NetSupport Protect VS Proofpoint

Falcon Sandbox - Submit malware for analysis with Falcon Sandbox and Hybrid Analysis technology. CrowdStrike develops and licenses analysis tools to fight malware.

Mimecast Gateway - Mimecast Gateway is a SaaS-based email security solution that uses sophisticated, multi-layered detection engines and intelligence to protect email data and employees from malware, spam, advanced threats and zero-day attacks.

Malwarebytes - Malwarebytes protects you against malware, ransomware, and other advanced online threats that have made antivirus obsolete and ineffective. Free Anti-Malware & Malware .

dmarcian - Safeguard your email from abuse

SentryBay EntryProtect - Malware Protection

Hornetsecurity - Hornetsecurity offers you comprehensive, integrated managed e-mail security services.