TheBrain

About

TheBrain brings notes, files, links, projects, and AI into one visual knowledge network, so you can see relationships, find anything, and think with full context. Instead of forcing your knowledge into folders, pages, or isolated notes, every idea can live in each context where it matters, without duplication.

You can capture notes, files, links, web pages, research, meetings, ideas, and plans in one visual workspace, then connect them across projects, topics, people, timelines, and outcomes. Search returns you to the complete context, including related notes, files, links, people, and connected ideas. Cerebro AI works inside your knowledge to summarize, create, search, suggest links, and help build out areas of your Brain.

Version 15 is now free on desktop and includes Card View, Mind Map, and Tree View for exploring your knowledge from different angles. TheBrain is designed for personal knowledge, projects, research, and teams, and is available for Mac, along with Linux, mobile, and other formats.