MD Editor doesn't collect any data whatsoever. Also, it lets you use your own OpenAI key for AI features and key is never stored on our servers. It currently stores most of the data including articles, settings etc. in browser's storage.
The only data that is stored on the cloud is the article's media ie. images and audio. The media is publicly accessible if anyone has a link to it.
Also, MD editor, offers a bunch of little tools to make a tech writer's workflow easier. These tools are related to formatting, code snippets, images, audio, sanity checks, import/export, publishing, etc.
Team collaboration is not currently available but its definitely on the roadmap.