Wait List Zero

Lawrence and Ira Straus Charitable Tr

Arlington, VA

Manifold for Charity Inc

San Francisco, CA

Manifold for Charity funds projects often overlooked by institutional donors, especially in AI safety and governance, effective giving, and other high-impact areas such as animal welfare and catastrophic-risk resilience. In 2024, its 24 grants ranged from $5,110 to $279,583, with a median of about $40,500, and went to recipients in multiple U.S. states, mainly California. The profile describes a public proposal platform but does not explicitly state whether it accepts unsolicited requests.

Effective Ventures Foundation USA Inc

San Francisco, CA

Effective Ventures Foundation USA funds charitable, educational, and scientific projects advancing effective altruism, including work on extreme poverty, animal wellbeing, global priorities, and the long-term future. In 2025, its 48 grants ranged from $5,212 to $2.66 million, with a median of about $92,000; grants went to recipients in multiple U.S. states, and the foundation also reports making foreign grants. The profile does not state whether it accepts unsolicited requests.

Mercatus Center Inc

Arlington, VA

Mercatus Center funds research and education, university teaching, applied economic research, and projects aligned with market-oriented and classical liberal ideas. Its 2025 grants had a median of $25,000, with awards ranging from $7,300 to $1.1 million, and supported recipients across the U.S. and internationally; its Emergent Ventures program accepts applications.

Founders Pledge Inc

New York, NY

Founders Pledge supports research-backed charitable work, including global health and development, education, climate, and global-risk initiatives; its current funding invitation focuses on education and job, entrepreneurship, or agriculture training in low- and middle-income countries. In 2024, grants ranged from $5,250 to $8.925 million, with a median of $77,500. It accepts unsolicited expressions of interest for eligible education and training programs that meet its budget, reach, and impact-evidence criteria.

Rainwater Charitable Foundation

Fort Worth, TX

The Rainwater Charitable Foundation funds education and family economic security, tauopathy and other neurodegenerative-disease research, and initiatives in East Africa, with much of its local support focused on the Fort Worth–Dallas area. Its 2024 grants ranged from $320 to $3.32 million, with a median of $50,000. It gives only to preselected organizations and does not accept unsolicited requests; its Family Economic Security inquiry process is currently paused.