Customer.io experienced a major incident on June 13, 2026, lasting 2h 41m. The incident has been resolved; the full update timeline is below.
Update timeline
- investigating Jun 13, 2026, 09:18 PM UTC
We are aware of an issue affecting access to our web application. Customers may encounter ERR_CONNECTION_REFUSED when attempting to access the UI. At this time, we are not aware of any impact beyond UI accessibility. Message processing and delivery continue to operate normally. Our team is actively investigating the issue and working to restore full service as quickly as possible. We will provide updates as more information becomes available.
- identified Jun 13, 2026, 10:21 PM UTC
The team has identified the issue and is actively working on a fix
- monitoring Jun 13, 2026, 11:46 PM UTC
A fix has been implemented and the systems are recovering. We are monitoring UI for any other issue.
- resolved Jun 14, 2026, 12:00 AM UTC
This incident has been resolved.