Notes · Journal · Projects
All your thoughts in one place. Write, speak or link – search and tags keep your memory in order.
Sign-in required – only you can see your notes.
Second Brain Box is a private second brain app where you keep your notes, ideas, daily journal, projects and tasks. It works in the browser on your computer, phone and tablet, and everything is stored securely in the cloud.
Write in Markdown, add tags and connect thoughts with [[links]].
One entry per day that saves automatically as you type.
Kanban board, priorities and deadlines keep work and home projects on track.
Dictate a thought on your phone or Apple Watch and it becomes text.
Ask questions about your own notes and get answers with sources.
Your data is visible only to you. AI never changes anything without your approval.
It is for anyone who wants their thoughts, work and everyday reminders in one place: entrepreneurs, managers, students and anyone looking for a simple, private note-taking app. You can also import your ChatGPT and Claude conversations and export all your data as Markdown files at any time.
Learn more in the user guide or on the note-taking app page.
Start free. Plus gives active users more AI-powered searches.
€0
forever
7 € / month
or €60 / year
14-day free trial