Pi-hole or AdGuard for home dns-based blocking?

https://lemm.ee/post/11576049

Pi-hole or AdGuard for home dns-based blocking? - lemm.ee

Hey folks, I just realized my pihole server, running on a Ras Pi 3 needs to be rebuilt from scratch. I’ve seen many mentions of AdGuard DNS here though. What’s your thinking on which is better now? We’re a small family, looking for a basic ad blocking, set it and forget it, solution.

Is Adguard open source? Glancing at their web, it doesn’t seem to be.

What about nextdns?