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Open Philanthropy Project Fund - InfluenceWatch
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This InfluenceWatch profile provides an external, watchdog-oriented overview of Open Philanthropy/Coefficient Giving, one of the largest funders of AI safety research; useful for understanding the organizational and funding landscape of the AI safety field.
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Summary
InfluenceWatch profile of Coefficient Giving (formerly Open Philanthropy Project Fund), a major grantmaking coalition founded in 2014 by Dustin Moskovitz and Cari Tuna through a partnership with GiveWell and Good Ventures. The organization has distributed nearly $1.2 billion in grants across areas including AI safety, biosecurity, animal welfare, and scientific research. It rebranded to Coefficient Giving in 2025 while maintaining its effective altruism-oriented grantmaking network.
Key Points
- •Founded in 2014 as a partnership between GiveWell and Good Ventures (Dustin Moskovitz/Cari Tuna); spun off as independent nonprofit in 2017 before rebranding as Coefficient Giving in 2025.
- •Nearly all funding comes from Facebook co-founder Dustin Moskovitz and Cari Tuna; combined grants across affiliated orgs total nearly $1.2 billion.
- •Includes a political arm (Open Philanthropy Action Fund) and is deeply connected to the effective altruism movement and EA-aligned grantmaking priorities.
- •Grantmaking expanded in 2017 to cover animal welfare, scientific research, epidemiology, foreign aid policy, and AI safety — making it a major funder in the AI safety ecosystem.
- •InfluenceWatch characterizes it as 'left-of-center,' reflecting its political and philanthropic orientation from a watchdog perspective.
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Coefficient Giving - InfluenceWatch
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Non-profit
Coefficient Giving
Website:
coefficientgiving.org/
Location:
Palo Alto, CA
Type:
Grantmaking coalition
Formation:
2014
Associated Nonprofits:
Silicon Valley Community Foundation
Good Ventures
GiveWell
Open Philanthropy
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Not to be confused with Open Philanthropy (Nonprofit)
Coefficient Giving (formerly known as the Open Philanthropy Project Fund) is a left-of-center grantmaking coalition that was created through a partnership with GiveWell and Good Ventures . In 2017, the coalition expanded by forming an independent nonprofit, Open Philanthropy , while continuing the OPP coalition’s grantmaking initiatives. 1
In 2025, Open Philanthropy announced that it would be rebranding as “Coefficient Giving” to differentiate itself and new grantmaking initiatives from the original grantmaking coalition of the OPP. At the end of 2024, Open Philanthropy co-founder Cari Tuna formed a new nonprofit, Open Philanthropy Advisors , but Coefficient Giving’s announcement of its name change did not acknowledge the new entity nor had it formally announced the end of the original OPP grantmaking coalition as of February 2026. 2
Coefficient Giving is part of the grantmaking network of Facebook co-founder Dustin Moskovitz and his wife Cari Tuna. Nearly all of Open Philanthropy’s funding comes from Moskovitz and Tuna. 3 The group also has a political arm, the Open Philanthropy Action Fund (OPAF). Combined, the three organizations have given almost $1.2 billion in grants since their founding. 4
Background
In 2007, Elie Hassenfeld, Holden Karnofsky, and the other six co-founders are affiliated with the “effective altruism” movement created GiveWell to analyze and evaluate charitable work in the United States. 5 6
In 2011, Dustin Moskovitz and Cari Tuna founded Good Ventures as a grantmaking foundation to give away their fortune throughout their lifetimes. Tuna became the organization’s president and met with many other charitable leaders for advice, including the founders of GiveWell. 3 Following the formation of GiveWell, GiveWell and Good Ventures launched the GiveWell Labs grantmaking initiative. Under the name GiveWell Labs, Good Venutres and GiveWell collaborated on grantmaking initiatives and supported the initiatives by disbursing grants to groups whose
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