Headless CMS Performance: No Platform Beats Wix's 53% Pass Rate

    "Headless is faster" is a common claim. The field data on 23,747 origins shows Sanity and Prismic passing Core Web Vitals just above average, Contentful right at it, and none matching the fastest hosted builders around 53%.

    Core Web Vitals pass rate, headless CMS (mobile)
    Ghost (see note)
    50.8%
    Sanity
    47.1%
    Prismic
    47%
    Contentful
    40.4%

    Source: PageSpeed Matters analysis of 23,747 headless CMS origins with CrUX field data, mobile, May 2026.

    The web-wide average is about 42% and the fastest hosted builders sit near 53%, so headless lands modestly in between.

    Good loading (LCP) by headless CMS (mobile)
    Ghost
    88.1%
    Prismic
    70.3%
    Sanity
    68%
    Contentful
    62.9%

    Source: PageSpeed Matters analysis, mobile 75th-percentile field data, May 2026.

    Loading, not responsiveness, separates these platforms, and it tracks how heavy each frontend is.

    Source: Headless CMS Performance: No Platform Beats Wix's 53% Pass Rate - PageSpeed Matters