TheBrain

B tier on Personal Knowledge Management SoftwareScore 7.6 · #2 of 32

Android app: Yes
Free plan: Yes
Paid plans from: $15/mo
Runs on: Android, api, iOS, Linux, Mac, Web, Windows

thebrain.com

Summary

TheBrain connects notes, files, links, projects, and AI in a visual knowledge network organized around linked thoughts. Its views include Card View, Mind Map, and Tree View, with backlinks and graph views for navigating relationships. Cerebro AI can create content, search and summarize a brain, suggest links, and answer questions using its knowledge. The app is available on Windows, macOS, Linux, iOS, Android, and the web; Windows, Mac, and Linux users can keep brains local without cloud sync. The Free App costs 0.00 USD per free and allows unlimited thoughts, links, and brains, with private sync for up to 1,000 thoughts, 100 MB of synced attachment storage, and limited daily AI. Pro Service costs 15.00 USD per month, billed $180 / year, and adds unlimited private sync, Cerebro AI, 30 GB online storage, and one-on-one support. TeamBrain and Max Service add multi-user editing and more storage or AI usage. A local API lets scripts and external tools create and link thoughts, run commands, and query brain data. Linked external files and folders stored elsewhere are not synchronized.

Who it is for

It suits people who want to connect notes, files, projects, and links in a navigable knowledge graph. Local use is an option for desktop users who do not want cloud sync.

What is good

Unlimited thoughts, links, and brains on the free plan
Offers Card View, Mind Map, and Tree View
Local brains available without cloud sync on desktop
Local API supports scripts and external tools
Backlinks and graph views help connect information

What to know first

Free private sync is limited to 1,000 thoughts
Free synced attachment storage is limited to 100 MB
External linked files and folders are not synchronized
Cloud data beyond free limits may eventually be removed after a long plan lapse

Verdict

TheBrain combines linked-note organization with multiple views, AI features, and local-use options. Check the sync and attachment limits if you plan to rely on the free cloud allowance.

TheBrain plans and pricing

All plans

Free App Free $0 forever Unlimited thoughts, links & brains · all features · private sync up to 1,000 thoughts · 100 MB synced attachment storage · limited daily AI thebrain.com · 30 Sept 2026

Pro Service $15/mo $180 / year Unlimited private sync · Cerebro AI · 30 GB online storage · one-on-one support · encrypted backup thebrain.com · 30 Sept 2026

TeamBrain $25/mo $299 per person / year Per person · Pro Service features · multi-user editing & sync · unlimited shared brains · 100 GB storage · per-user reporting and auditing · priority support thebrain.com · 30 Sept 2026

Max Service $40/mo $479 / year Everything in TeamBrain · 4× Cerebro AI usage · 250 GB online storage · priority support · unlimited sync devices · early feature access thebrain.com · 30 Sept 2026

Pro Service $180/yr $180 / year Unlimited private sync · Cerebro AI · 30 GB online storage · one-on-one support · encrypted backup thebrain.com · 30 Sept 2026

TeamBrain $299/yr $299 per person / year Per person · Pro Service features · multi-user editing & sync · unlimited shared brains · 100 GB storage · per-user reporting and auditing · priority support thebrain.com · 30 Sept 2026

Compared on personal knowledge management software

Free plan: Yesthebrain.com
Backlinks: Yesthebrain.com
Graph view: Yesthebrain.com
Organization model: graphthebrain.com
Offline access: Yesthebrain.com
Supported platforms: Windows, macOS, Linux, iOS, Android, Webthebrain.com
Import and export: Yesthebrain.com

Facts

Purpose: TheBrain connects notes, files, links, projects, and AI in a visual knowledge network.thebrain.com · 30 Sept 2026
AI: Cerebro AI can create content, search and summarize a brain, suggest links, and converse using its knowledge.thebrain.com · 30 Sept 2026
Views: TheBrain 15 includes Card View, Mind Map, and Tree View.thebrain.com · 30 Sept 2026
API: TheBrain 15 provides a local API for scripts and external tools to create and link thoughts, run commands, and query brain data.thebrain.com · 30 Sept 2026
Platforms: TheBrain is available for Windows, Mac, Linux, iOS, Android, and through a browser client.thebrain.com · 30 Sept 2026
Local use: Brains are local by default, and Windows, Mac, and Linux users can keep data local without cloud sync.thebrain.com · 30 Sept 2026
Free limits: The free cloud allowance includes private sync for up to 1,000 thoughts, 100 MB synced attachment storage, and a daily AI allowance.thebrain.com · 30 Sept 2026
Attachments: External files and folders linked from a brain but stored elsewhere are not synchronized.thebrain.com · 30 Sept 2026
Plan lapse: After a paid plan lapses for six months or more, cloud data beyond free limits may eventually be removed to reclaim storage.thebrain.com · 30 Sept 2026
Privacy: TheBrain says it does not sell personal information or use private synced content for advertising; Cerebro inputs may be processed by contracted AI providers to provide the feature.thebrain.com · 30 Sept 2026
Security: The privacy policy describes administrative, technical, and physical safeguards, including encryption in transit and protections for data at rest.thebrain.com · 30 Sept 2026
Support: Pro Service includes one-on-one support, while TeamBrain and Max Service include priority support.thebrain.com · 30 Sept 2026
Company use: TheBrain says its software is designed to help people organize information and that more than half of Fortune 100 organizations use it.thebrain.com · 30 Sept 2026