hdoc vs MadCap Flare

It is a modern documentation tool for C++ with the goal of helping developers create great documentation, painlessly. To accomplish this goal, it automatically generates API documentation, puts Markdown pages alongside your documentation, and lets you search through your documentation interactively. Above all, it is designed to produce great results with minimal configuration and hassle.

It is the professional content authoring tool used by technical writers and documentation specialists to create, manage, and publish content for both print and online documentation.