Cloud Based Help / Customer Support Platforms

https://www.intercom.com/pricing?current_tab=support_tab
Customer Support Solution - Help your customers with real-time support and an integrated help center
$87 per month Essential - Manage conversations from email and chat, Collaborate as a team to solve support questions, Create a help center to answer common questions, Integrate with Hubspot, Google and more
$127 per month Pro - All of Essential plus: Automate conversation assignment and workflows, Integrate conversations from social channels, Control who sees the Messenger and when, Integrate with Salesforce, Zendesk, Github and more