Retell AI outage, 5 September 2026
Web Calls and Phone Calls Disruption
- Started
- Resolved
- 6 Sept 2026, 00:19 UTC (after 1 h 8 min)
- Impact
- Major
- Affected
- Web Call, Phone Call
Last update from Retell AI
### Summary On September 5, a rare race condition in our custom LLM call path caused call scheduling queues across our fleet to stall. Because the failure also made containers appear underutilized, autoscaling never triggered. Between roughly 10:00 and 16:00 PST the impact grew until most containers were stuck and new calls could not be placed. ### Impact * **Web calls, outbound calls, and inbound calls** were all affected. * Inbound calls were the least affected, since they hold the highest priority in our scheduling queue. * Peak impact occurred around 16:00 PST. ### Root Cause The failure required a specific sequence of events: 1. **Stalled initialization.** If a call ended before i...
Read the full incident on the official Retell AI status page
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