# KnowBe4 DefendTM Advanced Inbound Email Threat Defense vs ReliaQuest GreyMatter Phishing Analyzer: side-by-side comparison (2026) [KnowBe4 DefendTM Advanced Inbound Email Threat Defense](https://cybersectools.com/tools/knowbe4-defendtm-advanced-inbound-email-threat-defense) is a commercial [anti-phishing](https://cybersectools.com/categories/anti-phishing) solution by [KnowBe4](https://cybersectools.com/companies/knowbe4). [ReliaQuest GreyMatter Phishing Analyzer](https://cybersectools.com/tools/reliaquest-greymatter-phishing-analyzer) is a commercial [anti-phishing](https://cybersectools.com/categories/anti-phishing) solution by [ReliaQuest](https://cybersectools.com/companies/reliaquest). Features, integrations, deployment and the company behind each one, side by side. ## Side-by-side comparison | | KnowBe4 DefendTM Advanced Inbound Email Threat Defense | ReliaQuest GreyMatter Phishing Analyzer | |---|---|---| | Pricing model | Commercial | Commercial | | Category | Anti-Phishing | Anti-Phishing | | Verified | No | No | | Deployment type | Cloud | Cloud | | Company size fit | SMB, Mid-Market, Enterprise | SMB, Mid-Market, Enterprise | | Company | KnowBe4 | ReliaQuest | | Headquarters | – | – | ### Use cases and capabilities | | KnowBe4 DefendTM Advanced Inbound Email Threat Defense | ReliaQuest GreyMatter Phishing Analyzer | |---|---|---| | Ransomware Prevention | Yes | – | | Security Orchestration | – | Yes | ### Core features **KnowBe4 DefendTM Advanced Inbound Email Threat Defense** 10 features listed. Sign in on the page to see them. **ReliaQuest GreyMatter Phishing Analyzer** 10 features listed. Sign in on the page to see them. ### Integrations **KnowBe4 DefendTM Advanced Inbound Email Threat Defense** 3 integrations listed. Sign in on the page to see them. **ReliaQuest GreyMatter Phishing Analyzer** 9 integrations listed. Sign in on the page to see them. ## KnowBe4 DefendTM Advanced Inbound Email Threat Defense vs ReliaQuest GreyMatter Phishing Analyzer FAQ Common questions when comparing KnowBe4 DefendTM Advanced Inbound Email Threat Defense vs ReliaQuest GreyMatter Phishing Analyzer for anti-phishing. ### What is the difference between KnowBe4 DefendTM Advanced Inbound Email Threat Defense and ReliaQuest GreyMatter Phishing Analyzer? **KnowBe4 DefendTM Advanced Inbound Email Threat Defense**: AI-powered email security detecting phishing attacks missed by traditional tools. Built by KnowBe4. **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. ### Who makes KnowBe4 DefendTM Advanced Inbound Email Threat Defense and ReliaQuest GreyMatter Phishing Analyzer? **KnowBe4 DefendTM Advanced Inbound Email Threat Defense** is made by KnowBe4. **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. ### Is KnowBe4 DefendTM Advanced Inbound Email Threat Defense a good alternative to ReliaQuest GreyMatter Phishing Analyzer? Often, yes. KnowBe4 DefendTM Advanced Inbound Email Threat Defense and ReliaQuest GreyMatter Phishing Analyzer are both Anti-Phishing products. Use the table above to see where features, deployment and company size fit differ. ## Related comparisons - [KnowBe4 DefendTM Advanced Inbound Email Threat Defense vs IronVest InboxGuard](https://cybersectools.com/compare/ironvest-inboxguard-vs-knowbe4-defendtm-advanced-inbound-email-threat-defense) - [KnowBe4 DefendTM Advanced Inbound Email Threat Defense vs Egress Defend](https://cybersectools.com/compare/egress-defend-vs-knowbe4-defendtm-advanced-inbound-email-threat-defense) - [KnowBe4 DefendTM Advanced Inbound Email Threat Defense vs Mailinblack Protect](https://cybersectools.com/compare/knowbe4-defendtm-advanced-inbound-email-threat-defense-vs-mailinblack-protect) - [ReliaQuest GreyMatter Phishing Analyzer vs IronVest InboxGuard](https://cybersectools.com/compare/ironvest-inboxguard-vs-reliaquest-greymatter-phishing-analyzer) - [ReliaQuest GreyMatter Phishing Analyzer vs Egress Defend](https://cybersectools.com/compare/egress-defend-vs-reliaquest-greymatter-phishing-analyzer) - [ReliaQuest GreyMatter Phishing Analyzer vs Mailinblack Protect](https://cybersectools.com/compare/mailinblack-protect-vs-reliaquest-greymatter-phishing-analyzer) ## Alternatives to each - [See all KnowBe4 DefendTM Advanced Inbound Email Threat Defense alternatives](https://cybersectools.com/alternatives/knowbe4-defendtm-advanced-inbound-email-threat-defense) - [See all ReliaQuest GreyMatter Phishing Analyzer alternatives](https://cybersectools.com/alternatives/reliaquest-greymatter-phishing-analyzer) --- Source: https://cybersectools.com/compare/knowbe4-defendtm-advanced-inbound-email-threat-defense-vs-reliaquest-greymatter-phishing-analyzer For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/knowbe4-defendtm-advanced-inbound-email-threat-defense.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md. More on KnowBe4 DefendTM Advanced Inbound Email Threat Defense and ReliaQuest GreyMatter Phishing Analyzer: funding, momentum, hiring and news, plus the full product and company record, are available through the Mandos MCP Server (paid plans), which connects to AI assistants: https://mandos.io/mcp?utm_source=cybersectools.com&utm_medium=compare-md