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Callisto's Overview

Total employees33
HeadquartersOakland
Founded2011

Callisto is a non-profit organization that leverages technology to combat sexual assault and support survivors. They create tools that allow individuals to securely and confidentially document their experiences, understand their reporting options, and, if they choose, connect with others who may have been assaulted by the same perpetrator. Their primary focus is on empowering survivors by giving them control over their information and decisions, aiming to increase reporting rates and identify repeat offenders, particularly within college campuses and professional organizations.

Where is Callisto's Headquarters?

HQ Function

Administrative hub, strategic planning, and operational coordination for a distributed team. Serves as the official registered address.

Notable Features:

The listed address is part of a modern office complex, likely serving as a registered agent or flexible office space rather than a large, traditional corporate headquarters, reflecting their agile and potentially remote-first operational model.

Work Culture:

As a mission-driven non-profit focused on sensitive issues, Callisto's work culture likely emphasizes empathy, collaboration, innovation, and a strong commitment to survivor-centric principles. Team members are passionate about social impact and leveraging technology for good.

HQ Significance:

The administrative base in California places Callisto within a major tech and social innovation ecosystem, facilitating partnerships and access to talent. However, its impact is national through its digital platform.

Values Reflected in HQ: The choice of a flexible or registered office space over a large physical footprint may reflect values of resource efficiency, adaptability, and prioritizing investment in their programs and technology over extensive physical infrastructure.

Location:

Callisto's platform and services are primarily focused on institutions within the United States, particularly colleges, universities, and some professional organizations. While their digital tools can technically be accessed globally, their direct partnerships and support systems are currently U.S.-centric. Their impact is through the adoption of their technology by these partner institutions.

Street Address:

1 Kaiser Plaza, Suite 300

City:

Oakland

State/Province:

CA

Country:

USA

Callisto's Global Presence

Remote / Distributed

Address: N/A

Supports all organizational functions, including software development, program management, partnerships, and advocacy, without restriction to a single geographic office.

Buying Intent Signals for Callisto

Highperformr Signals uncover buying intent and give you clear insights to target the right accounts at the right time — helping your sales, marketing, and GTM teams close more deals, faster.

Notable news
Hiring actively
Corporate Finance
Corporate Finance
Corporate Finance
Corporate Finance
Corporate Finance
*Example signal, not calculated in real time

Executive Team of Callisto

As of April 2025, Callisto' leadership includes:

Amanda Stuart - Interim Chief Executive Officer
Sophia Lanza-Weil - Director of Product
Ryan Reft - Director of Engineering
Jazminahili Zamora - Director of Programs & Partnerships

Investors of Callisto

Callisto has been backed by several prominent investors over the years, including:

Google.org
The Skoll Foundation
Knight Foundation
The Ford Foundation
Omidyar Network (Pierre Omidyar)
Reid Hoffman
Activation Fund
Wellspring Philanthropic Fund
Lyda Hill Philanthropies

Executive New Hires/Exits in the Last 12 Months

Hire1
Exits1

The most significant recent executive change was the transition of founder Jessica Ladd from CEO, with Amanda Stuart stepping in as Interim CEO. This change occurred in late 2022/early 2023.

Departures

Jessica Ladd, Jessica Ladd transitioned from her role as CEO, continuing as a board member.

New Appointments:

Amanda Stuart, Amanda Stuart appointed as Interim CEO.

Technology (Tech Stack) used by Callisto

Discover the tools Callisto uses. Highperformr reveals the technologies powering your target accounts — helping your sales, marketing, and GTM teams prioritize smarter and close faster.

Callisto Email Formats and Examples

Common email formats for non-profit organizations like Callisto often use the first name or first initial and last name. Based on common patterns, the likely format is [first]@projectcallisto.org or [first].[last]@projectcallisto.org.

[first]@projectcallisto.org or [first_initial][last]@projectcallisto.org

Format

amanda@projectcallisto.org

Example

75%

Success rate

News and media

Philanthropy WomenOctober 26, 2023

Callisto mentioned as a key resource in sexual assault prevention

Article discusses funding and resources for sexual assault prevention, highlighting organizations like Callisto that provide innovative solutions and support for survivors....more

Callisto Blog / AnnouncementDecember 14, 2022

Callisto Announces Leadership Transition: Founder Jessica Ladd to Step Down as CEO, COO Amanda Stuart Appointed Interim CEO

Callisto announced that founder Jessica Ladd would be stepping down from her role as CEO. Amanda Stuart, then COO, was appointed as Interim CEO to lead the organization forward....more

Google.orgApril 7, 2022

Google.org highlights support for Callisto

Google.org detailed its support for organizations working to help survivors of sexual assault, featuring Callisto as a recipient of funding and a partner in developing tech solutions for justice and healing....more

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