Slack provides meaningful privacy disclosures and several data-subject rights, but user control is limited in managed workspaces and data sharing/retention are broad. The posture is typical for business collaboration software, not especially user-friendly for individual privacy.
Slack’s legal terms are fairly standard for an enterprise messaging platform, but they are strongly workplace-controlled: employers or workspace owners govern most workspace data, settings, and many user rights. Slack collects substantial account, usage, device, cookie, location, and integration data, may share data with admins, service providers, affiliates, connected workspaces, and law enforcement, and transfers data internationally. The policy offers several user rights and California privacy options, but deletion and access for workspace content often require going through the customer controlling the workspace.
Points of interest
Slack collects account details, logs, device information, approximate location, cookies, imported contacts, third-party integration data, and audio/video metadata. That gives Slack a fairly detailed picture of how you and your device use the service.
"Slack also collects, generates and/or receives the following categories of Other Information: Workspace and account information ... Log data ... Device information ... Location information ... Cookie information"
If a workspace enables third-party services, Slack may receive and share information with those providers, and those services run under their own policies. Users should assume integrated apps can expand where their data goes.
"When Third-Party Services are enabled by a Customer or an Authorized User, Slack may share Information with Third-Party Services."
Slack keeps non-customer personal data as long as necessary for support, legal compliance, disputes, and business purposes, including after account deactivation. That means some data can persist well after you stop using the service.
"Slack may retain Other Information pertaining to you for as long as necessary for the purposes described in this Privacy Policy"
Slack transfers personal data outside your country, including to the United States and other countries. While it cites safeguards like Standard Contractual Clauses, cross-border transfers still increase jurisdictional exposure.
"Slack may transfer your Personal Data to countries other than the one in which you live, including transfers to the United States."
Slack says users may request access, correction, and deletion of personal information, and can use account settings tools where available. For workspace-controlled data, though, you may need to contact the customer/administrator.
"you may have the right to request access to your personal information, as well as to seek to update, delete, or correct this information."
California users get CCPA/CPRA rights, including deletion, disclosure, and opting out of certain ad-related sharing. Slack also recognizes Global Privacy Control for cookie-based sharing signals.
"California consumers may make a request ... to delete their personal information, to opt out of any “sales”, to know and opt out of sharing ..."
Slack uses personal data to send marketing emails and other promotional communications. You can control some of these messages, but marketing is still an express use of the service data.
"We sometimes send emails about new product features, promotional communications or other news about Slack."
If you use Slack through an employer or other customer, that organization controls workspace settings and Customer Data. Practically, this means your message and file access rights may depend more on your workspace admin than on Slack itself.
"The organization ... that entered into the Customer Agreement ... controls its instance of the Services (its “Workspace”) and any associated Customer Data."
The terms expressly say the Slack Terms are a binding agreement. This is standard, but it means use of the service is legally governed by incorporated agreements you should read carefully.
"Please read the Slack Terms carefully because they are a binding agreement between you and us."
Other Messaging services on AIgree
Compare Slack with…
The 7 clauses that actually matter, the red flags to watch for, in 5 minutes.
Report a problem with this summary
Spot something wrong, missing, or misleading? Tell us — we review every report.
Spot something wrong, missing, or misleading? Tell us — we review every report.
Thanks — your report was submitted and will be reviewed.
Documents
Terms of Service
source ↗- •The Slack Main Services Agreement and Supplemental Terms form the “Slack Terms” governing your use of Slack’s online workplace tools.
- •If you are a “Customer,” the Slack Terms govern your access and use of the Services.
- •If you use Slack through a workspace set up by a Customer, the “User Terms of Service” govern your access and use.
- •The document states it is a binding agreement between you and Slack, and directs you to read the full referenced agreements.
Privacy Policy
source ↗- •Slack says your employer or workspace owner controls messages, files, and workspace settings, while Slack controls account, usage, device, cookie, and related service data.
- •Slack collects account details, billing information, logs, device and approximate location data, cookies, imported contacts, third-party integration data, and audio or video metadata.
- •Slack uses data to provide and improve services, secure accounts, prevent abuse, manage billing, send required service notices, comply with legal requests, and send marketing.
- •Your information may be shared with your workspace admins, connected workspaces, service providers, affiliates, event sponsors, enabled third-party apps, advisors, and law enforcement when legally required.
- •If you enable third-party integrations, Slack may receive and share data with those providers, which have their own privacy policies and practices.
- •Customer Data retention follows your organization's instructions and settings, while Slack keeps other personal data as needed for support, legal compliance, disputes, and business purposes.
- •Slack transfers personal data internationally, including to the United States, and says it uses Standard Contractual Clauses and APEC certification-related safeguards.
- •You may have rights to access, correct, delete, restrict, or object to some processing, but for workspace data you usually must contact your employer or workspace owner.
- •California users can request disclosure or deletion, opt out of certain ad-related sharing, use Global Privacy Control for cookie-based sharing, and appoint an authorized agent.
- •Slack does not allow users under 16 where prohibited by law, may change this policy with notice for material changes, and cannot guarantee absolute security.
