Your assistant, inside Slack.

Relay is a Slack app that connects your workspace's own AI assistant to Slack, so the assistant can read the channels you invite Relay to and reply there. Relay runs no AI model itself.

Add to Slack

Free during pilot.

The problem it solves

Your AI assistant runs outside Slack, so it does not know when someone in Slack needs it, and it cannot read or reply there on its own. Relay tells your assistant when it is needed, lets it read those messages, and lets it reply in the same conversation.

How it works in Slack

  • Mention: type @Relay in a channel Relay is in. Relay sends your assistant a short notice with IDs only, never the message text. Your assistant then reads the message through Relay and replies in the thread.
  • Direct message: send Relay a direct message. A direct message to Relay wakes your assistant, and it replies in the same conversation. Asking Relay for help is the one exception (see below).
  • Wake words: optional words that wake your assistant when someone uses them in a channel Relay is in. They are off by default.
  • Daily digest: once a day, your assistant gets a notice with counts of the messages that did not wake it, and can read short previews of up to 8 of them.
  • Home tab: each person sees whether an assistant is connected, the channels they share with Relay, how long messages are kept, and help links. Workspace admins, owners and the installer also see a link to the Relay settings page.
  • Help replies: send Relay a direct message that says help to see what it does. Relay also tells you, in fixed text, when no assistant is connected, when it could not reach your assistant, or when your assistant has not answered yet.
  • Reminders: your assistant can set, list and cancel reminders, which Slack posts as scheduled messages in the same conversation.
Screenshot to come: a mention of @Relay in a channel and the assistant's reply in the thread
Screenshot to come: a direct message to Relay, and the help reply
Screenshot to come: the Relay Home tab

Bring your own AI

Relay does not include an AI assistant. Your workspace connects one it already uses, and chooses and pays for it separately. Assistants that work: any AI assistant that supports MCP (the Model Context Protocol), for example Grok Bot, Claude or Cursor.

The assistant reads and replies through Relay's MCP tools, using a token that only works for your workspace. If it can receive a web notice (a webhook), Relay wakes it right away. If not, it sees new messages the next time it checks.

What happens after install

  1. Slack shows the permissions Relay asks for. Click Allow.
  2. You land on a page with next steps, and Relay sends the person who installed it a short welcome message in Slack.
  3. Connect your assistant: open your Relay settings page and follow the steps there.
  4. Open the Home tab: in Slack, find Relay under Apps and click Home.
  5. Invite Relay to each channel you want your assistant to see: open the channel and type /invite @Relay. Relay never joins a channel by itself.
Screenshot to come: the page shown after install, with next steps

AI can be wrong

Answers come from the AI assistant your workspace connected, not from Relay itself. AI can be wrong, so check anything important. Replies, summaries and reminders written by your assistant can be inaccurate, incomplete or out of date. More in AI and data.

Your data

Relay keeps messages for 1, 3 or 7 days (7 by default), encrypted with a key for your workspace only, and never uses Slack data to train an AI model. When Relay is removed from Slack, stored messages are deleted right away and everything else within 14 days. Read the privacy policy.

Pricing

Free during pilot. After Relay is listed on the Slack Marketplace, the price is $7.25 per workspace per month. Your AI assistant's own subscription is separate. See the terms.

Relay | Connect your own AI assistant to Slack