A/B testing is a crucial component to building great websites that convert traffic to leads. For proof, just take a look at Jay Thompson’s conversion optimization presentation from WordCamp Phoenix. Tiny tweaks can result in huge boosts in conversion — and without testing those changes, you’ll never discover them.

Pretty much every major website does A/B testing regularly (I know from experience Zillow is constantly testing – which resulted in their new simplified home page), and good website design companies are no different. At Virtual Results, we use the ShrimpTest plugin for many of our tests. The plugin is developed by WordPress’s parent company, Automattic – which means it’ll be a reliable plugin to use with WordPress for a long time to come.

For those of you managing your own website, what tools are you using to A/B test your site?