Webflow.com -- hands down. Having used Wix, Squarespace, Weebly and WordPress, Webflow just provides you with so much more control and pixel perfect accuracy.
Although the learning curve is a little higher than SquareSpace/Wix, it's actually worth it. As a non-dev designer, it has allowed us to deploy all our sites effortlessly with the same fluidity and crisp animations as you'd expect from a grassroots buildup. It also allows you to export your (clean) code.
I honestly would never go back to anything. Webflow is how a GUI for website builders should be.
Although the learning curve is a little higher than SquareSpace/Wix, it's actually worth it. As a non-dev designer, it has allowed us to deploy all our sites effortlessly with the same fluidity and crisp animations as you'd expect from a grassroots buildup. It also allows you to export your (clean) code.
I honestly would never go back to anything. Webflow is how a GUI for website builders should be.