Website Checker Tech - WebsiteChecker.Tech is SaaS tool that detects SEO and availability issues of your website, making it easier for you to fix them.
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.
SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Sitechecker - All-in-one SEO platform including rank tracker, website SEO audit tool and website changes monitoring. Detailed reports by 100+ parameters with how-to-fix guides.
Better Uptime - We call you when your website goes down