What it does
TheBrain organizes information as linked “thoughts” in a navigable knowledge graph, with notes, web links, and file attachments. Its tutorials show creating parent, child, and jump relationships, editing notes, and attaching web or local files; search, filters, and graph navigation help retrieve material. TheBrain 15 is free across platforms, with free private sync limited to 1,000 thoughts and 100 MB of synced attachments. Paid Pro Service and TeamBrain plans add private sync, storage, and multi-user editing.
TheBrain is useful for people who want notes to remain connected by topic rather than filed only in folders. Begin with a central thought, add related thoughts as parent/child or jump links, and attach notes or source files to the relevant ideas. Dragging a web page or local file into the graph can preserve a reference beside the thought it informs. Later, search and filters narrow the collection, while graph navigation reveals relationships. The free app runs on Windows, Mac, Linux, iOS, Android, and web and does not require an account for local use. Free private sync is limited to 1,000 thoughts and 100 MB of synced attachments. The store displays Pro Service at $15/month billed at $180/year and TeamBrain at $25/person/month billed at $299/person/year; regional currency is not separately identified on the page.
Strengths
- Links thoughts with parent, child, and jump relationships and supports notes and attachments.
- Combines search and filters with graph navigation; local use is free and does not require an account.
Watch out for
- Free private sync is limited to 1,000 thoughts and 100 MB of synced attachments.
- Multi-user TeamBrain editing and larger private sync/storage are paid services.
Best for
- Researchers and planners who connect notes across topics and sources
- Users who want a navigable knowledge graph with local notes and optional synchronized collaboration
Sources
- TheBrain Tutorials - TheBrain (Oct 25, 2026)
- TheBrain 15 — Beyond next-gen, with Cerebro AI (Oct 25, 2026)
- TheBrain Store — Pricing & Plans (Oct 25, 2026)