Our goal at Slack is to create a product that simplifies work life and boosts productivity while prioritizing the privacy and security of Customer Data. We utilize Machine Learning and Artificial Intelligence to enhance our product, but take measures to ensure that Customer Data is not compromised. Customers have the option to opt out of their data being used to train global models. Some unique features include channel recommendations, search result optimization, autocomplete suggestions, and personalized emoji reactions based on message content. We prioritize privacy and confidentiality, ensuring that Customer Data is protected and never shared with third parties.
https://slack.com/trust/data-management/privacy-principles?nojsmode=1