- Level
- confirmed
- Worst impact
- Degraded
- Components
- Server-side
- Regions
- us
- Down Index
- 21of 100
What to do
Check whether you use Klaviyo Server-side in us. Check your stack
Paste a package.json, lockfile, Terraform or a list of domains at down.guide/stack to see every provider you depend on.Confirm your retries, queues and scheduled jobs caught up after the 47m it lasted.
Anything that failed between 2026-04-26 07:24 UTC and 2026-04-26 08:11 UTC may need a replay.Subscribe to Klaviyo's feed to hear about the next one first. RSS feed
https://down.guide/feed?provider=klaviyo works in Slack (/feed subscribe), Discord feed bots and any RSS reader.
Updates from Klaviyo 3
- identified
Starting at approximately 2:27 AM US/Eastern on 04/25/2026, we began experiencing intermittent elevated errors across our APIs. Some customers may experience 503 errors when trying to log into Klaviyo, load certain pages or make API requests. Our Engineering Team has identified the root cause and has implemented mitigations. We'll provide updates as soon as more information is available.
provider
- monitoring
We successfully implemented a fix as of 3:20 AM US/Eastern that restored all API activity. We are continuing to monitor the results.
provider
- resolved
We confirmed that all API activity has been stable since the fix was released. Any requests that returned 503 errors during the outage window will need to be retried. This incident has been resolved.
provider
Reports count in aggregate; nothing about you is shown.
Corrections
None so far.
Something wrong on this page? Report an error or send us a note. Every fix is listed here.
Questions about DWN-03f8a72366
Is Klaviyo still down?
No, this incident was resolved 2026-04-26 08:11 UTC. For Klaviyo's live state, see https://down.guide/klaviyo.
How long did it last?
47m, from 2026-04-26 07:24 UTC to 2026-04-26 08:11 UTC, by the times Klaviyo posted.
What was affected?
Klaviyo named Server-side in us.
What caused it?
Klaviyo hasn't published a root cause. If it does, it shows here.
Where does this come from?
Klaviyo's official status page, https://status.klaviyo.com, quoted verbatim. down.guide's own probes, reports and social counts are labeled as ours.