In the last 90 days, Klaviyo had 2 major incidents totaling 5 hours 26 minutes of downtime, per StatusBird's independent 2-minute monitoring. That works out to 99.74% availability and a B+ reliability grade.
Short-term numbers only tell part of the story, so below is the full data, how Klaviyo compares to its category, and how to track future incidents without watching a status page all day.
Klaviyo outage history: the last 90 days
| Metric (90 days, as of July 2026) | Value |
|---|---|
| Availability | 99.74% |
| Reliability grade | B+ |
| Major incidents | 2 |
| Total major-outage downtime | 5 hours 26 minutes |
| Average incident duration | 2 hours 43 minutes |
| Most recent major incident | June 12, 2026 |
| Checks in window | 61,600 |
Among the 10 email and SMS marketing services StatusBird monitors, Klaviyo ranks number 9 for 90-day availability. See the full ranking of email and SMS marketing tools by reliability.
Does a Klaviyo outage affect your store?
During a Klaviyo outage, automated flows stop or lag: abandoned cart and welcome emails do not go out on time, and revenue those flows normally generate pauses. Scheduled campaigns may fail to send, which is costly during a promotion. On-site signup forms and popups may not load, so list growth stalls, and event syncing from your store can fall behind, meaning triggers fire late or segments become stale.
How can I track Klaviyo outages?
Three ways, from slowest to fastest. Klaviyo's official status page at status.klaviyo.com is authoritative but often acknowledges incidents late. StatusBird's live Klaviyo status page reflects independent checks every 2 minutes. Fastest is an alert: StatusBird sends SMS, email, or Slack notifications the moment Klaviyo's status changes, so you find out before customer emails do.
Frequently asked questions
Will my abandoned cart emails send after the Klaviyo outage ends?
Usually yes but late. Klaviyo queues triggered events and works through the backlog after recovery, so most flow messages eventually deliver. Emails with time-sensitive content or short expiry windows may arrive after they are useful, so review those sends manually.
My campaign was scheduled during the Klaviyo outage. Did it send?
Check the campaign's recipient and delivery stats after recovery rather than assuming. Some sends complete late, some partially deliver, and some fail entirely. If it only reached part of the list, resend to a segment excluding those who already received it to avoid duplicates.
How this data is measured
StatusBird checks Klaviyo's status every 2 minutes, around the clock, independently of the vendor. The availability figure counts major and critical outages only; minor degradation is excluded so numbers are not skewed by vendors that report small blips near-continuously. Grades run from A+ to F. See the live numbers on the Klaviyo reliability page and current status on the Klaviyo status page, or browse all 84 service grades.
Know before your customers do
StatusBird monitors Klaviyo and 83 other services online stores depend on, plus your own storefront, every 2 minutes. When something goes down you get an SMS, email, or Slack alert with plain-English context, usually before the official status page catches up. Start monitoring free, no card required for the free plan.