Slack outage on November 19, 2025
Slack users likely saw failed connections, degraded availability, or session instability for this Productivity service. The incident reached Major severity and lasted 45 min. The stored report window does not show a preserved user-report spike.
Between 10:10 AM PST and 10:25 AM PST on November 10, 2025, some users may have temporarily been unable to connect to Slack or experienced a degree of latency when attempting to use features such as huddles, workflows, or message delivery.We traced this back to a spike in traffic to core backend Slack functions. This traffic temporarily overwhelmed a subset of backend components, leading to brief increase in connection failures. The traffic spike subsided and connectivity was restored for all users by around 10:25 AM PST. To mitigate the risk of reoccurrence, we adjusted backend traffic routin
Deterministic readout · awaiting AI summary pass
Incident detected
Major confidence crossed the incident threshold for Outage: Trouble connecting to or loading Slack.
Marked resolved
The incident was closed after 45 min of observed impact.
No per-source signal payloads were preserved in this incident's snapshot window.
Confidence scoring
80.00The incident reached 80.00 peak confidence across available stored status snapshots.
User reports
0 / 15mNo elevated user-report volume was preserved in the incident window snapshots.
Status samples
0 affectedThe incident row exists, but the bounded snapshot window does not include affected status samples.
Recovery signal
ResolvedRecovery was recorded at Wed, Nov 19, 2025, 04:29 PM UTC.