First up is TheBrain. This digital workspace lets you organize and visualize your ideas, files and life with a scalable and secure foundation. It's got AI-powered brainstorming, visual collaboration, file management with version history, and instant search. TheBrain is available for Windows, macOS, iOS and Android, and you can try it with a free version and a 30-day Pro version.
Another top contender is Notion. Notion is an all-in-one workspace that combines elements of many work apps into one. It's got AI-powered data visualization, a drag-and-drop interface, and customizable blocks for organizing information. Notion is flexible enough to accommodate everything from company wikis to project roadmaps to personal notes. It's free to use, though you can pay for AI add-ons.