Outage in AssemblyAI

Some Streaming Sessions are Failing to be Established

Resolved Minor
September 29, 2025 - Started 8 days ago - Lasted about 12 hours
Official incident page

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Outage Details

Between 1:30p and 1:40p GMT there were an increased number of new streaming sessions that were failing to be established. Customers would have received the error message "received 3005 (registered) Session Cancelled: An error occurred; ".
Components affected
AssemblyAI Realtime API
Latest Updates ( sorted recent to last )
RESOLVED 8 days ago - at 09/30/2025 01:31AM

We have continued to see good performance since rolling back the update that was identified to be the cause of this issue, so we are marking this issue as resolved.

MONITORING 8 days ago - at 09/29/2025 07:32PM

We have continued to see stable performance throughout the day. The Streaming API is operating normally and we are monitoring the effects of recent changes to ensure continued service stability. Our team continues working to determine the root cause of the earlier connection failures.

INVESTIGATING 8 days ago - at 09/29/2025 03:41PM

Our team is still investigating the cause of the elevated errors, but the Streaming API is still continuing to function normally.

INVESTIGATING 8 days ago - at 09/29/2025 01:50PM

The Streaming API has now returned to full functionality. Our team is still investigating the root cause of this issue.

INVESTIGATING 8 days ago - at 09/29/2025 01:49PM

Between 1:30p and 1:40p GMT there were an increased number of new streaming sessions that were failing to be established. Customers would have received the error message "received 3005 (registered) Session Cancelled: An error occurred; ".

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