Live chat system is a must for online stores. The customers or visitors can easily chat with the support system and can clear their doubts and problems. This is an unlimited version of Live Chat which means you can install it in any number of domains without any limitation. It is very lightweight and fast. It has support for WPML and SSL. It also has email notification system built-in, in case a new visitor comes online. Please note that you need to have a free Firebase account in order to use this plugin.