AdGuardDNS

almost the same as NextDNS feature wise

Limit is also 300k per month. Plus additional device and server limitation.

Added benefit is they send you weekly status mail.

A word of advice, don’t leave their dashboard open for too long. The page request thousands of DNS request within minutes (to check for the connectivity status).

RethinkDNS AdguardDNS

you can customize the filter list.

NextDNS and Adguard free tier has limitations such as number of devices, max num of request 300k.

If you have chatty clients such as Xiaomi phone, mikrotik router, web pages of their dashboard, 300k is not simply enough.