Hello guys from Germany, here an helpful information for all who are looking for a DSGVO compliant alternative for Google recaptcha. The newest version of ECC+ (- EasyCalcCheck Plus Pro - Joomla! 4) is available and offers an integration with the SP Form Builder. Looks good.

Solution: I created the overwrite of the form add-on according to these instructions www.joomshaper.com/forum/question/8829 and inserted {easycalccheckplus} above the output of the submit button in site.php - in this form:

    // ECC
      $output .= '<div class="sppb-form-group">';
    $output .= '{easycalccheckplus}';
    $output .= '</div>';

    // Button
    if ($btn_text) {
        $output .= '<div class="sppb-form-builder-btn' . $btn_position . ' ' . $btn_custom_class . '">';
        $output .= '<button type="submit" id="btn-' . $addon_id . '" class="sppb-btn' . $btn_class . '" aria-label="' . strip_tags($btn_text_aria) . '"><i class="fa" aria-hidden="true"></i>' . $btn_text . '</button>';
        $output .= '</div>'; //.sppb-form-builder-btn
    }

BW Uwe