Research on how adults react to receiving an autism diagnosis is focused on the United States or the United Kingdom context even though cultural differences might have an impact on these experiences. Few interventions for autistic adults exist, and when they do, they are often described as inappropriate. Our study aimed to explore the experiences of French adults diagnosed with autism and the needs they identified following this diagnosis as well as to ask them directly what type of interventions they would have wanted. We conducted semi-structured interviews with 12 adults and identified three recurring themes: (1) reactions to the diagnosis, (2) relations with others and society, and (3) wants and needs. Results indicated that some experiences were congruent with existing Anglophone literature, while others were heavily influenced by the specific cultural context. Our participants also highlighted a number of unmet needs and offered suggestions for adequate interventions.