Confluence is built for sharing public and internal technical documentation. It’s part of the Atlassian suite and integrates well with Atlassian tools like Jira and Trello.

Help authoring software or a help authoring tool (HAT) is a specialized content development program designed to create, manage, and distribute support documentation such as instruction manuals

Saving time and money : HAT allows technical writers to create and update content more efficiently, saving time and reducing the costs associated with developing documentation.