# Klaviyo: AWS incident affecting components of Klaviyo application

- Impact (vendor’s label): minor
- Status: resolved
- Started: 2021-12-22 13:26 UTC · Resolved: 2021-12-23 02:28 UTC · Duration: 13 h
- Updates: 1
- [Vendor status page: https://status.klaviyo.com/incidents/93cjkmnvct2f](https://status.klaviyo.com/incidents/93cjkmnvct2f)
- [Company: Klaviyo](https://rewindex.com/company/klaviyo.md)

## Part of an outage event

- [AWS us-east-1 outage, Dec 22, 2021: 40 vendors, 40 incidents](https://rewindex.com/events/2021-12-22-aws-us-east-1)
- This incident blames AWS as the cause. (hop 1, posted +44 min vs the first vendor naming AWS)
- Evidence: “…AWS incident affecting components of Klaviyo application Open incidents for downstream providers are now resolved. Upon assessing impact, fewer than 1% of event-triggered marketing flow messages were…”

```mermaid
flowchart LR
  root["AWS us-east-1<br/>own incident not archived"]:::inferred
  h1["Within an hour<br/>8 vendors, 6 blamed AWS<br/>Firebolt, Bitbucket, HubSpot, CircleCI +4"]:::blames
  root --> h1
  h4["1 to 4 hours later<br/>1 vendor<br/>Confluent"]:::names
  root --> h4
  me["Klaviyo (this incident)<br/>posted +44 min"]:::me
  h1 --- me
```

_Detected automatically from incidents that started together and named the same provider; a link means one incident named another vendor, not a confirmed cause._

## Timeline of updates

- **resolved** 2021-12-23 02:28 UTC: Open incidents for downstream providers are now resolved. Upon assessing impact, fewer than 1% of event-triggered marketing flow messages were impacted during this window, and no transactional flow messages were lost. This incident is now resolved.

_From the vendor’s published history: only the final update text is available for incidents before Rewindex began polling this page._


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Canonical: https://rewindex.com/company/klaviyo/incidents/93cjkmnvct2f · Markdown: https://rewindex.com/company/klaviyo/incidents/93cjkmnvct2f.md · JSON: https://rewindex.com/api/v1/companies/klaviyo/incidents/93cjkmnvct2f · Generated 2026-10-20T00:04:07.861Z