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.

Smaller - Make your websites load faster

SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.

Website Grader - Grade your website's strengths and weaknesses in seconds.

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.

Checkbot - Checkbot will boost the SEO, speed and security of your site by checking you're following 50+ web best practices. Browser extension with free and paid plans.