I noticed this on Udacity, Cloudbric and many smaller sites.<p>A chat box pops up in the bottom right corner of the screen where you can chat with a customer service rep.
There are hundreds of companies that provide this ranging from free to very expensive. This product category is called: Live Chat software.<p>Here's a list of many providers: <a href="https://www.quora.com/What-are-the-best-live-chat-solutions-for-websites" rel="nofollow">https://www.quora.com/What-are-the-best-live-chat-solutions-...</a> . And here is the Quora topic: <a href="https://www.quora.com/topic/Live-Chat-Software-1" rel="nofollow">https://www.quora.com/topic/Live-Chat-Software-1</a> .
Crisp does that, and is able to integrate with Slack to reply to visitors - in addition to its Web dashboard.<p>Website: <a href="https://crisp.im/" rel="nofollow">https://crisp.im/</a><p>Disclosure: I am the co-founder.