Tech to combat sexual assault & harassment

Callisto is a non-profit organization that develops technology to combat sexual assault and harassment.

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The Problem

Sexual assault and harassment are far too common and often never reported. The process of reporting can feel isolating—or worse, retraumatizing. Reporting also comes with its own set of personal and professional risks.

Callisto changes the equation. Our technology empowers survivors, providing options and allowing disclosure in a way that feels safe. Our unique matching system securely connects victims of the same perpetrator to identify repeat offenders.

Learn about what we do

Our Solutions

Callisto Campus provides survivors with trauma-informed options for reporting sexual assault, and is now in place across 13 partner institutions. Callisto is expanding in 2018 to address sexual assault, harassment, and coercion in professional industries.


Callisto Campus

Callisto Campus is designed to detect repeat perpetrators and empower victims to make the reporting decision that feels right for them.

Our flagship online system, Callisto Campus, provides survivors with three options:


Save time-stamped written records of a sexual assault.


Report only if another victim names the same perpetrator.


Report directly to campus administrators, without waiting for a match.


Callisto Expansion

In 2018 we are expanding our reporting platform into professional environments. In this version of Callisto, we are adapting our signature matching system to empower victims beyond college campuses:


Under the Callisto "Matching Escrow," victims input the identity of their perpetrators under the precondition that, if a match is found, a Callisto Options Counselor will reach out to each victim individually.

Options Counseling

A Callisto Options Counselor will advise victims on their choices following a match, including reporting — only if this is the right route for them.

Callisto depends on your philanthropic contributions for our continued success. Donate today and support us as we work to combat sexual assault and harassment across institutions and industries.


Our Impact

  • 5X


    Sexual assault survivors who visited their school’s Callisto Campus website were five times more likely to report their assault than survivors who did not.

  • 15%


    15% of sexual assault survivors who opted into our matching system have been assaulted by the same perpetrator as another survivor in the system.

  • 3X


    On average, survivors using Callisto Campus report almost three times faster than the national average (four months versus 11 months).

Our Supporters

Callisto appreciates our generous community of donors and volunteers who make our work possible.

Our funders include:, Y Combinator, Greylock Partners, The Skoll Foundation, The New York State Health Foundation, The New York Women's Foundation, The Levi Strauss Foundation, NoVo Foundation, The Horace W. Goldsmith Foundation, PIMCO Foundation, Fast Forward, The Harnisch Foundation, and many others.

Over 600 individual donors also contribute to Callisto. Many donors are survivors themselves, or they are allies who share our vision of a world where sexual assault is rare and survivors are supported.

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