Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Slaask - Slaask enables you to set up a dedicated live chat channel on your Slack.
Crisp Chat - Multi-channel customer support software
JivoChat - JivoChat is a live chat that enables you to talk to visitors on your website
Chatlio - When you have a business to run, your average instant messaging software just will not do. You need an internal presence upon which your entire team can collaborate on. Read more about Chatlio.
Chatra - Live chat software that helps to increase revenue and collect feedback providing an easy way for website owners to talk to visitors in real time.