WWW vs Non-WWW Redirects: 5.9% of Ranking Sites Serve Both

    When we requested the opposite host (www or non-www) on 11,071 ranking sites, 5.9% served the page on both hosts instead of redirecting to one.

    Ranking sites that serve the homepage on both www and non-www, by best rank
    #13.8%
    2 to 55.4%
    6 to 105.4%
    11 to 207.2%

    Source: PageSpeed Matters. 11,071 ranking sites, Oct 2026.

    Correlation only; a duplicate host does not stop a site from ranking.

    Source: WWW vs Non-WWW Redirects: 5.9% of Ranking Sites Serve Both - PageSpeed Matters