Purpose: The article investigates the impact of the open archive initiative on the document supply of grey literature. Approach: The article is based on a comparative survey of five major scientific and technical information centres: The British Library (UK), CISTI (Canada), INIST-CNRS (France), KISTI (SouthKorea) and TIB Hannover (Germany). Findings: All major document suppliers are more or less deeply involved in the open archive movement, and this involvement has an obvious impact on the policy of acquisition, archiving and supply of grey literature (dissertations, reports, conferences etc.). Originality: The article is a follow-up study of our survey published in 2006.