Virusdie - All-in-One cloud-based, simple, powerful and gorgeous website security tools built for everyone.
Qualys - Qualys helps your business automate the full spectrum of auditing, compliance and protection of your IT systems and web applications.
Sucuri - Website Protection, Malware Removal, and Blacklist Prevention
Nessus - Nessus Professional is a security platform designed for businesses who want to protect the security of themselves, their clients, and their customers.
Wordfence - Comprehensive security plugin for WordPress.
AlienVault USM (from AT&T Cybersecurity) - AlienVault USM Anywhere delivers powerful threat detection, incident response, and compliance management for cloud, on-premises, and hybrid environments.