Ryte - Ryte is a web-based software invented for technical optimization for search engines and improvement of websites.
Optimizely - A/B testing you'll actually use.
Siteimprove - Consider the Siteimprove Intelligence Platform the newest member of your team.
VWO - Use VWO to tweak, optimize & personalize your website with minimal IT help.
Koalati - Automated website testing and quality control tools for developers and agencies.
Google Analytics - Improve your website to increase conversions, improve the user experience, and make more money using Google Analytics. Measure, understand and quantify engagement on your site with customized and in-depth reports.