# Sigma Computing change history Filter: kind=all. Query: `?kind=notable|all|pages|pricing|trust|legal|incident|incident_edit|incident_deleted|incident_update&history=&page=N`. Company profile: [Sigma Computing](https://rewindex.com/company/sigma-computing.md) ## Changes by kind | Kind | Changes | Notable | Latest (UTC) | | --- | --- | --- | --- | | Major incident | 21 | 21 | 2026-10-12 15:11 UTC | ## Timeline | When (UTC) | Kind | Change | Label | Summary | | --- | --- | --- | --- | --- | | 2026-10-12 15:11 UTC | Major incident | [Major incident: Service Degradation for writeback functionality on Databricks connections](https://rewindex.com/change/i9032334e3c6fe3.md) | outage | Sigma reported a major degradation affecting CSV uploads to Sample Connection and potentially Databricks writeback functionality, including Input Tables, caused by a Databricks AWS US West 2 service interruption. The incident started at 2026-10-12 15:11 UTC and was resolved at 2026-10-12 18:17 UTC, lasting 3 h 6 min; writeback failures were no longer occurring. | | 2026-09-26 15:25 UTC | Major incident | [Major incident: Export Failures Incident](https://rewindex.com/change/ia10c2442e95b78.md) | outage | Sigma Computing reported a major incident affecting password-authentication logins and scheduled exports across Azure, AWS and GCP, linked to an email-service disruption. Recorded from 2026-09-26 15:25 UTC to 2026-09-26 16:11 UTC (45 min), it was resolved after a fix; updates separately cited an approximate start of September 26, 2026, at 11:24 AM UTC. | | 2026-09-14 19:31 UTC | Major incident | [Major incident: Databricks Azure East US query timeout](https://rewindex.com/change/i0c5a82688cd53e.md) | outage | A major incident caused query execution failures and timeouts for Sigma connections to Databricks Azure East US, attributed to a Databricks service interruption. It started at 2026-09-14 19:31 UTC and was resolved at 2026-09-14 22:53 UTC, lasting 3 h 21 min; warehouse connections returned to normal. | | 2026-09-01 15:34 UTC | Major incident | [Critical incident: Widespread failures are preventing Sigma from loading for GCP-hosted organizations.](https://rewindex.com/change/i52b875be6b8f5a.md) | outage | A critical outage prevented GCP-hosted organizations in us-central1 from reliably accessing Sigma. The recorded incident ran from 2026-09-01 15:34 UTC to 2026-09-01 16:55 UTC (1 h 20 min), though Sigma reported an approximate start of 2:46 PM UTC. The postmortem attributed the disruption to a Google Cloud networking incident; services returned to normal. | | 2026-03-05 10:10 UTC | Major incident | [Major incident: Issue with Burst email exports are resolved](https://rewindex.com/change/i6809df7db42268.md) | outage | Sigma Computing reported a major outage of Burst email exports starting 2026-03-05 10:10 UTC, lasting 4 days 7 h until resolution at 2026-03-09 17:31 UTC; standard exports remained operational. Engineers deployed a fix and re-enabled Burst Email Exports at 03-07 01:27 UTC, with no recurring problems observed during subsequent monitoring. | | 2026-01-09 20:33 UTC | Major incident | [Major incident: Chat Support experiencing 3rd party outage](https://rewindex.com/change/i37c8dbc131171b.md) | outage | Sigma Computing’s major chat support outage ran from 2026-01-09 20:33 UTC to 2026-01-09 22:23 UTC, lasting 1 h 49 min. Third-party provider Intercom experienced an outage and reported implementing a fix; Sigma confirmed chat support was fully operational at resolution. Customers were directed to submit support tickets for urgent requests and warned of slower responses. | | 2026-01-05 21:38 UTC | Major incident | [Major incident: Scheduled Backend Tasks not running on AWS US](https://rewindex.com/change/if989190d842c56.md) | outage | Sigma Computing reported a