A writing aid that never leaves your Mac
The right word, whispered from the wings
Souffleuse slips the right word in under your cursor, in any app on your Mac, the moment you're searching for it. Then it disappears. Everything stays on your machine.
Souffleuse Studio: one-time purchase from €29. For Apple Silicon Macs.
~6.5 MB · notarized by Apple · your text never leaves your Mac.
Context: Mail, replying to a quote
Example: you write "I'll get back to you," and Souffleuse suggests the rest in grey, "before the end of the week." Tab accepts it, Esc clears it.
Hover or pick a scene: it plays once, then falls silent.Tap a scene: it plays once, then falls silent.
Like a theatre prompter
The souffleuse — the prompter — is a theatre craft we let quietly fade away. A person crouched at the edge of the stage, who whispers the line to the actor right when they stumble, just loud enough for them, never for the house. She never comes up to take a bow. The applause goes to the actor, and that's exactly as it should be. We wrote this software in the same spirit: there when you hesitate, invisible the rest of the time. What you write isn't hers: it stays yours.
Whisper the word, never steal it.
It only appears when you hesitate
Souffleuse doesn't blanket your screen in grey text. It follows the rhythm of your typing and only offers a suggestion the moment you slow down — the way a real prompter waits for the actor to stumble before slipping them the line.
While they speed up
she stays quiet. She speaks only to the silence, and it's there, in the hollow of the hesitation, that she places the right word.
What she does
Nine uses, one tool
i. — on stage
The suggestion under your cursor
A grey suggestion, right where you write.
In Mail, Notes, Messages, your web browser — almost anywhere you write on your Mac — the suggestion appears in grey, just under your cursor, without disturbing anything around it.
ii. — on stage
Tab to take, Esc to leave
You stay in control, always.
Tab accepts the rest, word by word — or in chunks, if you'd rather take it piece by piece; Esc clears it without a trace.
iii. — on stage
Everything happens on your Mac
No server, no round trip.
Souffleuse thinks right on your Mac, never going through the internet. After a one-time setup, it works even offline. What you write goes nowhere, for the simple reason that there's nowhere to send it.
iv. — on stage
It learns your style
The more you use it, the more it sounds like you.
Over time, it remembers the turns of phrase you keep and tunes itself to the way you write. What it learns stays locked on your Mac, readable by you alone.
v. — on stage
Rephrase in the right tone
Your sentence, reread for the room.
The same words don't land the same way in Mail and in Messages. Type //: it rereads your sentence and rephrases it in the tone of the room (measured for a client, light for a friend), or tightens it when it runs long. Still your words, better placed.
vi. — on stage
Translate as you write
Each conversation's language, remembered.
One conversation in French, another in Spanish? Pick a conversation's language once: it then translates as the exchange unfolds, in a small, quiet panel, without anything going anywhere. A // also calls it up, on demand.
vii. — on stage
Typos fixed automatically
The slip of the finger, mended in passing.
A word typed too fast, two letters swapped? It recognises the slip, whispers the continuation with the right word, and Tab mends it all in passing, without pointing it out.
viii. — on stage
The right emoji, instantly
The right emoji, hands on the keyboard.
Type a colon: the picker opens right where you write, your favourites first. One key, 1 to 5, and the emoji lands. It keeps up whether you write in English, in French, or both in the same sentence.
ix. — on stage
The time you save
Keystrokes spared, time saved.
At the end of the day, a small ledger tells you, and you alone, what it spared you: so many keystrokes, so many minutes. It never leaves your Mac either.
What you write never leaves
Private by design.
Souffleuse only works because it reads what you write. So we made sure it has no way to repeat it: no account, no cloud, no "we anonymise it." There simply is no way out.
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Local from end to end
Everything happens on your Mac. Your text passes through no server, ever.
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Nothing leaves, ever
Just once, at install, Souffleuse connects to set itself up. After that, nothing leaves your Mac.
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Kept under lock and key
What it learns of your style is locked on your Mac. You alone can read it.
In three steps
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Step 1
1Install
Drag Souffleuse into your Applications, grant it the permission it asks for, and it settles quietly into the menu bar at the top of your screen.
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Step 2
2Write
Type as you normally would, in whatever app you like. When you hesitate, a grey suggestion appears under the cursor.
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Step 3
3Confirm
Like it? Tab. In your way? Esc, or just keep typing: it disappears.
A few questions
Which Macs are supported?
Souffleuse runs on Macs with a recent Apple chip (the M1, M2, M3 models and later) on macOS Sonoma (version 14) or newer. Older Intel Macs are unfortunately not supported. If in doubt, the Apple menu (top-left of the screen) > "About This Mac" tells you your model at a glance.
What leaves my Mac?
Day to day, nothing at all. The only time Souffleuse connects is at install, to set itself up. After that, your text and everything it learns about you stay on your Mac, and it works even without an internet connection.
How much does it cost?
Souffleuse Studio is a one-time purchase: from €29 with Lightning, or €39 by card. No subscription, no daily quota: you buy a license, activate it on your Mac, and write.
How is it different from a regular spellchecker?
A spellchecker waits until you're done to underline what's wrong. Souffleuse does the opposite: it offers the next words before you write them, in your own tone, and learns from what you keep. It doesn't correct after the fact, it whispers while you write.
Which apps does it work in?
Anywhere macOS lets it read the text field: Mail, Notes, Messages, Safari and most browsers, and the vast majority of Mac apps. The few apps that keep their door closed? It simply stays silent there. And you can ask it to stay silent yourself, app by app, in its settings.
What about my passwords?
It never sees them. Secure fields (passwords, codes, card numbers) are marked as such by macOS, and Souffleuse looks away: no reading, no suggestion, no trace.
Does it slow my Mac down?
It's built for Apple chips: while you write, it answers in a fraction of a second; the moment you rest your hands, it goes to sleep and frees the memory. A presence in the wings, not a second lead taking over the stage.
How does translation work?
You pick a conversation's language once; it remembers, and translates as the exchange unfolds, in a small, quiet panel. Like everything else, translation happens on your Mac: your messages don't go off to be translated somewhere else.
How do I uninstall it?
Like any Mac app: drag it from Applications to the Trash. What it had learned of your style lives in a single, encrypted folder on your Mac; delete that too and nothing remains. There is no copy anywhere else, by construction.
The right word, whispered from the wings.
Download for MacSouffleuse Studio: one-time purchase from €29. macOS Sonoma (14) or newer · Apple Silicon.
~6.5 MB · notarized by Apple · your text never leaves your Mac.
Already on Macs during the beta.
Pass the hat
Souffleuse is funded by Studio licenses. If she whispers the right words, drop a coin in the hat — in Bitcoin, over the Lightning Network. Any amount, no account, straight to the author's node.
Lightning address
— or scan —
Bitcoin · Lightning · 100 % non-custodial. No card, no middleman.