Optimizely - A/B testing you'll actually use.
SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.
VWO - Use VWO to tweak, optimize & personalize your website with minimal IT help.
HubSpot Marketing Hub - HubSpot is a cloud-based inbound marketing software that allows businesses to transform the way that they market online.
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.
Looker - Looker makes it easy for analysts to create and curate custom data experiences—so everyone in the business can explore the data that matters to them, in the context that makes it truly meaningful.