Slack data falls into two primary buckets: direct messages and Slack channels. Channels usually are classified as public or private and business-related or social and entertainment-focused. Generally, we recommend that organizations purge direct messages—which are unlikely to provide any value to the business—on a relatively rapid cycle, perhaps every 90 to 180 days. Similarly, organizations can use the same short retention period for data in social and entertainment channels. On the other hand, data in project-related channels is likely to be a valuable source of institutional knowledge for the organization and may be subject to regulatory retention requirements. For more at Data Retention Policy Left to its own devices, Slack will retain all messages and files—including attachments—for as long as your workspace exists. Users of the free version of Slack can only access their most recent 10,000 messages, but all other users can retain everything fore...