LiveChat http://drupal.org/node/3028442

LiveChat is a provider of cloud-based customers service platform with live support, ticketing system and chat bot capabilities. The main aim of LiveChat is to improve customer service and increase sales opportunities. We help over 26,000 businesses from around the world, ranging from bootstrapped startups to global enterprises, to communicate with their customers better.

LiveChat is a cloud-based live chat and messaging platform through which businesses can provide a delightful experience for customers across the entire customer lifecycle, from the first moment a visitor lands on the website, to handling customer support issues long after a customer has signed up.

We’ve been a member of the Drupal.org community for more than eight years now, developing modules that embed the LiveChat code into Drupal.

Keeping up with the current version of Drupal core has always been our priority; our publicly available modules are compatible with:
Drupal 6 - https://www.livechatinc.com/files/plugins/drupal/livechat_drupal_6.zip
Drupal 7 - https://www.livechatinc.com/files/plugins/drupal/livechat_drupal_7.zip
Drupal 8 - https://www.livechatinc.com/files/plugins/drupal/livechat_drupal_8.zip

Here’s the support documentation for the latest release - https://www.livechatinc.com/kb/drupal-add-livechat-website/

Our API is opened, and well documented here https://developers.livechatinc.com/docs/ — we work closely with third parties helping them build on our platform - https://www.drupal.org/project/livechat