The best alternatives to Juky are Partyhero, Auxify, and auxcord.org. If these 3 options don't work for you, we've listed a few more alternatives below.
Let your guests queue their own songs, without them needing any accounts: A simple page to instantly wish for songs. Your Sonos system is managed by auxcord, disabling hardware buttons so you control the volume and playlist Currently works with Spotify + Sonos
Everyone becomes the DJ with Mixtape! Create an event, connect your Spotify, and then let your friends fill your Spotify queue. Mixtape allows you to curate incoming requests and even create a Spotify playlist to share once your done, so everyone can enjoy!