TheBrain 15has arrived.
Cerebro AI, a unified interface across every platform, and the biggest performance leap in our history.
TheBrain 15 is now free for everyoneSee plans →Announcing TheBrain 15
Beyond next-gen.
TheBrain 15 is our biggest upgrade ever — a complete generational overhaul. With over 150 new features and improvements, this release is a fundamental leap forward.
Performance
A rebuilt foundation ensures smoother, faster performance for years to come.
Features
Everything you love, improvements to all the core functions, plus flagship capabilities all-new to version 15.
Design
A unified UI layer delivers virtually identical functionality across desktop, mobile, and web. Intuitive and beautiful, it color-shifts to complement your content perfectly.
Stability
Built on technologies with broad support from Apple, Microsoft, and Google — the most reliable version of TheBrain in history.
Enter Cerebro.
Automate almost anything in your brain just by asking for it. Cerebro can do anything you can do — create new content, search your brain, browse for related thoughts, summarize attachments, suggest new links, or even just have a conversation. The only limit is your imagination.
TheBrain 15 highlights.
A complete reimagination. Here are the most exciting new capabilities that will transform how you work with your brain.
Now Free for Everyone
- •The complete app and every feature, free for everyone
- •A free allowance for cloud sync, online storage, and AI
- •Optional Pro, Max, and TeamBrain plans for more sync, storage, AI, and team collaboration
- •Existing licenses keep working, with added loyalty benefits
Cerebro: AI Agent for Your Brain
- •Talk to your brain in plain language – ask questions, create content, and explore ideas conversationally
- •Create new thoughts, notes, and structures on demand
- •Search and surface exactly what you need, when you need it
- •Summarize long notes and attachments into clear overviews
- •Suggest links and relationships to strengthen your knowledge graph
- •Saved, searchable conversation history that travels across brains and devices
- •Floating, dockable AI dialog that remembers your conversation
- •Web search built in for more accurate answers and content
- •Run models locally or privately for full data control
AI Scripting: Automate Your Way
- •Build reusable AI instruction templates, no code required
- •Visual block editor or a full code mode with syntax highlighting
- •Dynamic parameters and IF/ELSE logic with live preview
- •Run scripts from toolbar buttons or with / in chat
- •Built-in variables keep scripts dynamic to the active thought
Cross-Platform Interface Rebuilt
- •Unified modern UI across Windows, Mac, Linux, iOS, Android, and web
- •Immersive design puts your thoughts center stage
- •Adaptive colors follow your brain's theme
- •Now native on Linux
- •The full v15 experience on iOS and Android
- •Full feature parity in the web client
- •Refreshed translations across all 78 languages
Lightning-Fast Performance
- •New engine for both scalability and desktop speed
- •Startup and brain opening in a fraction of the time
- •Immediate response for navigation and content creation
- •Reduced CPU, memory, and energy usage
- •More stable with fewer crashes and smoother long-running sessions
Notes Editor: Markdown Power, Visual Comfort
- •Hybrid WYSIWYG + Markdown – write visually, store as clean markdown
- •Highlight key text with theme-aware == formatting
- •Expanded markdown typing shortcuts for bold, italic, lists, links, and images
- •Dual-level undo – fine-grained edits or whole editing sessions
- •Multi-language spellchecking with nearly 100 languages
- •Improved math support, powerful tables, and faster PDF export
Smart Sync & Light Attachments
- •Average sync more than 50x faster – most syncs under 10 seconds
- •Sync up to 8 brains simultaneously for faster updates
- •Light Sync keeps large attachments in the cloud
- •Fully indexed and searchable, downloaded on demand
- •Per-attachment control over offline availability
Visual Thinking Upgraded
- •Faster, smoother plex animations with fewer resources
- •Drag and drop thoughts into any order you want
- •Presentation Mode for a distraction-free view
- •Show a node's content on hover without leaving the plex
- •Redesigned outline and mind map views – more intuitive and performant
- •Theme editors with real-time previews, synced across devices
Tree View: A Familiar New Way to Navigate
- •Browse your brain as a virtual hierarchy
- •Home, pins, types, and tags as root nodes; children nested below
- •Multiple parents and jumps visualized and expandable
- •Locate the active thought in the tree instantly
Tabs, Windows, and Brain Switching
- •New navigation modes – Tree View and Card View
- •Clean tabs with smooth drag-and-drop to reorder or pop into windows
- •Open unlimited tabs – inactive ones use no CPU or memory
- •Quick brain switcher with favorites first
- •Unified view switcher for split, plex-only, or content-only modes
Smarter Search and Reports
- •Rebuilt ranking surfaces the thought you mean from just a couple of letters
- •Exclusions, quoted phrases, and accent-insensitive matching
- •Matching words highlighted in notes after you pick a result
- •Filter by type, tag, creation date, and more
- •Redesigned reports with simple and advanced modes
Shared Thought Pages
- •Publish any thought as a standalone web page with a unique link
- •Share research, notes, or reference material in one click
- •Pages include content, attachments, and key details
- •No account required – anyone with the link can view
Local API & Automation
- •Drive TheBrain from scripts, AI agents, and external tools
- •Create and link thoughts, run commands, and query brain data
- •Dramatically faster than the cloud API, with real-time results in the app
- •Wire TheBrain into your broader workflows and integrations
Everything new in version 15.
Beyond the highlights, refinements abound throughout the app — from the precise rendering of toolbar icons to the seamless feel of syncing. Explore the complete list below.
See it in action.
TheBrain 15 Pre-Release Overview
Questions, answered.
- Upgrades and licensing
TheBrain 15 is free for everyone — the entire app and every feature is now free, with no license required. Just download and log in.
Cloud services (sync, online storage, and AI) come with a free allowance. Optional Pro, Max, and TeamBrain plans add unlimited thought sync, more attachment storage, expanded AI, and team collaboration. Existing licenses keep working as before, now with added loyalty benefits.
- Compatibility with v14
TheBrain 15 installs alongside TheBrain 14, and your data is backward compatible with one exception.
After a brain has been opened in version 15, it will not automatically open again in v14. This is due to Light Sync, which keeps file attachments in the cloud and downloads them just-in-time for much faster sync while saving space on your device. If you want to move between v15 and v14, disable Light Sync in v15.
Still have questions?
Email support@thebrain.com — we're here to help.
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