Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Talkus - Chat with your website users from Slack
Mutiny - Personalize your website for each visitor
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.
Clearbit Company Logo API - Get any site's company logo with just a URL
Crisp Chat - Multi-channel customer support software