major AWS US outage affecting scheduled exports, materializations, and warehouse view updates from 2026-01-05 21:38 UTC to 2026-01-05 23:33 UTC, lasting 1 h 55 min. A fix was implemented, and Sigma stated that queued tasks should start recovering automatically after resolution. | | 2025-06-12 18:58 UTC | Major incident | [Major incident: GCP Outage affecting Sigma organizations hosted on multiple cloud providers](https://rewindex.com/change/i9a7ecb7046648f.md) | outage | A GCP outage caused major errors for Sigma organizations on GCP, with possible impact on other cloud providers. Sigma reported onset at approximately 17:55 UTC June 12, 2025; the archived incident spans 2025-06-12 18:58 UTC to 2025-06-12 21:25 UTC (2 h 26 min), ending with full recovery. | | 2024-09-04 14:57 UTC | Major incident | [Major incident: Snowflake tables not loading on AWS US West 2](https://rewindex.com/change/id505c8da4749f6.md) | degradation | Sigma Computing reported a major degradation affecting AWS US West 2: long-running Snowflake table queries in Sigma Workbooks could time out. Updates placed onset around 14:00 UTC on September 4, 2024; the incident record started at 14:57 UTC, with a computed duration of 52 min. Temporary mitigation proved effective; resolution was recorded at 15:50 UTC. | | 2024-05-29 15:17 UTC | Major incident | [Major incident: Users Unable To Contact Live Chat Support](https://rewindex.com/change/i26589aee59ef35.md) | outage | Sigma Computing’s major live chat outage prevented users from contacting support through the Sigma application from 2024-05-29 15:17 UTC to 2024-05-29 17:23 UTC, lasting 2 h 6 min. Sigma directed customers to support@sigmacomputing.com during the outage and reported that its third-party chat service resolved the issue. | | 2024-02-22 19:30 UTC | Major incident | [Critical incident: Outage affecting Sigma organizations hosted on GCP](https://rewindex.com/change/i746e92dee6c78c.md) | outage | Sigma reported a critical outage affecting organizations hosted on GCP (US), preventing login and use of Sigma services. The incident record spans 2024-02-22 19:30 UTC to 2024-02-22 20:22 UTC (52 min), while updates report an approximately 18:00 UTC start and 18:35 UTC resolution. Sigma confirmed its mitigation measures were effective. | | 2023-11-08 20:53 UTC | Major incident | [Critical incident: Sigma organizations hosted on AWS US are not loading](https://rewindex.com/change/i267433d28e8f36.md) | outage | A critical outage left Sigma organizations hosted on AWS US stuck on loading screens, with impact starting approximately 20:39 UTC November 08, 2023. The incident record ran from 2023-11-08 20:53 UTC to resolution at 2023-11-08 21:54 UTC (computed duration: 1 h 0 min); mitigation measures restored app loading. | | 2023-10-06 20:27 UTC | Major incident | [Major incident: Users unable to enter edits to Workbooks](https://rewindex.com/change/ib2e7e1109dae4b.md) | outage | Sigma Computing reported a major incident in which users who had recently edited a Workbook received errors when making further edits. The recorded start is 2023-10-06 20:27 UTC, but resolution is listed earlier, at 2023-08-09 22:00 UTC; duration is unknown. Engineering completed a postmortem and linked an RCA on Sigma Community. | | 2023-10-03 13:41 UTC | Major incident | [Critical incident: Query failures for select organizations connected to Snowflake](https://rewindex.com/change/if31a8c8c4d3541.md) | outage | Sigma Computing reported a critical incident affecting Snowflake queries for a subset of users on AWS and GCP (US), returning "Bad request; operation not supported." It lasted 5 h 7 min, from 2023-10-03 13:41 UTC to 2023-10-03 18:48 UTC; Snowflake rolled back a server change globally, restoring access to workbooks and data warehouse connections. | | 2023-09-14 