Slack outage chaos gripped workplaces worldwide Wednesday morning as users reported widespread failures in messaging, API connectivity, and thread loading. The San Francisco-based platform confirmed technical issues affecting core functions, with over 3,000 incident reports flooding Downdetector at its peak.
Slack’s engineering team identified problems across multiple service disruption points, stating:
We’re investigating API endpoint failures impacting message delivery and thread functionality.Critical affected features included:
- Group and direct messaging systems
- Emoticon reaction updates
- Cross-platform API integrations
Enterprise users faced operational paralysis, particularly teams coordinating time-sensitive projects. This outage cost us hours of productivity,tweeted a project manager at a Fortune 500 company. While partial restoration occurred by mid-morning PST, lingering instability affected file sharing and Slack Connect channels.
This marks Slack’s third major service disruption in 2024, raising concerns about platform reliability as businesses increasingly depend on real-time collaboration tools. Analysts suggest companies should develop contingency plans for mission-critical communications, including backup platforms and offline protocols.