This entry outlines the ways in which feminist activists have responded to gendered abuse online. Online abuse is disproportionately targeted toward women and is characterized as particularly gendered as it targets their gender, appearance, and sexuality. This abuse can take the form of trolling, hate speech, rape and death threats, and image‐based sexual abuse. As the internet provided a space for online abuse it simultaneously created a platform for feminist activists to challenge this abuse. This entry outlines the variety of digital feminist activism which allows for women to document and share their experiences of abuse and to draw attention to the problem. The type of digital activism varies throughout the world and often draws attention to offline issues of rape, sexual abuse, and sexual assault. Through a number of examples of famous hashtags, it is shown how hashtag activism enables women to draw attention to a specific issue and discuss this collectively under a hashtag. A more individualist approach to digital feminist activism is that of digital vigilantism, or digilantism, in which individual women call out, shame, and ridicule online abusers and men's rights activists—often using humor as a means of communication. Finally, digital feminist activism functions as a counter‐narrative to mainstream media discourse and the entry discusses the potential for social change for the various strategies of digital feminist activism.