Does Slack AI train on your data by default?

Pro: not used for AI that writes text. Business+ and Enterprise+: not used for AI that writes text.

Is Slack AI safe for business data?

Q: Which Slack AI plan should a small business approve?

Your company Slack plan. 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.

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.

Last checked October 23, 2026 · First published October 23, 2026 · 0 changes

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. Source: https://slack.com/trust/data-management/privacy-principles (checked October 23, 2026). Via https://aitoolprivacy.com/ai-privacy/slack-ai/

Slack AI, “Slack will not use Customer Data to train generative AI models unless Customer provides affirmative opt-in consent.” https://slack.com/trust/data-management/privacy-principles, read on October 23, 2026. Compiled by AI Tool Privacy, https://aitoolprivacy.com/ai-privacy/slack-ai/

How to keep Slack AI safe for a small team.
1. Owners and admins can choose which AI features members use. On Enterprise plans, they can limit AI features to certain users and groups. (https://slack.com/help/articles/28310650165907-Security-for-AI-features-in-Slack)
2. 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.” (https://slack.com/trust/data-management/privacy-principles)
3. Remember that recaps are kept for 90 days, and channel summaries made by a workflow are kept under your normal data retention settings. (https://slack.com/help/articles/28310650165907-Security-for-AI-features-in-Slack)
Plan to approve: Your company Slack plan
Setting to check: Which AI features members can use; global model opt-out (by email)
AI policy line: 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.
Checked October 23, 2026, from https://aitoolprivacy.com/ai-privacy/slack-ai/

Training, plan by plan

Not used for training: Pro: not used for AI that writes text.
Not used for training: Business+ and Enterprise+: not used for AI that writes text.

What it does with your data

Slack AI, plan by plan. Every answer links to the vendor’s own page.
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 Suggest an edit	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 Suggest an edit
How long chats are 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 Suggest an edit	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 Suggest an edit
Who can read them	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 Suggest an edit	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 Suggest an edit
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 Suggest an edit	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 Suggest an edit
How to delete	Conversation summaries are not stored, so there is nothing to delete afterward. Read on October 23, 2026 · source: slack.com Suggest an edit	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 Suggest an edit

How to turn training off

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
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
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

Safer setup for a small team

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 to approve: Your company Slack plan
Setting to check: Which AI features members can use; global model opt-out (by email)

A line for your AI 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.

Want this in your team’s AI policy? The SafeStart kit, a plain-English AI policy and training for small teams, is coming soon.

Questions about your own setup? Write to hello@terrapilgrim.org.

What changed

No changes recorded since we first published this page on October 23, 2026. Every change goes in the change log.

Sources (4)

slack.com/trust/data-management/privacy-principles · read on October 23, 2026
“Slack will not use Customer Data to train generative AI models unless Customer provides affirmative opt-in consent.”
slack.com/help/articles/28310650165907-Security-for-AI-features-in… · read on October 23, 2026
“that data is not stored on devices or servers”
slack.com/help/articles/360035633934-Data-residency-for-Slack · read on October 23, 2026
“If you're not using data residency, your data will be stored in the US.”
slack.com/trust/ai-principles · read on October 23, 2026
“Your Customer Data (like messages and files) is never used to train any LLMs.”

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