Optimizely - A/B testing you'll actually use.

Mutiny - Personalize your website for each visitor

SplitMetrics - SplitMetrics is the A/B testing platform for App Store and Google Play page to discover the most converting icons, screenshots, video, etc.

Adobe Target - Adobe Target provides an intuitive user interface and an expanded personalization toolset.

Evolv - Evolv is the visual editor for web-based projects that are used to find better ways to connect with customers in order to improve marketing economics.

Markettailor.io - Convert the traffic you already have and reach different B2B customer segments through personalized websites. No code ─ build personalizations in minutes with visual editor and high quality company data.