Sitebeam - Spelling mistakes, SEO, load speed, social media, code, W3C, accessibility & more in one tool.
Condorly - Condorly offers conversion rate optimization and personalization services to turn most website visitors into qualified leads.
Ryte - Ryte is a web-based software invented for technical optimization for search engines and improvement of websites.
RankScience - Advanced Content Optimization Software for SEO
Monsido - Monsido is an all-in-one platform that delivers the insights you need to build a better web experience for your visitors
SISTRIX - SISTRIX toolbox is an SEO tool for professionals helping reputable companies to constantly improve their websites.