Oh thanks, that looks like an interesting alternative

> Can you setup custom filters on the free solution?

No, but as the other person replying said, there's a huge range of built in filters and I've never felt any need to customize them.

EDIT: just spent a few minutes looking over the DNS4EU website. I can't see any configuration options at all. They just have 4 basic levels (standard, child protection, ad block, or unfiltered). So it appears less useful than NextDNS. Where did you see the ability to add custom filters?