can I use wordfence and ithemes security plugin together in wordpress website. or using these two plugin together will make my site lagging.
It’s probably not a good practice to mix security plugins for a variety of reasons. Not sure why you would want to do that anyway.
It is not recommended to use two security plugins together but you can. However, it won’t have any significant impact versus using a single security plugin. You may do a bit of research before selecting the right WordPress security plugin for your website.