Over Zero is a left-of-center advocacy organization against supposed “dangerous speech.” It is a project of the Hopewell Fund, a funding and fiscal sponsorship nonprofit managed by the Washington, D.C.-based consultancy Arabella Advisors.
The organization states that when societies become divided along religious, ethnic and political lines violence, discrimination and mass atrocities can happen.  To do this, the group ways it must “undermine factors (such as dangerous speech) that increase division.” 
The group provides training and resources for civil society organizations. It also researches practices for reducing conflict based on identity. 
The organization provides resources to “incubate new initiatives” in specific communities. The group also convenes people from academia, civil society, and public policy. The organization suggests communication is used to “drive division, tap into and mobilize powerful emotions like fear and disgust, shape social norms and pressures, and coordinate action.” 
Rachel Brown has been the executive director of Over Zero since June 2017. Brown previously spent four years as director of Sisi ni Amani International. In 2016, she was a conflict sensitivity advisor for the World Bank. She was also a fellow at the Center for Genocide Prevention at the U.S. Holocaust Memorial Museum from 2014 to 2015. 
Samantha Owens is the U.S. regional director for Over Zero based in Washington. She started with the organization in June 2018. Owens previously worked as programming and external relations manager at the Post Conflict Research Center. 
The Democracy Fund, the left-leaning foundation of eBay founder Pierre Omidyar, made a $150,000 grant to the group in 2017 and a $200,000 grant in 2019, asserting the group is combatting “growing prevalence of nativist and xenophobic movements targeting Muslims, refugees, immigrants, and minority groups.” Parroting one Over Zero line, the Democracy Fund wrote, “dangerous speech devolves political debate.” Over Zero used the Democracy Fund grant to partner with local groups to provide trainings. 
The Hopewell Fund, Over Zero’s parent organization, manages several left-of-center single-issue advocacy groups, including the Economic Security Project and pro-Obamacare Get America Covered. The Hopewell Fund often operates alongside its “sister” nonprofits, primarily the 501(c)(4) Sixteen Thirty Fund and 501(c)(3) New Venture Fund, which both provide similar funding and fiscal sponsorship services to left-progressive advocacy organizations. All three funds are administered by Arabella Advisors, a Washington, D.C.-based philanthropic consulting firm that caters to left-leaning clients. The Windward Fund, another 501(c)(3) nonprofit, is also managed by Arabella Advisors and performs similar functions.