International audienceFaced with the deluge of massive amounts of data (big data) today’s journalism wonders about its practices, and also about the economic models of the media and the organization of editorial teams. The issues are multifaceted. At first we emphasize the epistemological reluctance of the profession to the promises of totally automated journalism. Actually data journalism is always linked with an identified ground to which data must refer in order to validate it. Then we show that the massive use of data enables the media not only to personalize their offer of information more precisely, but also to promote an innovation process which tends to combine the know-how of journalism with technical skills unrelated to the journa...