AI tool privacy · Slack
Slack AI and your company’s data
By David Michaelson, MS Last checked October 23, 2026
The short answer
Slack says it never uses your messages and files to train large language models, and its AI only works with what each person can already see; Slack does use customer data for features like channel suggestions unless an owner opts out.
Safer setup: Choose which AI features members may use. If you don’t want your data helping train Slack’s global models, have an owner email Slack to opt out.
Plan by plan
Each answer comes from Slack’s own policy or help pages, with the link and the date we read it. Setting names are quoted exactly as Slack writes them.
| Question | Pro | Business+ and Enterprise+ |
|---|---|---|
| Trains on your data by default? | No, not for AI that writes text. Slack says it will not train generative AI on customer data without your opt-in. It does use customer data for other models, such as emoji and channel suggestions, unless an owner opts out by email. Read on October 23, 2026 Source: slack.com | No, not for large language models. Slack says your messages and files are never used to train any LLMs. As on Pro, owners can email Slack to keep data out of its other global models. Read on October 23, 2026 Source: slack.com |
| How long your data is kept | Not stored. Slack says conversation summaries disappear when you navigate away, and the data is not kept on devices or servers. Read on October 23, 2026 Source: slack.com | Summaries and search answers are not stored. Recaps are kept for 90 days. Channel summaries made by a workflow are kept under your organization’s data retention settings. Read on October 23, 2026 Source: slack.com |
| Who can see it | Only what each person can already see. Slack AI won’t use or show content from private channels or DMs a person isn’t in, and owners and admins decide which AI features members can use. Read on October 23, 2026 Source: slack.com | Only what each person can already see. Slack AI won’t use or show content from private channels or DMs a person isn’t in, and owners and admins decide which AI features members can use. On Enterprise plans, Org Owners and Admins can limit AI features to certain users and groups. Read on October 23, 2026 Source: slack.com |
| Where data is stored | In the United States. Slack says data is stored in the US unless you use data residency, which needs Business+ or Enterprise. Read on October 23, 2026 Source: slack.com | In the US by default. With data residency, the Primary Owner can choose a region for messages, files, and the search index. Some data, such as member profiles, may still be stored elsewhere. Read on October 23, 2026 Source: slack.com |
| How to delete | Conversation summaries are not stored, so there is nothing to delete afterward. Read on October 23, 2026 Source: slack.com | When messages used in a recap are deleted by any deletion or compliance policy, Slack deletes the stored recap too. Summaries and search answers are not stored. Read on October 23, 2026 Source: slack.com |
Safer setup, step by step
- Owners and admins can choose which AI features members use. On Enterprise plans, they can limit AI features to certain users and groups. Source: slack.com for this step
- To keep your data out of Slack’s global models, an Org or Workspace Owner or the Primary Owner emails feedback@slack.com with your workspace or org URL and the subject line “Slack Global model opt-out request.” Source: slack.com for this step
- Remember that recaps are kept for 90 days, and channel summaries made by a workflow are kept under your normal data retention settings. Source: slack.com for this step
What to write in your policy
Slack AI may be used only in our company Slack. Its answers can draw on anything a person can already see, so we keep channel access tight.
Building your own approved tools list? The SafeStart Handbook includes one, with company accounts and safer privacy settings.