Spy Alliance is a WoW TBC Classic addon designed to help players monitor nearby same-faction Alliance players through a familiar Spy-style interface.
Main features include automatic nearby Alliance player detection, a real-time Nearby list, class-colored player names, sound alerts, player history, Last Hour tracking, Ignore and Kill On Sight lists, draggable and minimizable windows, and player information such as class, level, and guild when available.
Spy Alliance is designed to run alongside the original Spy addon, allowing players to use Spy for enemy Horde detection while using Spy Alliance to track nearby Alliance players at the same time.
Detection is based on player information exposed by the WoW client through available nameplate and unit APIs. Because of this, players hidden by mechanics such as Stealth may not be detected until the game client exposes them.