With the use of YITH WooCommerce Catalog Mode, you can show or hide the price and/or the “Add to cart” button for products of your shop. If hidden, you can provide a form through which users can send possible requests, like the ‘contact us’ button in the example below.
To make the two plugins work together, you will only have to activate them both. The integration between these two plugins allows you to hide the price and ‘Add to cart’ button also on products with add-ons.