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MUI adoption & performance trends

2 quarters of aggregate data

Unique domains per quarter

MUI -- Unique domains per quarterMUI -- Unique domains per quarter05.210.415.720.9Q2 '26Q3 '26

Median composite score

MUI -- Median composite scoreMUI -- Median composite score0255075100Q2 '26Q3 '26

Median Lighthouse performance

MUI -- Median Lighthouse performanceMUI -- Median Lighthouse performance0255075100Q2 '26Q3 '26

Median Lighthouse accessibility

MUI -- Median Lighthouse accessibilityMUI -- Median Lighthouse accessibility0255075100Q2 '26Q3 '26

How this is calculated

Each point is the median across all public MUI audits completed that quarter. Quarters with fewer than 3 audits are skipped.

Learn more about our methodology →

Raw data

QuarterUnique domainsCompositePerformanceAccessibility
Q2 '2619733391
Q3 '263814987