Can I use Contact Form DB plugin in my wordpress site for saving and displaying data without sending emails

Solution:

You can use wpcf7_before_send_mail action hook to prevent form being sent to email.. (I have tested this with “Contact Form DB” plugin – it saves data before email is filtered)

To filter only specific Form IDs – use something like this:

function wpcf7_skip_email_sending($wpcf7_data)
{
    if ( in_array($wpcf7_data->id(), array(2,3,7)) ) {
        $wpcf7_data->skip_mail = true;
    }
}
add_action("wpcf7_before_send_mail", "wpcf7_skip_email_sending");

(For older CF7 version you might have to change $wpcf7_data->id() to $wpcf7_data->id)