GitBook provides developers and teams with a modern documentation format and toolchain using Git and Markdown. With GitBook, you and your team can create beatiful documentaion with minimal effort. The software integrates with Slackand other third-party software, allowing users of GitBook to easily search and share information that is part of their documentation. GitBook was first created as an open-source CLI tool but is now offered as a SaaS, making it easier than ever to start a GitBook for your project.