Abstract
The evolution processes of agile and lean software development are intertwined. Recently a shift from agile methods to lean software development has been noticed and advocated. To truly comprehend this phenomenon theoretically and practically, we take a step back and investigate the key differences between agile and lean software processes, the understanding of which is still limited. A content analysis of a popular mailing list of the lean community, called kanbandev, is being conducted. The results of the study unveil the perspectives of the lean community on the differences between agile and lean software development processes.