Foundation Source Philanthropic Services:
A Leading Provider of Technology-Led Charitable Giving Solutions ("PhilTech")
Recently Released!!!
Date Published: May 22, 2025
Summary PowerPoint Deck: 132 Slides
Reference PowerPoint Deck: 211 Slides
Foundation Source Philanthropic Services was founded as Charity Planner by Avi Greenbaum & Neil Greenbaum in 2001. The firm is based in Fairfield, CT. Foundation Source Philanthropic Services has four offices, 302 employees, and 4,000 foundation, endowment, & financial institutions clients. Foundation Source Philanthropic Services is led by its CEO Joe Mrak & Chief Operating Officer Estee Shor. Foundation Source Philanthropic Services is privately owned. Its websites can be found at www.foundationsource.com, www.charityvest.org, & www.pgcalc.com.
This research addresses the key historical phases of Foundation Source Philanthropic Services, including:
- Charity Planner & Entrepreneurial Phase
- Incline Equity Partners Phase
- GTCR & Business Expansion Phase
Its profile includes the key statistics of the company, including its number of offices, employees, & financial institution clients.
Its profile includes detailed outlines of its core business, including:
- Foundation Source
- Charityvest
- PG Calc
And its profile concludes with the highlights of its organizational structure & ownership.
Disclosure:
Tiburon's Managing Partner is a member of Foundation Source Philanthropic Services' board of directors.

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