Abstract: Nowadays, dissatisfied consumers increasingly voice their frustration publicly by complaining on brand-created social media sites (e.g. Facebook). This work argues that webcare (i.e., messages sent in response to an online complaint) can mitigate complainants’ unfavorable failure attributions (i.e., locus, controllability, and stability). However, webcare’s ability depends on both prior failure experiences with the same brand and on other consumers’ online comments: Our study of 812 consumers shows that in the case of multiple prior failures, complainants are less sensitive to any kind of marketers’ webcare. In contrast, if complainants have experienced few prior failures, different webcare types vary in their effectiveness. Most importantly, comments of other consumers defending the brand can improve the effectiveness of marketers’ recovery responses. This is only the case when the content of the two responses is congruent. If well-meant advocates’ responses are incongruent to marketers’ complaint handling strategy, unfavorable failure attributions occur. Additionally, our work reveals that webcare’s potential to positively shape complainants’ failure attributions is critical for their post-webcare satisfaction and their inclination to engage in negative word-of-mouth.