Without recruitment terrorism can not prevail, survive and develop. Recruitment provides the killers, the suicide bombers, the kidnappers, the executioners, the engineers, the soldiers and the armies of future terrorism. The internet has become a useful instrument for modern terrorists’ recruitment and especially of foreign fighters. Online platforms and particularly the new social media (e.g., Twitter, Facebook, YouTube) combine several advantages for the recruiters. The global reach of the Net allows groups to publicise events to more people; and by increasing the possibilities for interactive communication, new opportunities for assisting groups and individuals are offered, along with more chances for contacting them directly. Terrorist recruiters may use interactive online platforms to roam online communities, looking for more ‘promising’ and receptive individuals, using sophisticated profiling procedures. Online recruitment of foreign fighters by terrorist organisations such as the Islamic State (IS) is analysed here as an example of an online multichannel recruitment venue.