Slack AI — privacy & data policy

Provider: Salesforce. PromptPrivacy score: 68/100. Last verified November 01, 2026.

What happens to your data?

Customer messages, files, and content are processed on behalf of your employer or workspace owner under the Customer Agreement. Slack uses account and usage metadata to maintain service performance, ensure security, and improve functionality. Data may be shared with approved subprocessors, affiliates, or law enforcement when legally required.

Does it train on your data?

Not specified. The policy does not mention whether customer data or user inputs are used to train AI models.

Can you opt out?

Not specified. The policy does not state whether AI model training occurs or whether an opt-out mechanism exists for it.

Data retention

Customer data is retained according to customer instructions, agreement terms, and configurable workspace settings. Other metadata and account information are retained as long as necessary to provide services, pursue legitimate business interests, or fulfill legal obligations.

Encryption & security

Slack states that it implements security measures taking into account data sensitivity and maintains internationally recognized security certifications, but specific encryption standards like TLS or encryption at rest are not detailed in this text.

Is it safe for work?

Yes. Slack provides robust enterprise management, workspace-level administrative controls, standard contractual agreements, and DPAs suitable for business environments.

Source policy: https://slack.com/trust/privacy/privacy-policy