Spillbox.app
The waiting room for your thoughts.
A safe place to spill your raw thoughts without the pressure of organizing them. Capture ideas instantly, and sort them out later.
"Write down the thoughts of the moment. Those that come unsought for are commonly the most valuable."
— Francis Bacon
The honest reason why we built this
When a thought strikes you, opening a full-featured knowledge base often means waiting for a workspace to load, only to be greeted by a blank page that implicitly asks: "Where does this belong?"
To avoid this organizational tax, many of us resort to sending WhatsApp or Telegram messages to ourselves just to quickly capture thoughts and fleeting ideas.
Spillbox.app is a dedicated tool for that exact behavior. It's a local-first stream that gives you the speed of texting yourself, but designed for notes instead of messages, and to safely bridge back to your main workspace when you're ready.
How it works
Ready to capture instantly
Because there are no complex databases to sync or workspaces to render, the app opens immediately. It’s just you and a blinking cursor.
Zero organizational tax
Open the app, type your thought, and hit send. No titles, no folders, and no blank-page anxiety. Everything lands in a simple chronological stream.
A bridge to your workspaceComing soon
Keep using Notion or Obsidian for your heavy lifting. The app is just the frictionless capture layer. Set up integrations to automatically route your stream to your main system.
Your notes stay yours
Local-first and private
Your notes live solely on your device by default. Whether you’re on the subway or deep in the woods, you can always review them or capture a thought offline.
Optional, encrypted syncComing soon
If you want your stream across multiple devices, our sync is end-to-end encrypted. We can’t read your notes, and we don’t want to.
No AI for your raw thoughts
There are no ghostwriters analyzing your rawest mental drafts to suggest autocompletions. It’s deliberately quiet, private space.
Read our story on why we dumped the AI →No locked-in data
We don’t trap your data. Dump everything to universally readable CSV files whenever you want to move your thoughts elsewhere.
"The palest ink is better than the best memory."
— Chinese Proverb