Migrate from Slack

To import your current Slack data into Rocket.Chat:

  1. Go to https://[your_app].slack.com/services/export
  2. Click on Start Export
  3. Wait until your download is ready and download it (it will be a .zip file)
  4. Go to https://[your_rocketchat]/admin/import/prepare/slack
  5. Choose your downloaded .zip file and wait until Rocket.Chat can read it (it can take a few minutes, depending on the size of your Slack export)
  6. Deselect any items you don't want to import
  7. At the top of the page, click on Start Importing

Source: Slack import