Foundation Source Philanthropic Services Inc.

Foundation Source is a leading provider of philanthropic solutions, offering technology, administration, and professional services to empower individuals and companies in their charitable giving. Established in 2000 and headquartered in Fairfield, Connecticut, the company's mission is to help more people become philanthropists and enable them to create a greater impact through their giving.

The company provides a comprehensive suite of services, including administrative support, compliance monitoring, tax and legal expertise, and online foundation management tools. Key offerings include Private Foundation Administration, utilizing their proprietary cloud-based SaaS platform "Impactfully," Donor-Advised Fund (DAF) Administration in partnership with Charityvest, and Planned Giving Services through PG Calc. Foundation Source serves a diverse clientele, including family, corporate, and professionally staffed foundations, as well as donors, nonprofits, professional advisors, and financial institutions.

Joseph Mrak III serves as the CEO, with Sabrina Bailey appointed President in March 2026. Foundation Source was acquired by the private equity firm GTCR in September 2023. The company has expanded its capabilities through strategic acquisitions, including Pacific Foundation Services, Giving Place, Vennfi (which powers Charityvest), and PG Calc in 2025. Recognized for its innovation, Foundation Source was named to Fast Company's 2026 List of the World's Most Innovative Companies. As of December 31, 2025, Foundation Source supports over 5,600 private foundations, 20,000 DAF accounts, and 1,700 nonprofits, administering more than $55 billion in charitable assets.