Slack has removed 28 accounts that were linked to hate groups, the chat platform said in a Thursday blog post. “The use of Slack by hate groups runs counter to everything we believe in at Slack and is not welcome on our platform,” the company said. “Using Slack to encourage or incite hatred and violence against groups or individuals because of who they are is antithetical to our values and the very purpose of Slack.” Other tech companies, from Facebook to YouTube to Twitter, have grappled with hateful content on their platforms. Conspiracy theorists Alex Jones was kicked off a handful of social networks last year, and Facebook banned pages linked to far-right extremists the Proud Boys in October. Last month, conspiracy theorist Jacob Wohl was kicked off Twitter for setting up fake accounts, and Tommy Robinson, founder of the far-right English Defence League, was banned from Facebook and Instagram for breaking hate speech rules. Slack said in its blog post that it’ll investigate and “take appropriate action” when it learns about an organization using the platform for illegal or harmful reasons. The company will update its terms of service to make its stance on this issue clearer, it said. Slack didn’t immediately respond to a request for more information on the groups that were removed and how it found them.