Amigos dos Amigos (ADA, Friends of Friends) is a criminal organization that operates in the Brazilian city of Rio de Janeiro. It was started up in 1998 when a member of Comando Vermelho was expelled from the organization for ordering the murder of another member. The gang's main rivals are Comando Vermelho and Terceiro Comando Puro. ADA controls many drug selling points in the North and West zones.
ADA currently controls Rocinha, the largest favela in Rio de Janeiro, along with many other smaller favelas. With the assassination of the gang leader Bem-Te-Vi in 2005 by police, there was a renewed wave of violence as gangs fought for control over favelas previously controlled by ADA.