Hi Kristina,

I am very sorry for the late reply, we were not working on the weekend.

Neuron Themes is fully compatible with Elementor the free and the pro version. The decision will be up to you to make. But you don't need to purchase the Elementor Pro version in case to use our themes, as we create themes that can be used with Elementor Free version.

Feel free to ask for anything you need.

Kind Regards