Slack Broadcasts

Plain Broadcasts is a free, standalone app built by the Plain team to help you send high-quality updates to specific customer groups directly in Slack.

Whether you are announcing a new feature, sharing a changelog, or coordinating around an incident, Broadcasts makes it easy to deliver clear, branded messages right where your customers already are, without needing engineering help or a dedicated marketing platform.

Getting started

1. Define an Audience

Audiences let you control who receives your messages.

• Group your customer Slack channels into named audiences (e.g. Enterprise Customers, Beta Users, EU Accounts)

• You can only add channels where the Plain app is installed

• If a channel is missing, hit the refresh icon next to the search box to update the list

2. Create a Broadcast

A Broadcast is the message you want to send. Compose it using familiar content blocks:

• Text

• Headings

• Lists

• Images

• Code blocks

• Emojis (use your system emoji picker, for example Ctrl + Cmd + Space on Mac or Windows key + semicolon on Windows)

Once sent, the Broadcast appears as a well-formatted message in each selected Slack channel.

3. Send or schedule your Broadcast

Review your audience and message before sending. Broadcasts are delivered directly into each channel as a new top-level message from the Plain bot.