Phishing Catcher is a free anti-phishing solution. ReliaQuest GreyMatter Phishing Analyzer is a commercial anti-phishing solution by ReliaQuest. Features, integrations, deployment and the company behind each one, side by side.
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.
Automates phishing email analysis, remediation, and user response via AI
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Based on what each listing shows: deployment, company size, price and open source.
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.
ReliaQuest GreyMatter Phishing Analyzer fits if you want a cloud product.
Common questions when comparing Phishing Catcher vs ReliaQuest GreyMatter Phishing Analyzer for anti-phishing.
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.
ReliaQuest GreyMatter Phishing Analyzer: Automates phishing email analysis, remediation, and user response via AI. Built by ReliaQuest.
The table above shows where their features, integrations, deployment and company size fit differ.
Phishing Catcher is open-source with 1,757 GitHub stars. ReliaQuest GreyMatter Phishing Analyzer is made by ReliaQuest. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.
Often, yes. Phishing Catcher and ReliaQuest GreyMatter Phishing Analyzer are both Anti-Phishing products. Key differences: Phishing Catcher is Free while ReliaQuest GreyMatter Phishing Analyzer is Commercial, 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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