When comparing Pi-hole vs AdAway, the Slant community recommends AdAway for most people. In the question“What are the best ad blockers?” AdAway is ranked 2nd while Pi-hole is ranked 5th. The most important reason people chose AdAway is:
Use the hosts files to block ads, so it works for everything.
Specs
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Pros
Pro You can select a DNS like 1.1.1.1 or 8.8.8.8 and others
Pro Does not need a Pi
You can install this on any posix device that can run bash scripts eg your linux or unix server it also can run on windows with the subsystem for linux or with a docker container.
Pro Blocks ads for all network devices and browsers
No need to install blockers at the browser or OS level. Pi-hole works at the DNS (network) level so you only have to maintain and manage one authority.
Pro Frequent updates are easily applied
It takes one mouse-click to keep pi-hole updated and current with new blocked-site lists.
Pro Low-cost deployment
Installs on a $35 Raspberry PI SBC. Open-source software (donations accepted).
Pro Can whitelist blocked sites on the fly
If a blocked site comes up and pihole is set to display the block page, you can add it to the whitelist there and then.
Pro Can be used with a vpn from anywhere in the world
Pro Easy installer
It includes an easy shell installer.
Pro Regex blocking
Supports now regex blocking.
Pro System wide blocking
Use the hosts files to block ads, so it works for everything.
Pro Doesn't consume CPU time or memory
The app updates the hosts file periodically but doesn't need to run in the background in order to block ads, which is especially convenient for older phones.
Pro Can use systemless host
Can be used without modifying the system if rooted with magisk.
Pro Can use custom host files
Lots of people and keep their own updated host files used for blocking ads and ad away supports loading them in or even adding their source for autoloading.
Cons
Con Requires some advanced devOps skills
The tutorial and installation is pretty straight-forward but requires some technical chops to install. You should be comfortable with the Linux command line.
Con Can inadvertantly block sites that are required for other web-based services
For example, using pi-hole for websites that rely on 3rd-party sites can be broken by pi-hole if the 3P site references black-listed sites.
Con Unreliable because of Pi architecture
If you use it with a Pi, however, Pi-hole can run on any POSix device that can run curses like: Any Unix/Linux server, Windows servers with the Linux subsystem, routers, even toasters if they run on Linux.
Con Setup horror
Con Pages
It blocks the ads but doesn't delete the location of an ad.
Con Needs root (by design)
Needs root to update the hosts file.
Con Won't block same domain ads
Because the host file can only redirect domains, if the ad and content are on the same domain the ad will be displayed.