Website Grader - Grade your website's strengths and weaknesses in seconds.
SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.
Smaller - Make your websites load faster
Lumar - (Previously DeepCrawl) Hosted SEO spider to analyze and find problems with websites.
Screaming Frog SEO Spider - The Screaming Frog SEO Spider is a small desktop program (PC or Mac) which crawls websites’ links...
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.