Social entrepreneurs
Callisto: Revolutionizing sexual assault reporting on campus and beyond

An estimated 90% of sexual assaults on college campuses in the United States are committed by repeat perpetrators. Less than 10% of the one in five women who are sexually assaulted ultimately report it [1]. Jess Ladd, the founder of Callisto and an infectious disease epidemiologist by training, did the math: 59% of sexual assault cases could be prevented just by identifying repeat offenders.

Ladd describes Callisto as “the online reporting system that sexual assault survivors want.” Callisto’s mission is to create one website for survivors of sexual assault or coercion that can detect any serial sexual predator in the United States. Callisto aims to create a reporting process that prioritizes survivors’ needs, rebuilds their sense of agency, and empowers survivors to understand their range of options.

Callisto is changing the equation with their unprecedented matching system. Users who experience sexual assault can choose to: report the incident electronically, hold a private record of their incident for later reporting, or enter into the matching system to be reported to authorities if another survivor names the same assailant. With the ability to record their assailant's information, survivors are protecting their communities while simultaneously extending their options for action by giving them the added confidence and credibility to report the incident.

Currently available on 13 college campuses to over 162,000 students, Callisto has grown their reach in higher-education and has expanded to support survivors of sexual assault and harassment in professional industries with Callisto Expansion. Based on the same system, it allows people who have been victims of sexual assault in the workplace to securely and anonymously report and record it.


[1] Callisto

Start date:
June 2018
End date:
February 2020