K9 Web Protection, AdGuard, Blokada, AdAway, NextDNS, Portmaster, simplewall, Zscaler, RethinkDNS, Energized Protection, AdGuard Home, OpenSnitch, Nano Adblocker, Adblock for iOS, StopAd, Shelblock, AdClear, upribox, Technitium DNS Server, Trustnav, Adaware Ad Block, HQ VPN, Privoxy, Adblock Radio, DnsAdBlock, SmartAdBlock are some alternatives to Pi-hole.