The maintainer of DNSCrypt stopped supporting it, closed the repository on GitHub and put the domain on sale. The repository has already been cloned and is now maintained by Dyne. Unfortunately, they do not plan to add any new features, so DNSCrypt is abandoned in favor of the "DNS over TLS" standard.
DNSCrypt is a protocol for encrypting requests between a computer and a DNS server. This encryption prevents the possible interception of queries with an aim of altering them or eavesdropping. DNS hijacking helps ISPs implement censorship, gather data for ad targeting and other purposes.
The King is dead, long live the King
The alternative to DNSCrypt is the "DNS over TLS" protocol. Unlike DNSCrypt, "DNS over TLS" has an RFC standard and this is actually a serious advantage. With standardization, operating system manufacturers can provide implementations in every platform, and in fact, it's already in progress on Android, and we expect more to follow.
We find this protocol very promising, but it is not widely supported yet. However, we are pretty sure that this number will grow.
What about AdGuard DNS?
AdGuard DNS started supporting DNSCrypt back in 2016. We will continue to support it for at least a year. Besides, we will add "DNS over TLS" support in the coming months.
Update: The original maintainer of DNSCrypt has launched a new implementation of the protocol — DNSCrypt-proxy 2.0.0 alpha. So probably DNSCrypt reincarnated to a better and more reliable version. A list of new and planned features can be found at github.com/jedisct1/dnscrypt-proxy