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185 organizations · 686 published requirements · 1136 sources Independent: no organization pays for its ranking or its eligibility analysis Every figure carries its source and the date it was verified

Comparison · 16 material differences

Institute for Private Investors vs Solidaire Network

This comparison was generated on request from the records. It carries no editorial verdict and is not indexed. The published comparisons are listed on the compare page.

Read down each column for one organization, across a row for the difference. A bronze mark at the left of a cell means the organizations differ on that row. A dash or “not published” means the organization does not disclose the fact; it is not a zero.

Verified September 2026
Family-office network

Institute for Private Investors

Ultra-high-net-worth principals, families of substantial wealth, family office executives and private investors in North America

Verified September 2026
Philanthropic network

Solidaire Network

Individual wealth holders able to move $50,000 or more a year in giving, and professional staff and trustees at grantmaking foundations, who want to direct money toward…

What the records say

Side by side

Institute for Private InvestorsSolidaire Network
Profile
Type Family-office network Philanthropic network
Founded 1991 (Sources disagree. Wikipedia gives 1991 (formally incorporated 1997) and Campden Wealth says IPI has "roots dating to 1991"; the IPI homepage says 1995 and the IPI membership overview says 1992. Recorded as 1991 as the earliest and most corroborated date.) 2012 (Sources differ. Wikipedia's article on co-founder Leah Hunt-Hendrix dates the network's founding to 2012; Solidaire's own site says it has been embedded in justice movements "for a decade" and its published timeline begins in 2015. Solidaire Network Inc received its own IRS tax exemption only in May 2020, having previously operated under fiscal sponsorship, so the incorporation date and the founding date are different things.)
Headquarters New York, United States Oakland, United States
Geographic footprint Members in more than 30 countries and 41 US states; events across the US, Europe, Asia and India United States, organised through regional hubs rather than formal chapters; the 2024 network gathering was held in Atlanta
Members 1,000as of September 2026 Not publicly disclosed: Solidaire publishes no member count. It does state that about 40 per cent of members work as professionals at foundations.
Chapters No geographic chapters; regional and local workshops instead. Solidaire has regional hubs rather than chapters, and does not publish how many.
Primary audience Ultra-high-net-worth principals, families of substantial wealth, family office executives and private investors in North America Individual wealth holders able to move $50,000 or more a year in giving, and professional staff and trustees at grantmaking foundations, who want to direct money toward left-of-centre social justice organising
Typical member IPI states a minimum of USD 30 million in assets to qualify and reports that members' average liquid holdings exceed USD 300 million. More than 48 per cent of members have belonged for ten years or longer. Individual members are people with wealth who can generally move $50,000 or more in annual giving, whether personally or through a family foundation, donor-advised fund or family office, and who are aligned with Solidaire's stated values. Institutional members are foundation professionals: Solidaire says about 40 per cent of its membership works at foundations of all sizes. The joining form also names donor advisors, money coaches, current and prospective foundation trustees and philanthropy-serving organisation staff as relevant categories.
Qualification
Role or title Applicant must be an ultra-high-net-worth principal, a member of a family of substantial wealth, a family office executive or a private investorverified September 2026 · source ↗ No published role or title
Minimum investable assets Minimum of USD 30 million in assetsStated on the IPI membership page. IPI reports that members' average liquid assets exceed USD 300 million, well above the floor.verified September 2026 · source ↗ No published minimum investable assets
Geographic restriction No published geographic restriction United StatesOrganised through regional hubs; the annual network gathering is held in person in a US city.verified September 2026 · source ↗
Invitation required Sometimes No
Sponsor required Not documented Not documented
Application process Candidates who meet the USD 30 million asset minimum apply through IPI's membership application portal and choose an individual or family membership. All applications are subject to approval. Members of IPI are automatically treated as qualified for Campden Club events and do not complete Campden's separate qualification form. Prospective members complete an interest form on the membership page, indicating which categories apply to them and how they heard about Solidaire. The donor organising and philanthropic transformation teams then follow up. Separate individual and institutional membership documents are linked from the page. New members receive an orientation packet. Solidarity Circles are joined by separate application.
Selectivity Not publicly disclosed. IPI states only that all applications are subject to approval. Not publicly disclosed: no acceptance rate or review process is published. The effective filters are the $50,000 giving-capacity expectation and alignment with Solidaire's stated political principles.
Cost
Annual dues Not publicly disclosed. IPI publishes no dues; secondary guides give incompatible estimates (roughly US$7,500-20,000 and roughly US$15,000-25,000) that could not be independently verified.verified September 2026 · source ↗ Not publicly disclosed: the membership page states the criteria but routes fee details into separate individual and institutional membership documents hosted off-site, and no figure appears on the site itself.verified September 2026 · source ↗
Initiation fee Not publicly disclosed Not publicly disclosedverified September 2026
Event costs Not publicly disclosed Not publicly disclosed: the annual network gathering's cost is not published.verified September 2026
Membership term Annual Not documented
Structure
Meeting frequency Regional and local workshops, social events and co-investment roundtables through the year Biweekly virtual member meetings (Beloved Fridays), Solidarity Circles meeting on their own schedules, regional hub gatherings in person and online, drop-in philanthropic transformation caucuses, and one in-person network gathering a year
Peer forums Peer-to-peer workshops and roundtables plus the Memberlink online community; no fixed confidential forum groups published Solidarity Circles (member-driven groups formed around a topic, meeting on their own schedule for a duration the group sets) plus regional hubs and identity- or role-based philanthropic transformation caucuses. Members also run a rapid-response giving listserv for member-led resource mobilisations.
Confidentiality Professional members such as advisers and wealth managers are restricted from direct access to investor members Not publicly disclosed
Time commitment Not documented Not documented
Organized as Event-focused, Virtual, Forum-based Event-focused, Virtual, Chapter-based, Forum-based
Confidential peer forums Yes Yes
Local chapters No Yes
Virtual membership Not documented Yes
Online community Yes Yes
Member directory Yes Partial
Events Yes Yes
Programming
Educational programming Yes Yes
Leadership development Partial Yes
Retreats Not documented Yes
Travel Yes No
Family programming Yes Partial
Spouse and partner programming Yes Not documented
Next-generation programming Yes Partial
Investment discussions Yes Partial
Investment opportunities Yes No
Philanthropic component Not documented Yes
Networking emphasis High High
Social emphasis Medium Medium
Every value comes from the same records as the individual pages; a dash means the fact is not published or verifiable. Rows are grouped by what a reader decides on, not by data type.

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Sources

Drawn from the sources listed on each page: Institute for Private Investors · Solidaire Network