Best Hornetsecurity Spamfilter Alternatives ranked by AI · updated Aug 2026

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Hornetsecurity Email Security is a cloud-based filtering service for organizations that need protection against spam, phishing, malware, and other email-borne threats. It supports Microsoft 365 and other mail environments with centralized administration, continuity features, and policy controls.

Developer: Hornetsecurity Price: Quote-based 🎯 hornetsecurity.com/en/services/spam-and-malware-protection

🔒 Email Security Cloud Security Anti-Phishing spam filtering

Top 6 Hornetsecurity Spamfilter alternatives

Microsoft Defender for Office 365

Microsoft

💡 Pick it if your organization already runs Microsoft 365 and wants tightly integrated email threat protection.

Microsoft Defender for Office 365 is a cloud email security service for Microsoft 365 organizations. It adds anti-spam, anti-malware, phishing protection, Safe...

Pros

Deep integration with Exchange Online, Outlook, and Microsoft 365 administration
Includes strong phishing investigation and automated response features
Usually more cost-effective for organizations already licensed for Microsoft 365

Cons

Less suitable for organizations not using Microsoft 365
Administration is more complex than dedicated gateway filters
Some advanced protections require higher-priced plans

From $2/user/mo

Alternatives to Microsoft Defender... → Visit site

Mimecast Email Security

💡 Pick it if you need a mature email gateway with continuity, archiving, and broader security modules.

Mimecast Email Security offers email protection against advanced threats, spam, and data leaks, with continuity features for email availability.

Pros

Robust threat protection
Email continuity features

Cons

Complex setup process for some users

Contact for pricing

Alternatives to Mimecast Email Sec... →

Proofpoint Email Protection

💡 Pick it if advanced protection against targeted attacks and business email compromise matters most.

Proofpoint Email Protection provides advanced threat protection for email, including anti-spam, anti-phishing, and data loss prevention.

Pros

Strong threat intelligence
Integration with other security solutions

Cons

Higher cost for organizations with large email volumes

Custom pricing

Alternatives to Proofpoint Email P... →

Barracuda Email Protection

Barracuda Networks

💡 Pick it if you want a broad email protection suite with continuity and archiving for mixed mail environments.

Barracuda Email Protection is a cloud service for filtering spam, malware, phishing, and impersonation threats in business email. It also provides email...