Changes / Amplitude / Amplitude web application not loading

Amplitude: Major incident: Amplitude web application not loading

Summary

Amplitude reported a major US web application outage starting 2026-04-23 19:56 UTC, resolved at 2026-04-23 20:32 UTC (35 min). Customers could encounter page-loading errors; EU and data ingestion were unaffected, with no data lost. Amplitude attributed the issue to a misconfigured feature-flag configuration and reverted the change.

Machine-written from the diff below (Sol; type: incident outage). Check the diff before relying on it.

Major incidentLabel: outage (model (Jev), 100%)Changed Detected Source: stspg.io (opens in new tab)

What changed

AddedTitle#1
Before: not present
After: Amplitude web application not loading
AddedImpact#2
Before: not present
After: major
AddedStatus#3
Before: not present
After: resolved
AddedStart time#4
Before: not present
After: 2026-04-23 19:56 UTC
AddedResolved time#5
Before: not present
After: 2026-04-23 20:32 UTC
AddedAffected components#6
Before: not present
After: Analytics - Web Application, Audiences - Web Application, Data - Web Application, Experiment - Web Application, Guides & Surveys, MCP, Web Application
AddedUpdateinvestigating#7
Before: not present
After: Amplitude web application in US is not accessible. The issue started around 12:20 PST we're still investigating the root cause. Amplitude in EU is working as expected. a) Our ingestion systems were working as expected and we were not losing any data. b) Impacted customers might experience errors when loading Amplitude web pages.
AddedUpdatemonitoring#8
Before: not present
After: We have identified the issue to be related to a misconfigured configuration in our feature flags. We have reverted the change as of 1PM PT and we should be back to normal now. We'll still monitor this for a bit before resolving the issue.
AddedUpdateresolved#9
Before: not present
After: This incident has been resolved.

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History of this incident

When (UTC)ChangeKind
Major incident: Amplitude web application not loading (this change)
Amplitude reported a major US web application outage starting 2026-04-23 19:56 UTC, resolved at 2026-04-23 20:32 UTC (35 min). Customers could encounter page-loading errors; EU and data ingestion were unaffected, with no data lost. Amplitude attributed the issue to a misconfigured feature-flag configuration and reverted the change.
Major incident

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