Ah, but Slack doesn't delete the history either unless you pay them: https://slack.com/help/articles/203457187-Customize-message-and-file-retention-policies htt

Ah, but Slack doesn't delete the history either unless you pay them: https://slack.com/help/articles/203457187-Customize-message-and-file-retention-policies https://slack.com/help/articles/203457187-Customize-message-... On the free tier it's still there, on their servers.