Users with access to multiple accounts being unable to switch accounts

What to do

• Check whether your product depends on Klaviyo. 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 1h 30m it lasted.

  Anything that failed between 2025-12-22 22:37 UTC and 2025-12-23 00:07 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 4

1. investigatingDec 22, 2025, 10:37 PM UTC

   We are investigating reports of users unable to switch accounts once logged into Klaviyo

   provider

2. investigatingDec 22, 2025, 11:37 PM UTC

   We identified broader service disruption across the Klaviyo app between 5:55 pm and approximately 6:10 pm ET. While initial reports were limited to account switching, we have since confirmed additional impact to app availability and functionality. The underlying issue has been addressed, and the app is now available. Some customers may continue to experience intermittent issues as systems fully recover. We are actively monitoring.

   provider

3. monitoringDec 22, 2025, 11:58 PM UTC

   We have confirmed the app is now widely available and are moving the incident to monitoring. 10% of accounts experienced messaging delays during this window. We are working to replay any impacted messages, including unsubscribes, inbound SMS, and flows. Any campaigns that failed during this time will need to be manually resent. We will continue to monitor system performance.

   provider

4. resolvedDec 23, 2025, 12:07 AM UTC

   This incident has been resolved.

   provider

Corrections

None so far.

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