Who owns Slack messages?
The short answer
Slack says customers own their data, so the company holds the workspace. Four parties can still have a claim: the company, the employee who wrote it, another organization for shared channels, and people mentioned. Slack's text doesn't say who owns shared-channel content.
Ownership comes in layers. Each layer has a different source, and none of them settles whether you may license the messages.
Who owns the messages, the company or Slack?
Slack's privacy principles, which carry no date, say customers own their own Customer Data. They also say Slack will not use Customer Data to train generative AI models unless the customer gives affirmative opt-in consent.
Slack's privacy policy adds that the organization that created the workspace controls its Customer Data and Slack acts as a processor following its instructions.
The same policy says Slack is the controller of usage and device information it collects about people. See does Slack sell your data.
Who owns them, the employer or the employee?
The copyright statute has a default rule. Under 17 U.S.C. 201(b), for a work made for hire the employer is considered the author and owns the rights, unless the parties agreed otherwise in a written instrument they signed.
Section 101 defines a work made for hire as a work prepared by an employee within the scope of employment, or a specially commissioned work in one of nine listed categories with a signed writing.
The statute text does not say whether a short chat message is a copyrightable work, and I found no court decision on workplace chat. Employment agreements and handbooks may also say something, and a lawyer reads those.
What about messages from another organization?
A shared-channel export carries the other organization's messages. Slack's help page says your retention settings apply only to messages and files sent by your own members. It does not say who owns shared-channel content.
Partners and customers may also hold contract claims over what they posted. Our Slack Connect page covers that case.
Do the people in the messages have a say?
Ownership of a message and rights over the personal details in it are separate questions. A person named in a thread can have privacy rights whoever holds the copyright.
Licensing employee emails covers what your staff may object to and where that dispute has surfaced. Licensing Slack in a shutdown covers the duties that stay in place after a company closes.
Does owning Slack messages let you license them?
Ownership and the right to license differ. The limits sit in NDAs, customer contracts, privacy law and shared channels. See is it legal to license company Slack data and our rights check.
Talk to a privacy or commercial lawyer in your state before you sign. We gather facts and give no legal advice.
Vaultfish helps you run the process. We are not lawyers and this is not legal advice. If you need counsel who knows this area, we can point you to one. Ask for a referral
