Slack is a popular workplace communication platform used by millions of people for messaging and collaboration. Outages can significantly disrupt workflows and productivity for businesses relying on the service. A service outage refers to when a service is unavailable or not functioning correctly. - Thousands of Slack users reported issues accessing the platform on Wednesday, February 26, 2025. - The outage began around 9:30 a.m. EST, impacting users' ability to log in and send messages. - Slack acknowledged the issue and stated that an investigation was ongoing to determine the cause and restore service. - The outage affected users across the United States, including major cities like Chicago. - Downdetector, an outage tracking website, also reported a surge in user reports regarding problems with Slack.