Guardian Digital AlternativesAnti-Spam Tools and other similar apps like Guardian Digital

Guardian Digital is described as 'EnGarde Cloud Email Security secures against email threats like phishing, zero-day exploits, and debilitating ransomware attacks that define the modern threat landscape email users face every day' and is a Anti-Spam tool in the security & privacy category. There are 2 alternatives to Guardian Digital, not only websites but also apps for iPhone. The best Guardian Digital alternative is SpamCop, which is free.