Service like Optimizely's visual editor to design site?

November 19, 2014 2:04 PM

I've learned that Optimizely has a pretty neat editor for designing a/b tests and that you can use the editor to do lots of fast and easy re-designs without modifying a site's code. Are there any services that solely focus on the "use our editor to re-design your site and paste this javascript to implement the design" bit?
posted by Foci for Analysis to Computers & Internet