Trello outage on Apr 25, 2025

What happened

Trello reported a major outage starting Apr 25, 2025, 18:39 UTC, affecting Trello.com, API, Atlassian Support - Support Portal, Atlassian Support Ticketing, Atlassian Support Knowledge Base. It was marked resolved at Apr 25, 2025, 19:12 UTC.

• The incident lasted 33m from first report to resolution.
• Trello had reported no other partial or major outages in the 90 days before it.

Latest update from Trello

### **SUMMARY** On April 25, 2025, between 18:18 and 18:33 UTC, Atlassian customers using Trello may have experienced service interruptions. The event was triggered by temporarily reduced capacity following a rollback deployment, with insufficient nodes to handle the load. Automated monitoring systems detected the incident within one minute and mitigated it by scaling up the deployment, which put Atlassian systems into a known-good state. The total time to resolution was about 15 minutes. ### **IMPACT** The overall impact was on April 25, 2025, between 18:18 and 18:33 UTC, on Trello. The incident caused service disruption to Trello users, resulting in reduced functionality, slower response times, and errors when performing key actions such as loading boards and cards. ### **ROOT CAUSE** The root cause of the incident was a failure to scale our nodes to optimal capacity caused by a release rollback. If an issue is found during a deployment, we can roll back to a previous release.

Read Trello's official incident report ↗

What our independent monitoring saw

Our independent monitoring of Trello started after this incident, so this report is based on Trello's status page.

Trello's overall reliability

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