Your whole brain.Free, forever.

Unlimited thoughts. Unlimited brains. Every feature. Every platform. No expiration, no account required.

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Wondering why we're doing this? A note from our founder →

Free App

The complete app.All features.

Everything you need to build, navigate, and grow a real knowledge graph on your own machine. Yours forever.

$0forever

Download

Personal and commercial use. No account required.

Everything included:

Unlimited thoughts, links, and brains
Unlimited local notes, images, file attachments, and web links
All features — advanced views, API access, and more
Unlimited public Brains — sync and share for free
Free sync for up to 1,000 thoughts in private Brains
100 MB of synced attachment storage across all Brains (local attachments are unlimited)
Limited AI usage (small daily allowance)

When you're ready for more

Your brain, everywhere.
Thinking with you.

Sync across devices, take it on your phone, and bring Cerebro AI fully into your workflow. Optional, never required.

Pro Service

Your brain, everywhere it goes.

$15/ month

Billed at $180 / year

Save 7%

Includes:

Unlimited private sync
Cerebro AI usage
30 GB of online storage
One-on-one support
Secure encrypted backup

TeamBrain

One brain. Your whole team.

$25per person / month

Billed at $299 per person / year

Save 16%

Everything in Pro Service, plus:

Multi-user editing & sync
Unlimited shared brains
100 GB of online storage
Per user reporting and auditing
Priority support

Max Service

More AI. More room to think.

$40/ month

Billed at $479 / year

Save 20%

Everything in TeamBrain, plus:

4× Cerebro AI usage
250 GB of online storage
Priority support
Unlimited sync devices
Early access to new features

Enterprise

Need on-premises server deployment? We've got you covered.

Talk to sales →

Compare all plans in detail →

Already a customer?

Enter your account email and we'll send you a link to see the offers available to you.

Don't know which email? Open TheBrain and check Settings › User › Account, which shows your account email. Still stuck? Contact support@thebrain.com or call +1-310-751-5000.

Order by phone:+1-310-751-50008:00 AM – 5:00 PM Pacific · Online orders 24×7

Build your brain.It's yours.

Free forever. Yours forever. Download in 30 seconds and start thinking.

Download TheBrainWindows · Mac · Linux · iOS · Android · Web