The best place on your
Mac to think in text.
An editor that feels lovely under the fingers. Spaces that keep the day job away from the novel. Notes that point at each other. And an AI that sits quietly until you jab it with a cursor. Your notes stay ordinary files on your Mac, which is the least dramatic and most reassuring thing about it.
Typing in it is the reason you will stay.
We fixed roughly a hundred tiny annoyances you had stopped noticing in every other notes app. You will not be able to name them. You will just find yourself typing more.
Work does not belong in the same drawer as dinner.
Each space is its own folder, its own note list, its own search, and its own tint, so the whole app quietly changes colour when you switch. Client work here, the side project there, the reading pile somewhere else entirely. One click and the other three stop existing for a while.
Drag a note into a different space and every link pointing at it still lands. Margin keeps track. You are free to reorganise at 11pm with no consequences.
Notes that point at each other.
Start typing a note's name and link straight to it. Rename that note later and every mention of it quietly updates, because chasing broken links is nobody's idea of a good evening.
You can also grab a link to a note and drop it in a calendar invite or a ticket. Click it, Margin opens, right note, right place. And ⇧⌘O does the same trick for everything else: every command and every note in one list, without touching the mouse.
Your prompts, your model, your machine.
Write your own actions once and they live in the menu forever: "make this a tweet", "turn this into a changelog entry", "answer this in my voice". Each one decides where its result goes, including straight onto the clipboard. Every change arrives as a diff you say yes to first.
Then pick who does the work. A frontier model on your own API key, the CLI agent already installed on your Mac, or a model running entirely on the machine. The actions are the same either way.
Built to developer standards. Not for developers only.
We built the notes app we wanted for ourselves, which meant being fussy about the things developers get fussy about: it starts instantly, it never blocks on a spinner, your notes are ordinary files, and nothing is hidden behind a service.
None of that asks anything of you. Open it, type, close it. It behaves exactly like a notes app should. The deeper end is there when you want it: keep a space inside a repo, drive it from Shortcuts or Raycast, wire it to a hotkey. Ignore all of it and nothing is missing.
More is coming for the tinkerers, because we are the tinkerers. Everyone else gets the same app, quietly getting faster.
Not open yet. Nearly.
Margin is being built slowly and on purpose. Leave an address and you will hear from us exactly once, on the day it opens, and then never again unless you ask.
Margin
Made on a Mac, for a Mac, mostly on weekends.