AWS CloudTrail - AWS CloudTrail is a web service that records AWS API calls for your account and delivers log files to you.
Pingdom - With website monitoring from Pingdom you will be the first to know when your website is down. No installation required. 30-day free trial.
Logmatic - Logmatic is a log centralization, analytics & visualization platform to improve software & business performance.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Serilog - Backend Development and Utilities
Better Uptime - We call you when your website goes down