SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.
Ryte - Ryte is a web-based software invented for technical optimization for search engines and improvement of websites.
Moz - Backed by industry-leading data and the largest community of SEOs on the planet, Moz builds tools that make inbound marketing easy.
Siteimprove - Consider the Siteimprove Intelligence Platform the newest member of your team.
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.
WooRank - Woorank is a Digital Marketing tool providing Instant Website Reviews & Personalized Tips for driving Traffic, Leads & Sales. Woorank covers: SEO, Mobile rendering, Social Media data, SERP ranking, backlinks, usability & servers optimization.