For macOS

Your AI writing assistant, everywhere you type.

Halo lives in your menu bar. Select any text in any app, press a key, and rewrite, generate, or research it — then drop the result right back in place.

Press ⌥ Space anywhere — Messages, Mail, Notes, your browser, Slack.

Ask AI to edit or generate…
Improve writing
Fix spelling & grammar
Make shorter
Change tone ›
Humanize

What it does

One shortcut. Everything you write, better.

Halo works on the text you already have, or writes new text from a prompt.

Rewrite & refine

Improve, shorten, lengthen, fix grammar, or change tone — instantly, in any app.

⌨️

Generate from a prompt

"Draft a reply about Friday's deadline." Halo writes it and pastes it where you're typing.

🔎

Research while you write

Needs a fact or a stat? Halo searches the web and writes it in — with sources.

🗂️

Projects that remember

Save context about your company or clients once; Halo stays on-brand every time.

🪄

Humanize & format

Strip robotic, AI-sounding phrasing, or clean up messy structure into clear sections.

🔒

Private by design

Your projects live on your Mac. Nothing you write is stored on our servers.

How it works

Select. Press ⌥Space. Done.

No copy-pasting into another app. No switching windows.

Select your text

Highlight anything in any app — an email, a message, a doc.

Press the hotkey

Halo pops up right where you are with a menu and a prompt box.

Replace in place

Pick an action or type a request, then drop the result straight back in.

Pricing

Start free. Upgrade when you're hooked.

The everyday edits are free. Pro unlocks generation, research, and unlimited use.

Free
$0
  • Rewrite, fix grammar, shorten/lengthen
  • Change tone, humanize, format
  • A handful of edits every day
Join the waitlist
Halo Pro
$10 / month
  • Everything in Free, unlimited
  • Generate from any prompt
  • Web research with sources
  • Unlimited Projects & memory
Get Pro

Billed monthly · Cancel anytime · Secure checkout by Lemon Squeezy

Write better, everywhere — in one keystroke.

Join the waitlist