PagerDuty - Cloud based monitoring service
Nessus - Nessus Professional is a security platform designed for businesses who want to protect the security of themselves, their clients, and their customers.
OpsGenie - Alerting and On-Call Management for Dev&Ops Teams
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.
Squadcast - Automate incident response, reduce downtime and enhance your tech teams’ delivery with a unified platform.
Tenable.io - Tenable.io Cyber Exposure platform helps to protect any asset on any computing platform and eliminate blind spots.