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Slack Privacy Summary

slack.com•Last updated: 04/09/2026
Productivity
High Exposure

Workplace collaboration and productivity platform for messaging, file sharing, voice/video clips and integrations across organisations and teams.

This summary was generated using AI and may contain errors or omissions. Learn about our methodology. Always refer to the original privacy policy for legal purposes.

Quick Summary

  • What They Collect: Workspace account details, messages/files, device and usage logs, billing, contact imports, audio/video metadata, and third-party data.
  • How They Use & Share It: Operate and secure services, improve features with predictive models, share with service providers, affiliates, and advertisers for off‑site targeting; no CCPA-defined sale.
  • Your Rights: Access, correct, delete, object to processing, opt out of marketing and cookie-identifier sharing, and work through your workspace owner for some controls.
Read the full privacy policy

Why You Should Care About Slack's Privacy Practices

  • Slack stores messages, files, audio/video metadata and contact imports which are highly sensitive and used across workplaces.
  • Employer and admin access can expose personal communications and activity to workplace monitoring and audits.
  • Predictive models and profiling can personalise outcomes and feed advertising without explicit training opt-outs.
  • International transfers, third-party integrations and retention after deactivation increase risk of exposure and legal complexity.

Why High Exposure?

  • Slack processes extensive categories including messages, files, audio/video metadata, billing and contact imports, indicating broad data collection.
  • Slack shares identifiers and internet activity with third-party advertisers and uses analytics partners for targeting ads off-Slack.
  • Other Information may be retained after account deactivation for legitimate business interests, audits, disputes and legal compliance.
  • Automated profiling, device fingerprinting, employer access and international transfers create multiple points of privacy risk and exposure.
Learn more about our methodology →

Privacy Highlights

What They Collect

  • Account information
  • Profile information
  • User content and files (Customer Data)
  • Payment information (credit card, banking, billing address)
  • Professional or employment-related information

How They Share Data

  • Service providers (hosting, payments, customer support)
  • Analytics and measurement partners
  • Advertising partners (third-party advertisers)
  • Third-party app/integration developers (Third-Party Services)

Data Retention

Customer Data retained according to Customer instructions and Customer Agreement; Other Information retained as long as necessary for service, legal, audit, dispute resolution, and legitimate business interests.

Your Rights

  • Access data
  • Rectify data
  • Erase or limit processing
  • Object to processing (including direct marketing)

Detailed Analysis

Concerning Practices

  • Extensive processing of messages and files (Customer Data handled by administrators and Customers)
  • Behavioral profiling and predictive models used to make feature suggestions and insights
  • Sharing identifiers/internet activity with third-party advertisers to target ads off-Slack
  • Automated processing (including device fingerprinting) for abuse prevention and feature tuning
  • International transfers using SCCs and other cross-border mechanisms
  • Employer / Workspace-owner access to employees' profile and activity data
  • Retention of Other Information after account deactivation for business, legal, or audit purposes
  • Acquisition or transfer of Information during mergers, sales or reorganisations

Personal Data Types

Account informationProfile informationUser content and files (Customer Data)Payment information (credit card, banking, billing address)Professional or employment-related informationContact sync data (imported address book / calendar)Audio and video metadataSupport data and feedbackThird-party / linked account data

Tracking Methods

Cookies and similar technologiesCookie identifiersDevice fingerprinting

Third Parties

Service providers (hosting, payments, customer support)Analytics and measurement partnersAdvertising partners (third-party advertisers)Third-party app/integration developers (Third-Party Services)Corporate affiliates and subsidiariesProfessional advisers (lawyers, auditors, insurers)Government authorities and law enforcementAcquirers or successors in sale or merger scenarios

User Controls

Access dataRectify dataErase or limit processingObject to processing (including direct marketing)Withdraw consent where applicableOpt-out of marketingOpt-out of sharing activity based on cookie identifiers (Global Privacy Control)Delete or deactivate accountContact Customer (workspace owner) to exercise workspace-level controls

Frequently Asked Questions About Slack

Legal Disclaimer

This analysis is provided for informational purposes only and should not be used as legal advice. Privacy Exposure ratings and summaries are AI-generated assessments based on publicly available privacy policies — they are not statements of fact and may contain errors. Learn how ratings are determined. Consult with legal professionals for matters requiring legal guidance.