UpDiagram users can create and manage multiple projects. However, if you pay for it, the number of projects you can create will increase, but that's okay, with the free plan you can still create and manage more than 15 different projects.
Free forever. No credit card
Creating many projects is not difficult
You have 3 ways to create a new project, and that will increase the variety of your projects.
Multiple projects but easy to find
You can search for projects based on 6 characteristics "All", "Active", "Favorite", "Archive", "Recent" and "Alphanumeric".