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
You authorize once, in your browser
Halo opens Slack's own sign-in page. You approve exactly what Halo is allowed to do, nothing more.
- 02
The key goes straight to your Mac
The access key is handed to the Halo app and stored in the macOS Keychain, encrypted on your device. It never sits in a browser tab.
- 03
Your Mac talks to Slack directly
Every request goes from your Mac to Slack. Halo's servers never sit in the middle. They never see your messages or your content.
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.