificate Transparency Log (CTL) via the CertStream API.
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Based on what each listing shows: deployment, company size, price and open source.
Egress Defend fits if you want a cloud product.
Phishing Catcher fits if you need to run it on your own servers, you are a startup, you need a free product and you want an open-source product.
Common questions when comparing Egress Defend vs Phishing Catcher for anti-phishing.
Egress Defend: AI-powered anti-phishing solution for Microsoft 365 with behavioral detection. Built by KnowBe4.
Phishing Catcher: Catch possible phishing domains in near real time by looking for suspicious TLS certificate issuances reported to the Certificate Transparency Log (CTL) via the CertStream API.
The table above shows where their features, integrations, deployment and company size fit differ.
Egress Defend is made by KnowBe4. Phishing Catcher is open-source with 1,757 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 Phishing Catcher are both Anti-Phishing products. Key differences: Egress Defend is Commercial while Phishing Catcher is Free, Phishing Catcher 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 2026-11-02
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