AdGuard have a free product called “AdGuard Home” that’s like PiHole but more powerful. It lets you run a DNS server on your own network that blocks ads, and uses encrypted DNS queries (DNS-over-HTTPS and DNS-over-TLS) to prevent your ISP from snooping on the requests. Some ISPs build ad targeting profiles based on the sites you visit, and just using a third-party DNS server (like Google’s 8.8.8.8 or Cloudflare’s 1.1.1.1) doesn’t solve this since it’s still clear-text and the ISP can still collect the data.
This lets you block ads on devices that can’t run adblockers, like TVs. It runs well on even the cheapest Raspberry Pi 4B, too.