Slack
Premium OAuth CommunicationReply drafting that actually knows the thread.
Halo reads the Slack conversation on your screen the way a screen reader would (on your Mac, through macOS accessibility), so its suggestions and autocomplete know who said what, in order, without the sidebar noise. That reading never touches a server.
Connect your account and Halo can also act: send a message or a DM for you, with a confirmation before anything goes out, and resolve names against your workspace so "message Sam about the deck" reaches the right Sam.
Premium
A paid capability, part of a Halo plan. The free Mac app stays fully featured on its own.
Capabilities
What Halo does with it
Free, on your Mac
- Reads the conversation you're looking at (on your Mac, via macOS accessibility), so suggestions and autocomplete follow the thread
- Drafts replies in your voice, right where you're typing
With a Halo plan
- Sends messages and DMs for you, always with a confirmation first
- Knows the people in your workspace, so names resolve to real teammates
- Surfaces unread messages that look worth your attention
How it connects
You authorize. Your Mac holds the key.
- 01
Set up Halo's own line
A quick one-time setup gives Halo a dedicated Apple ID, a private line that is just for talking to it. You make it once, the way you would any Apple ID.
- 02
Text it from your iPhone
Message that line from your iPhone like you would text a friend. Your Mac, signed in to the same line, receives it.
- 03
Your Mac answers
Halo reads the text on your Mac, thinks on your Mac, and texts you back. The whole exchange rides Apple's end-to-end-encrypted iMessage.
What stays private
Your Slack key is stored in the macOS Keychain. Reading the conversation happens entirely on your Mac, and when Halo sends a message it talks to Slack directly from your machine. Halo's servers never see your messages.