18:12 UTC | Major incident | [Critical incident: Unable to login and load workbooks for Sigma AWS US](https://rewindex.com/change/i6063188db7feac.md) | outage | Sigma Computing recorded a critical AWS US outage starting 2023-09-14 18:12 UTC that prevented users from logging in and loading workbooks. The incident lasted 2 h 7 min and was resolved at 2023-09-14 20:19 UTC; engineering implemented mitigation measures, but the root cause was not disclosed. | | 2023-09-14 14:41 UTC | Major incident | [Major incident: Workbooks not loading for Sigma users on AWS Snowflake](https://rewindex.com/change/i0b8caf6785a7e7.md) | outage | Sigma Computing reported a major outage causing workbooks not to load and queries to hang for AWS US and AWS EU users using Snowflake CDW. The final update corrected the start to approximately 2023-09-14 12:49 UTC; mitigation resolved it at 2023-09-14 17:24 UTC (computed duration: 2 h 43 min). | | 2023-09-06 20:56 UTC | Major incident | [Critical incident: Workbooks cannot be opened for all Azure-hosted orgs](https://rewindex.com/change/ibe25d9b7a12f4b.md) | outage | Sigma Computing reported a critical outage preventing all Azure-hosted organizations from opening workbooks, starting approximately 19:50 UTC Sep 6, 2023 and resolved at 2023-09-07 21:44 UTC (computed duration: 24 h 47 min). Azure Key Vault inaccessibility disrupted encryption/decryption; Key Vault recovery restored workbook and data warehouse connection access. Sigma stated customer metadata remained secure. | | 2023-09-06 20:24 UTC | Major incident | [Major incident: Materialization failures impacting GCP cloud-hosted orgs](https://rewindex.com/change/if3afcebdd265d7.md) | outage | Sigma reported a major incident causing materialization and CSV upload failures for GCP-hosted customers, including GCP (US). Recorded from 2023-09-06 20:24 UTC to 2023-09-06 21:16 UTC, it lasted 52 min. Mitigation resolved the issue; affected materializations were expected to recover on their next scheduled run or when manually retriggered. | | 2023-08-14 17:34 UTC | Major incident | [Major incident: Incorrect timestamps returned from warehouse for some customers](https://rewindex.com/change/i1ed3209523bf86.md) | degradation | Sigma Computing reported a major incident affecting some customers: warehouse timestamps were off by their UTC offset, and date\_trunc() could return incorrect values due to code refactoring. The recorded start is 2023-08-14 17:34 UTC, but resolution is dated earlier, 2023-08-07 17:32 UTC; duration is unknown. | | 2023-08-14 14:52 UTC | Major incident | [Major incident: Exports with Color Conditional Formatting of "None" Failing](https://rewindex.com/change/i3c6131f8fce557.md) | outage | Sigma Computing reported a major (Severity 0) incident affecting Excel and CSV exports from some workbooks with Color Conditional Formatting of "None". It started at 2023-08-14 14:52 UTC and was marked resolved at 2023-08-14 17:07 UTC, lasting 2 h 15 min. Sigma later published a postmortem link; no cause or fix is detailed in the evidence. | | 2023-07-27 13:29 UTC | Major incident | [Major incident: Scheduled exports using image (PNG) files erroring](https://rewindex.com/change/i48ab0e7188ff35.md) | outage | Sigma Computing reported a major (Severity 0) incident affecting all scheduled export types, with errors later described as intermittent across AWS, Azure and GCP. It started at 2023-07-27 13:29 UTC and was resolved at 2023-07-27 14:13 UTC, lasting 44 min. Sigma implemented a fix and said customers could resend impacted exports. | --- Canonical: https://rewindex.com/company/sigma-computing/changes · Markdown: https://rewindex.com/company/sigma-computing/changes.md · JSON: https://rewindex.com/api/v1/companies/sigma-computing/changes · Generated 2026-10-18T02:24:30.126Z