Hollaback! is an international movement to end street harassment of women and LGBTQ individuals. We are powered by a global activist network that stretches from New York City to Santiago, and from London to Mumbai. Our local activists use mobile and web-based technology to gather data on where, when, and how sexual harassment is taking place in public space. We work together on a global scale to ignite a public conversation surrounding street harassment and to create strategies that will ensure equal access to public space for all.