If both person who direct message each other do not rat, do the company they work at (who pay slack) can access direct message?
Do Slack rat their user to their client ?
If both person who direct message each other do not rat, do the company they work at (who pay slack) can access direct message?
Do Slack rat their user to their client ?
Assuming you actually mean “Can the client review messages sent on the platform they pay for, so their employees can use it”, yes, they can. Same for MS Teams.
Why do you think that is “ratting”?
If you are concerned about what you are messaging a colleague, it probably shouldn’t be messaged on your employer’s chat platform.
Nothing you do at work, on their network and software, is private