At the moment we have an integration with Slack. You link a document to a new channel (private or public) and our Slackbot will then send notifications to that channel when new questions, arguments, and comments are added, a decision is made or poked.
We are also working on integrations with issue tracking tools, e.g. JIRA and Trello. Next up is JIRA which we will be ready in Nov/Dec 2017.
Please comment below if there are any other integrations that you would like us to look into.