Empathy, knowing, feeling and responding to the way another person feels, is so essential in some online communities that they can be described aptly as ‘empathic communities’. This paper discusses a review of 100 online communities. The aim of this review is to examine whether the existence of empathic communities is widespread and to compare these communities with a range of other online communities, whose focus includes religion, sports, pets, culture, science, etc. The results of our analysis suggest that empathic communities develop when patient support or emotional support topics are the focus of interest.