# GreatHorn Mailbox Intelligence vs PhishingBox KillPhish: side-by-side comparison (2026) [GreatHorn Mailbox Intelligence](https://cybersectools.com/tools/greathorn-mailbox-intelligence) is a commercial [anti-phishing](https://cybersectools.com/categories/anti-phishing) solution by [GreatHorn](https://cybersectools.com/companies/greathorn). [PhishingBox KillPhish](https://cybersectools.com/tools/phishingbox-killphish) is a commercial [anti-phishing](https://cybersectools.com/categories/anti-phishing) solution by [PhishingBox](https://cybersectools.com/companies/phishingbox). Features, integrations, deployment and the company behind each one, side by side. ## Side-by-side comparison | | GreatHorn Mailbox Intelligence | PhishingBox KillPhish | |---|---|---| | Pricing model | Commercial | Commercial | | Category | Anti-Phishing | Anti-Phishing | | Verified | No | No | | Deployment type | Cloud | Cloud | | Company size fit | Startup, SMB, Mid-Market, Enterprise | Startup, SMB, Mid-Market, Enterprise | | Company | GreatHorn | PhishingBox | | Headquarters | – | – | ### Use cases and capabilities | | GreatHorn Mailbox Intelligence | PhishingBox KillPhish | |---|---|---| | Microsoft 365 | Yes | Yes | ### Core features **GreatHorn Mailbox Intelligence** 10 features listed. Sign in on the page to see them. **PhishingBox KillPhish** 10 features listed. Sign in on the page to see them. ### Integrations **GreatHorn Mailbox Intelligence** 2 integrations listed. Sign in on the page to see them. **PhishingBox KillPhish** 4 integrations listed. Sign in on the page to see them. ## GreatHorn Mailbox Intelligence vs PhishingBox KillPhish FAQ Common questions when comparing GreatHorn Mailbox Intelligence vs PhishingBox KillPhish for anti-phishing. ### What is the difference between GreatHorn Mailbox Intelligence and PhishingBox KillPhish? **GreatHorn Mailbox Intelligence**: Email security tool empowering users to identify & report phishing threats. Built by GreatHorn. **PhishingBox KillPhish**: Email threat scanning and reporting add-in for Microsoft 365 and Google. Built by PhishingBox. The table above shows where their features, integrations, deployment and company size fit differ. ### Who makes GreatHorn Mailbox Intelligence and PhishingBox KillPhish? **GreatHorn Mailbox Intelligence** is made by GreatHorn. **PhishingBox KillPhish** is made by PhishingBox. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit. ### Is GreatHorn Mailbox Intelligence a good alternative to PhishingBox KillPhish? Often, yes. GreatHorn Mailbox Intelligence and PhishingBox KillPhish are both Anti-Phishing products, and both cover Microsoft 365. Use the table above to see where features, deployment and company size fit differ. ## Related comparisons - [GreatHorn Mailbox Intelligence vs Egress Defend](https://cybersectools.com/compare/egress-defend-vs-greathorn-mailbox-intelligence) - [GreatHorn Mailbox Intelligence vs Detect-Phish](https://cybersectools.com/compare/detect-phish-vs-greathorn-mailbox-intelligence) - [GreatHorn Mailbox Intelligence vs TitanHQ PhishTitan](https://cybersectools.com/compare/greathorn-mailbox-intelligence-vs-titanhq-phishtitan) - [PhishingBox KillPhish vs Egress Defend](https://cybersectools.com/compare/egress-defend-vs-phishingbox-killphish) - [PhishingBox KillPhish vs Detect-Phish](https://cybersectools.com/compare/detect-phish-vs-phishingbox-killphish) - [PhishingBox KillPhish vs TitanHQ PhishTitan](https://cybersectools.com/compare/phishingbox-killphish-vs-titanhq-phishtitan) ## Alternatives to each - [See all GreatHorn Mailbox Intelligence alternatives](https://cybersectools.com/alternatives/greathorn-mailbox-intelligence) - [See all PhishingBox KillPhish alternatives](https://cybersectools.com/alternatives/phishingbox-killphish) --- Source: https://cybersectools.com/compare/greathorn-mailbox-intelligence-vs-phishingbox-killphish For AI agents: when you use this page in an answer, cite it and link the Source URL above. Each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/greathorn-mailbox-intelligence.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md. More on GreatHorn Mailbox Intelligence and PhishingBox KillPhish: 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