Widespread failures are preventing Sigma from loading for GCP-hosted organizations.

Update timeline

1. investigating Sep 01, 2026, 03:34 PM UTC

   We have received reports of errors causing users to be unable to utilize all portions of the Sigma application. We are investigating the issue at the highest priority. Our preliminary investigations indicate the following: Impacted Cloud Regions & Services: organization hosted on GCP User Experience: Unable to load Sigma Incident Start Time: Approximately 3:06 PM UTC We will provide updates on this page in the next 1 hour.

2. monitoring Sep 01, 2026, 04:23 PM UTC

   Our engineers are seeing signs of recovery from an outage associated with GCP and related networking failures. We are monitoring the service closely and awaiting confirmation from Google Cloud that the incident is fully resolved before declaring this issue resolved. We will provide another update when we have further information. Impacted Cloud Regions & Services: Sigma users hosted on GCP User Experience: We expect GCP-hosted users starting to be able to load Sigma, open workbooks, or render reports fine Incident Start Time: Approximately 02:46 UTC Sep 1, 2026

3. resolved Sep 01, 2026, 04:55 PM UTC

   This incident has been resolved. Our engineers are seeing services have returned to normal. Multiple customers have confirmed that they can load Sigma successfully. We apologize for the inconvenience and will continue monitoring the service closely. We will perform a root cause analysis (RCA) and publish our findings in a postmortem note to the Sigma Community site in coming days. Impacted Cloud Regions & Services: Sigma users hosted on GCP User Experience: GCP-hosted users will be able to load Sigma, open workbooks, or render reports without any issues. Incident Start Time: Approximately 02:46 PM UTC Sep 1, 2026 Incident End Time: Approximately 05:29 PM UTC Sep1, 2026

4. postmortem Sep 08, 2026, 05:59 PM UTC

   **Incident date:** September 1, 2026 **Duration:** Approximately 90 minutes **Affected service:** Sigma organizations hosted in Google Cloud Platform \(GCP\) us-central1 ## Summary On September 1, a Google Cloud networking incident in part of the us-central1 region interrupted connectivity to Sigma services. Customers hosted in GCP us-central1 were unable to reliably access the Sigma application, administration UI, workbooks, and some embedded experiences. No Sigma code or configuration change triggered the incident. ## Root cause During routine maintenance, Google Cloud experienced a network failure in part of the us-central1-b zone. Sigma services in the region had a non-redundant network dependency in the affected zone, so a zone-scoped failure caused a broader service disruption for customers hosted in the region. See the [Google Cloud incident report](https://status.cloud.google.com/incidents/J5ia5t9p3g9Q5Wi7r8Ev) for details about the cloud provider event. ## Resolution Google Cloud restored the underlying network service, and Sigma recovered without a Sigma-side deployment. Customers did not need to make changes to resume using Sigma. ## Corrective actions Sigma is taking the following actions: * Increase network redundancy across affected Sigma services in this region. Other regions are not impacted by the same deficiency as that in us-central1. * Add additional production health monitoring that operates independently of the environment it monitors. * Improve zone-level availability monitoring and alerting for external status pages. * Improve retry and recovery behavior for background workloads \(including materialization\) during transient network failures. We apologize for the disruption and are using this incident to improve the resilience and independent detection of Sigma services.