To hide prices for guests in Magento 2, you can utilize extensions like Amasty's Hide Price & Add to Cart. This module allows you to replace the price with a message such as "Login or register to see the price," showing it only to registered users. While some extensions may cause conflicts, working with experienced developers or Amasty specialists can ensure smooth compatibility. Additionally, if you're using features like magento 2 ajax add to cart programmatically make sure that the module doesn’t interfere with these functionalities.