GreatHorn Mailbox Intelligence is a commercial anti-phishing solution by GreatHorn. Phishing Catcher 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
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.
GreatHorn Mailbox Intelligence fits if you want a cloud product.
Phishing Catcher fits if you need to run it on your own servers, you need a free product and you want an open-source product.
Common questions when comparing GreatHorn Mailbox Intelligence vs Phishing Catcher for anti-phishing.
GreatHorn Mailbox Intelligence: Email security tool empowering users to identify & report phishing threats. Built by GreatHorn.
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.
GreatHorn Mailbox Intelligence is made by GreatHorn. 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. GreatHorn Mailbox Intelligence and Phishing Catcher are both Anti-Phishing products. Key differences: GreatHorn Mailbox Intelligence 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.
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Updated 2026-11-02
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