Coefficient Giving (formerly Open Philanthropy) is an American philanthropic advising and funding organization. Its current CEO is Alexander Berger.[1]
As of June 2025, Coefficient Giving has directed more than $4 billion[1] in grants across a variety of focus areas, including global health, scientific research, pandemic preparedness, potential risks from advanced AI, and farm animal welfare. It chooses focus areas through a process of "strategic cause selection" — looking for problems that are large, tractable, and neglected relative to their size.[2]
History
While Coefficient Giving works with a range of donors, its founding and most significant ongoing partnership is with Good Ventures, the foundation of Cari Tuna and Dustin Moskovitz.
Former logo of the organization, before it was renamed Coeffcient Giving in 2025.
Dustin Moskovitz co-founded Facebook and later Asana, becoming a billionaire in the process. He and Tuna, his wife, were inspired by Peter Singer's The Life You Can Save,[3] and became the youngest couple to sign Bill Gates and Warren Buffett's Giving Pledge, promising to give away most of their money. Tuna left her journalist position at The Wall Street Journal to focus on philanthropy full-time, and the couple started the Good Ventures foundation in 2011. The organization partnered with GiveWell, a charity evaluator founded by Holden Karnofsky and Elie Hassenfeld. The partnership named itself the "Open Philanthropy Project" in 2014, and began operating independently in 2017.
More recently, Open Philanthropy has launched collaborative funds in partnership with philanthropic donors, including the Lead Exposure Action Fund and the Abundance and Growth Fund.[1] In November 2025, Open Philanthropy was renamed Coefficient Giving, signaling an expansion toward operating multi-donor funds that other philanthropists can join.[1][4][5] Bill Gates has referred to the organization as “a fantastic partner on high-impact giving.”[6]
Grantmaking
In 2024, Coefficient Giving directed over $650 million in grants through recommendations to Good Ventures and other philanthropic partners.[7]
Cause selection
Coefficient Giving selects causes to work on using three criteria:[8]
Importance: How many individuals are affected by the problem, and how deeply.
Neglectedness: Whether the cause receives adequate attention and resources from others, especially other major philanthropists.
Tractability: The likelihood that a philanthropic funder can contribute to significant progress.
If a cause looks promising according to those criteria, Coefficient Giving researchers review literature and meet with experts to get a better understanding of the area, and then conduct an investigation to determine whether there are enough strong giving opportunities to justify the opening of a new program.[9]
Coefficient Giving Chair Cari Tuna speaking at the Stanford Center on Philanthropy and Civil Society's 2025 Philanthropy Innovation Summit
Across the portfolio as a whole, Coefficient Giving aims to equalize marginal returns across different interventions to maximize overall impact.[10]
Impact estimation
Coefficient Giving often uses a quantitative approach to estimate a grant's expected impact — for example, using back-of-the-envelope calculations based on scientific evidence to evaluate projects in areas like vaccine research, farm animal welfare, and the development of techniques for detecting environmental lead.[11]
Hits-based giving
In some cases, Coefficient Giving pursues "high-risk, high-reward" opportunities that don't necessarily have a strong evidence base or a high chance of success, but could potentially become philanthropic "hits" with enormous positive impact. It refers to this approach as "hits-based giving," comparing it to strategies used in venture capital investing.[12]
Examples of philanthropic hits cited by Coefficient Giving include the Green Revolution and the development of oral contraceptives. The organization has itself invested heavily in basic science and other areas with highly uncertain impact — for example, as an early supporter[13] of Nobel Laureate David Baker's work on computational methods for protein design.[14]
Funds
Coefficient Giving's work is split across 13 funds, each of which is focused on a particular area. Each fund pools money from multiple donors and directs it toward what Coefficient Giving believes to be the most promising opportunities in its areas.
Abundance and Growth
In 2025, the organization launched the Abundance and Growth Fund in partnership with Good Ventures, Patrick Collison, and other donors. The fund will dedicate $120 million over three years to accelerate economic growth and boost scientific and technological progress, building on Coefficient Giving's previous work in housing and innovation policy.[15]
Air Quality
Coefficient Giving's support for global public health policy includes work to mitigate lead exposure, reduce air pollution in India and other South Asian countries, which kills roughly 2 million people in the region each year..
Program staff at the Biosecurity and Pandemic Preparedness Fund helped to convene a group of scientists to discuss potential risks from the creation of mirror bacteria.[19] This work was eventually published in Science.[20]
Some have claimed that by "flooding" money into biosecurity, Coefficient Giving is "absorbing much of the field's experienced research capacity, focusing the attention of experts on this narrow, extremely unlikely, aspect of biosecurity risk" (i.e., biological global catastrophic risks).[21]
Effective Giving and Careers
The Effective Giving and Careers Fund aims to "empower people to use their careers and donations to help others as much as possible." It supports organizations that encourage impact-focused career choices and charitable donations.
The Farm Animal Welfare Fund supports to reform cruel practices on factory farms, develop technologies to reduce animal pain and suffering, and support the development and adoption of alternative proteins in hopes of reducing meat consumption.[24]
Coefficient Giving has been called "the world's biggest funder of farm animal welfare."[25]
This fund is dedicated to addressing global catastrophic risks (GCRs) — threats that have the potential to "cause severe or even irreversible harm to humans on a global scale".[35]
While other Coefficient funds focus specifically on risks from AI and biotechnology, this fund supports cross-cutting and foundational work to build capacity for addressing GCRs more generally (e.g. helping people find jobs where they can work full-time on GCR mitigation, or building up related academic fields).
The Global Growth Fund supports work to “accelerate economic growth and reduce poverty in low- and middle-income countries [LMICs].” It explores strategies like increasing export-oriented manufacturing, developing trade links between advanced economies and LMICs, and supporting economics experts who live in LMICs to work as policy advisors.[39]
Global Health & Wellbeing Opportunities
This fund supports “evidence-backed interventions to improve health and wellbeing for people around the world,” including efforts to prevent malaria, promote routine vaccinations, and scale up water chlorination efforts to reduce the spread of waterborne diseases.[40]
In 2024, the organization launched the Lead Exposure Action Fund in collaboration with partners including Good Ventures and the Gates Foundation.[44] The fund has committed $100 million toward reducing lead exposure, approximately doubling the amount of global philanthropic spending on lead reduction.
Coefficient Giving is also a founding member of the Partnership for a Lead-Free Future, a public-private partnership aimed at ending childhood lead poisoning. Other founding members include UNICEF and USAID.[45]
Navigating Transformative AI
The Navigating Transformative AI Fund is a leading supporter of research on AI alignment and other work aimed at reducing existential risk from advanced artificial intelligence. The organization believes that artificial general intelligence could “soon outperform humans in nearly all cognitive domains,” which could have “benefit people enormously” or “pose serious risks from misuse, accidents, loss of control, and other problems.”[46] Ajeya Cotra, a researcher at Coefficient Giving, has said that "a lens that [she uses] to think about the A.I. revolution is that it will play out like the Industrial Revolution but around 10 times faster."[47]
Projects funded by Coefficient Giving's Scientific Research program include efforts to create new vaccines and antivirals, develop new scientific tools and techniques, and fund fellowship programs and conference travel for young scientists.
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