I'm a Zurb Foundation user, as well as a Bootstrap user and they both have their sweet spots. Bootstrap is great for internal tools and applications that don't

I'm a Zurb Foundation user, as well as a Bootstrap user and they both have their sweet spots. Bootstrap is great for internal tools and applications that don't need a ton of customization. Foundation on the other hand is extremely customizable based on tweaking some Sass variables. I suspect this comes out of their respective origins. Twitter was building internal tools, while Zurb is an agency which builds a lot of different externally facing sites. This also means that Bootstrap is an easier fit for a lot of HN readers.