Email Signup Tools: Klaviyo Outnumbers Justuno and Privy 30 to 1

    Klaviyo appears on 159,251 of 40.3M homepages crawled in 2026, against 3,680 for Justuno and 1,472 for Privy.

    CWV pass rate with vs without an email popup or form tool, by platform
    Shopify with61.4%
    Shopify without57.3%
    WooCommerce with26.6%
    WooCommerce without36.5%
    Other platforms with41.3%
    Other platforms without41.2%

    Source: PageSpeed Matters. HTTP Archive top 1M crawl, Sept 2026, mobile, CrUX p75.

    Correlation only. Signup tools do not make stores faster; the overall gap reflects platform mix.

    Source: Email Signup Tools: Klaviyo Outnumbers Justuno and Privy 30 to 1 - PageSpeed Matters