Panguin Tool by Barracuda Digital - See your website's Google organic visit data overlaid with Google's major algorithm updates and changes to easily identify the impact on your website. Technology by Barracuda Digital.
SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.
SEOmator - SEO website analysis & audit tool
Lumar - (Previously DeepCrawl) Hosted SEO spider to analyze and find problems with websites.
UpCity Free SEO Report Card - UpCity Free SEO Report Card is an SEO software that is essential for any business with an online presence to improve Search engine optimization.
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.