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This article presents a comparative analysis of two native informants associated with the Native Control and Assistance Service of the Ministry of the Colonies (CAI) in the inter-war period. These two individuals exhibit distinct profiles. The first, Đặng Đình Thọ – also known as Agent Thomas – hails from the popular Indochinese demographic. Employed in the navigation sector, he represents the mobile colonial proletariat. Initially a communist, he underwent training in Moscow before being recruited by the intelligence service. The second informant, Thomas Ramananjato, originates from the Malagasy bourgeoisie and served under the French flag during the First World War. Identifying as a patriot, he joined the CAI using the pseudonym Agent Joe, subsequently emerging as a prominent figure in the French anti-imperialist movement. This article aims to explore the pivotal factors influencing the collaboration of these native informants with the Ministry of the Colonies and its associated services.