Slack vs Messenger

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.

Owners and administrators may be able to access, modify, or restrict access to information, including profile details and workspace activity logs. In a workplace account, your employer may therefore have substantial visibility into your use of Slack.

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.

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 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 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.

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.

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.

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 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.

You give Meta a worldwide, transferable, sublicensable license to host, use, distribute, modify, and create derivatives from content you share. Even though the license ends when content is deleted, it is very broad while the content remains on the service.

Deleting content or an account may take up to 90 days, plus up to another 90 days for backup removal. Some content can also be retained longer for legal, safety, or technical reasons.

The privacy policy says Meta collects data you provide, your activity and connections, device and cookie data, and information from partners and third parties. This gives Meta a broad view of your use both on and off the service.

Consumer claims generally go to courts in your home country, but other disputes and claims Meta brings against you may be forced into California courts under California law. That can make non-consumer disputes harder to fight for users outside the U.S.

You can view, download, and in some cases port your information. That gives users some portability and a way to take their data elsewhere.

Meta uses your personal data to personalize ads and sponsored content across Meta Products. You can manage ad preferences, but ad personalization is the default funding model.

Meta shares information across Meta companies for safety, compliance, feature development, and usage analysis. That means your data can travel within the Meta ecosystem even if you only use Messenger.

Meta says it does not sell your personal data to advertisers and does not directly identify you to them unless you give permission. That is better than services that monetize by selling identifiable user data.

Meta provides settings and help-center paths to delete information or your account. This is a meaningful user control, even though the process is not immediate.

Meta says it may update the terms and will notify you at least 30 days in advance, and continued use means acceptance. That is better than silent changes, but still leaves amendment power with Meta.