Slack investigates service issues affecting users in Europe

In the early hours of Monday, June 9, 2025, users in Europe began reporting significant issues with Slack, a widely used corporate communications app. Reports from DownDetector indicated a sharp increase in service problems as employees logged on to work after the weekend. Slack acknowledged these issues on its Status page, stating that some users were experiencing difficulties in loading content, particularly threads and the Activity view. The company pledged to provide updates every 30 minutes until the situation was resolved. Initial reports suggested that the problems may not be affecting all users equally, indicating a regional or localized issue. This morning's disruptions are the second major outage for Slack in recent months. Previously, on May 12, the app experienced problems that limited users' ability to send messages and access threads, lasting more than an hour. The root cause of that earlier outage was identified as a communication problem between the web application and the database routing layer, resulting from exceeding the defined configurations due to recent infrastructure growth. Although the current issues do not appear to be directly connected to the previous outage, they highlight ongoing vulnerabilities within Slack's operational framework. The company’s response focused on urgency and transparency, as they prioritized resolving the issues affecting a significant portion of their user base. Slack is working diligently to restore normal operations, ensuring it keeps users updated with brief and regular communications throughout the troubleshooting process. The problems today caused disruptions in corporate communications for numerous organizations that rely on Slack for their day-to-day operations. The impact is particularly notable as it coincides with the beginning of the work week, when many employees are returning after the weekend and looking to connect with their teams. While some users reported normal functionality during brief tests, the continued service problems raise questions about the platform's reliability and the need for Slack to strengthen its infrastructure to accommodate its growing user demand.