Klaviyo: Incident updated: Outbound Webhook Delays

Incident updateNormal progress (rule, 100%)Changed 2026-10-23 13:13 UTCstatus.klaviyo.com

Summary

Summary pending. The diff below shows exactly what changed.

Incident page: the full timeline of updates

What changed

~~Struck in red~~ is what Klaviyo removed; blue is what they added. Muted text is unchanged context.

ChangedStatus#1

~~monitoring~~

resolved

AddedResolved time#2

not present

2026-10-23 13:06 UTC

AddedUpdateresolved2026-10-23 13:06 UTC#3

not present

Event webhook delivery was fully restored at 2:40 AM US/Eastern on October 23, 2026 after the backlog was processed. Webhook data was retained, and webhook actions in flows were not affected. We apologize for the disruption this caused. This incident has been resolved.

Compared with the previous archived version of this incident (10 to 30-minute polling). View the live incident (opens in new tab).

Archive proof

Rewindex commits each version of an incident it captures to a daily checkpoint, chains it to the day before, and has the checkpoint timestamped by FreeTSA and DigiCert. That proves these records existed by then and have not been changed since, by anyone, Rewindex included.

How the archive is checked, and what it cannot prove.

Oct 23
Before captured 04:13 UTC
In the 2026-10-23 checkpoint, timestamped by FreeTSA and DigiCert on Oct 24, 00:41 UTC. Record hash 33d1db574fb62835…
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Oct 23
After captured 13:13 UTC
In the 2026-10-23 checkpoint, timestamped by FreeTSA and DigiCert on Oct 24, 00:41 UTC. Record hash c5c1e22a9c3c5027…
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History of this incident

Friday, October 23

2 incident changes

Normal progress
13:13Incident
Incident updateOutbound Webhook Delaysthis change
Normal progress
04:13Incident
Incident updateOutbound Webhook Delays

Thursday, October 22

1 incident change

Degradation
22:20Major incident
Outbound Webhook Delays
Klaviyo reported a major Analytics incident starting 2026-10-22 22:20 UTC: some customers and connected third-party apps experienced event webhook delivery delays. New webhook processing was temporarily paused, earlier webhooks continued arriving late, and webhook data was retained; flow webhook actions were unaffected. The incident remained open when archived, with 0 minutes elapsed at the last update.

Cite this

Incident updated: Outbound Webhook Delays on Klaviyo’s status page, changed 2026-10-23 13:13 UTC (change 3 of 3).

Title: Incident updated: Outbound Webhook Delays
Vendor: Klaviyo
Date: 2026-10-23 13:13 UTC
URL: https://rewindex.com/change/r08ac84f5a58d63

All Klaviyo changes Klaviyo profile Markdown JSON