Sumo prides itself on effective and simple to use software, and the List Builder application definitely meets these standards. For customised, timed or at-click popups optimised for mobile devices, templates, A/B testing and integration with a wide range of email service providers, you can’t go far wrong. Pricing is very competitive and based on business size, although you definitely get more features as you work your way up. However, prices are very competitive. Plugins for Shopify, Magento, WordPress, BigCommerce and Google Tag Manager are also available.