Hold fn.
Write out loud.
Talk into any app on your Mac. Let go, and clean, punctuated text is already there — in Mail, Slack, Docs or your AI chat. Your voice never leaves your Mac.
Hold the key below and say anything.
It writes where you already write.
No new editor. Sayburst types into the field you're in — and picks the right style for the app.
You sayRunning about 10 minutes late. Uh, start without me.
Sayburst typesRunning about 10 minutes late. Start without me.
You saygroceries bullet point eggs bullet point oat milk bullet point coffee beans
Sayburst typesGroceries - Eggs - Oat milk - Coffee beans
You sayUm hi Sam, uh the draft is ready for review new paragraph. Can you look at it before Friday? Thanks, Alex.
Sayburst typesHi Sam, the draft is ready for review. Can you look at it before Friday? Thanks, Alex
Say it messy. Send it clean.
Real speech is full of “um”, false starts and words said twice. Sayburst strips them out, fixes capitals and punctuation, and understands “new paragraph” and “bullet point” — right on your Mac, in milliseconds.
Want it rewritten too? Plug in a model you trust — local with Ollama or LM Studio, or your own OpenAI or Anthropic key — and every mode can polish as it goes.
How writing modes work →So I think the launch is fine on thursday.
Clean removes “um” and “uh”, drops accidental repeats, and fixes capitals and punctuation — on your Mac, in milliseconds.
Your names, spelled right. Every time.
Teach it a word once. Turn a phrase you say into anything you want typed.
Vocabulary
Your words: SayburstGitHub
Please push the fix to GitHub and tag it in the Saberst repo.
Please push the fix to GitHub and tag it in the Sayburst repo.
“Saberst” is close to a word in your vocabulary and isn't a real word, so Sayburst corrects it. Real words are never changed.
Replacements
- “my email”
alex@example.com - “sayburst dot com”
sayburst.com
send the invoice to my email and link sayburst dot com in the footer
Send the invoice to alex@example.com and link sayburst.com in the footer.
Nothing you say gets lost.
- Switched windows mid-sentence? Sayburst won't type into the wrong app. It holds your words and offers Copy or Paste here.
- Password fields are never typed into.
- Your clipboard comes back after every paste — images and files too.
- Recordings hit the disk as you speak. If your Mac sleeps or crashes, your words are recovered on the next launch.
- ⌃⌥⌘V pastes your last dictation, anywhere.
You switched to Safari before the text was ready, so it wasn't typed there.
Your voice stays on your Mac.
Speech recognition runs on your Mac's Neural Engine. Download a model once and dictate on a plane, on the train, anywhere.
- Microphoneonly while you hold the key
- Speech modelParakeet or Whisper, on the Neural Engine or GPU
- Cleanupfillers, punctuation, vocabulary, replacements
- Your apptext pasted where your cursor is
Faster than you can lift your finger.
NVIDIA's Parakeet runs on the Neural Engine and turns a dictation into text in 82 milliseconds — before your hand is off the key. Whisper covers 99 languages when you need them.
See the benchmark →- Time to text
- 82 ms
- Faster than real time
- 96×
- Word error rate
- 0.46%
- Internet needed
- 0
Sayburst for iPhone
Coming soon to your pocket.
The same voice, your same words — on iPhone. Leave your email and we'll tell you the day it lands. One email, nothing else.
Try it for 7 days. Keep it forever.
$29 once for one Mac, $49 for three. Every 1.x update included. No subscription, ever.