notion.so vs Org Mode: What are the differences?
What is notion.so? A unified workspace for docs, wikis, and tasks – designed for modern teams. A new tool that blends your everyday work apps into one. It's a unified and collaborative workspace for you and your team.
What is Org Mode? Org: an Emacs Mode for Notes, Planning, and Authoring. Org mode is for keeping notes, maintaining TODO lists, planning projects, and authoring documents with a fast and effective plain-text system.
notion.so and Org Mode can be primarily classified as "Project Management" tools.
Org Mode is an open source tool with 3 GitHub stars and 3 GitHub forks. Here's a link to Org Mode's open source repository on GitHub.