Major
March 27, 2026
March 2026: Real-time segmentation delays
Detected
Mar 27, 2026 12:46 AM EDT
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Resolved
Mar 27, 2026 1:19 AM EDT
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Duration
33 minutes
Klaviyo experienced delays in real-time segment processing starting at 8:15 PM US Eastern on March 26th, affecting a subset of customers with segments becoming out of date by up to 2.5 hours. The engineering team identified and implemented a solution within 33 minutes. Real-time segmentation functionality was fully restored and returned to normal processing speeds.