Notion

For internal documentation, Notion is our single source of truth. Though, we try to be as transparent as possible with our employee handbook, there's a lot of project documentation and some internal processes (e.g. ordering new hardware) for which an employee-only wiki is the better tool.

Some teams might use tools like Lucid Chart, Miro, or whatever else fits for their current challenges. However, each team is obliged to make documentation accessible in Notion. This means, when using different tools, make sure you share a link within the documentation, or better, look for a Notion plugin to embed the information stored in a different tool.