AbstractThe boost to activism to which the internet has largely contributed has been underlined by financial and image issues growing from hacker attacks and the online promotion of activist groups. Emergency corporate counteractions with regard to these cyber threats have not analysed this new phenomenon. The state of the research in this area has consistently remained at the period before the development and widespread use of the internet. Cyberactivism, therefore, is a cyber phenomenon without a clear meaning or a clear definition.In order to understand cyberactivism, it is important to understand that it is much more than simply about hacking and activists' online promotion. It is a new phenomenon, growing out of activism but changing the pressure on corporations. With the internet, new dynamics of issue selection have been established and a different aggregation within groups has taken place. A new organisational set‐up among activist groups puts new pressure on corporations, which must develop new strategies concerning online rules. Cyber actions are originated by individuals triggering a spontaneous relationship between many users. The pressure is no longer the result of a long aggregation into association, but of an immediate and spontaneous network of relationships. Copyright © 2003 Henry Stewart Publications