On September 3, 2025, at 15:58 UTC, we received alerts indicating that several workspaces weren't loading. This was quickly followed by reports from customers experiencing an inability to access some of their workspaces. This issue affected the following region(s):
us3: Cloud - US
us5: Cloud - US East
Our investigation identified a localized infrastructure issue that impacted how our internal systems communicated within a specific operational zone. New application pods within the affected zone were unable to resolve internal network addresses, preventing workspaces from launching.
Our engineers immediately intervened, systematically re-routing affected workspaces to healthy infrastructure. This work was completed at 17:23 UTC, and access to all impacted workspaces was restored.
In addition, we opened a support case with our cloud provider, Google Cloud Platform (GCP). GCP confirmed that the root cause was an infrastructure failure within one of their availability zones.
While the issue originated with our vendor, our priority is protecting our platform from these events, regardless of their origin. To prevent a recurrence of this issue, we are enhancing our monitoring and alerting of cloud provider services to improve how quickly we can identify potential issues. In addition, we are conducting a full post-mortem with our cloud provider to ensure they're implementing measures to prevent a repeat of the failure.
We apologize for any impact this issue may have had on your business operations. We are continuously strengthening our systems and procedures to ensure we avoid future disruptions to your business and users.
If you have further questions or concerns, please visit the Anaplan Support website. Thank you for your patience during this situation and thank you for being an Anaplan customer.