Slack AI — privacy & data policy

Provider: Salesforce. PromptPrivacy score: 66/100. Last verified July 26, 2026.

What happens to your data?

Slack processes your data primarily to provide their productivity services and to fulfill legal obligations. Your employer (the Customer) acts as the controller of your workspace data, meaning they decide how your messages and files are managed, retained, or shared.

Does it train on your data?

Not specified

Can you opt out?

Yes, for certain activities like marketing emails or sharing for targeted advertising. For other processing based on legitimate interests, you can object by contacting Slack.

Data retention

Customer Data is retained in accordance with Customer instructions and applicable law. Other Information is retained as long as necessary for the purposes described, such as providing services, audits, and legal compliance.

Encryption & security

Slack states they work to protect information using current technology and have received internationally recognized security certifications. They mention standard encryption practices but do not explicitly detail the specific algorithms or at-rest vs. in-transit protocols in this text.

Is it safe for work?

Yes, the service is designed for enterprise use with robust administrative controls, data processing agreements, and compliance certifications.

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