The Interstellar Alliance is a cooperating group of 554 different ET civilizations most of whom reside within the Milky Way galaxy.  The ET races of the Interstellar Alliance are typically much more advanced than humanity, of a higher density and have positive intentions towards Earth & humanity.  These civilizations make up the majority of the ET's who interact with Earth. 

 

Current known ET races within the Interstellar Alliance:

 

Essessani

Yah-Yel