Company lists · Data refreshed September 2026

Top 25 Philanthropic consulting firms based in Boston, United States

RevenueBase identified 70 philanthropic consulting firms headquartered in Boston, United States as of September 2026 and tracks 1,856 professional contacts across them, including 818 with verified work emails. New York is the largest hub.

This list covers philanthropic consulting firms headquartered in Boston, United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, how directly it supports the match, and when it was last checked. Data refreshed September 5, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review
70Companies
1,856Contacts tracked
818Verified emails
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The 25 largest philanthropic consulting firms based in Boston, United States

Ranked by team size
Top 25 of 70 philanthropic consulting firms based in Boston, United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names philanthropic consulting firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#CompanyHeadquartersEmployeesContacts
1
FSGPartial evidence
Boston, MA, United StatesHQ checked Sep 5, 202651-200517

“At FSG, we are a global nonprofit consulting firm committed to advancing equitable systems change.”

Source: company website · checked Sep 5, 2026
2
The Bridgespan GroupIndirect evidence
Boston, MA, United StatesHQ checked Sep 5, 2026201-500443

“The Bridgespan Group is a global nonprofit that strives to make the world more equitable and just.”

Source: company website · checked Sep 5, 2026
3
Isaacson, MillerIndirect evidence
Boston, MA, United StatesHQ checked Sep 5, 2026201-500250

“Isaacson, Miller is one of the nation's premier executive search firms serving organizations that advance the public good.”

Source: company website · checked Sep 5, 2026
4
Empower Success CorpsIndirect evidence
Boston, MA, United StatesHQ checked Sep 5, 202651-20074

“At ESC, our mission is to empower nonprofits to achieve their goals & contribute to a more just and equitable world.”

Source: company website · checked Sep 5, 2026
5Boston, MA, United StatesHQ checked Sep 5, 2026n/a37

“SOAR strengthens nonprofits through collaborative, pro bono consulting that builds organizational capacity and deepens community impact while fostering an enriching learning…”

Source: company website · checked Sep 5, 2026
6Boston, MA, United StatesHQ checked Sep 5, 202611-5033

“The Philanthropic Initiative (TPI) helps companies, foundations, families and individuals find innovative ways to maximize the impact of their giving.”

Source: company website · checked Sep 5, 2026
7
The More Than Giving COIndirect evidence
Boston, MA, United StatesHQ checked Sep 5, 2026n/a31

“We give nonprofits with visionary leaders and compelling missions an affordable, on-demand staffing solution to supplement the bandwidth and skillsets of their volunteer force.”

Source: company website · checked Sep 5, 2026
8
GMA FoundationsPartial evidence
Boston, MA, United StatesHQ checked Sep 5, 202611-5028

“GMA Foundations helps you define a clear path to transformative philanthropy, and then walks the path with you as an ally and a guide.”

Source: company website · checked Sep 5, 2026
9
Acumen Financial AdvantageIndirect evidence
Boston, MA, United StatesHQ checked Sep 5, 202611-5027

“Acumen Financial Advantage is the financial performance partner of choice for mission-driven organizations specializing in optimizing programs that attract and retain top talent…”

Source: company website · checked Sep 5, 2026
10Boston, MA, United StatesHQ checked Sep 5, 202611-5027

“TDC is a nonprofit management consulting and research firm that works across the nonprofit sector.”

Source: company website · checked Sep 5, 2026
11
Development Guild DDIIndirect evidence
Boston, MA, United StatesHQ checked Sep 5, 202611-5025

“We partner with nonprofit leaders to drive their missions forward with fresh perspectives and high-impact solutions through our 45+ years of experience in strategy, fundraising…”

Source: company website · checked Sep 5, 2026
12
Inspire INCPartial evidence
Boston, MA, United StatesHQ checked Sep 5, 2026201-50022

“Founded in 1998, Inspire is a 501(c)(3) nonprofit offering management and strategy consulting services to leading nonprofit organizations across the United States.”

Source: company website · checked Sep 5, 2026
13Boston, MA, United StatesHQ checked Sep 5, 20261-1020

“Invest in Others was founded by the financial services industry to amplify the charitable work of financial advisors and the institutions they work for.”

Source: company website · checked Sep 5, 2026
14
Wingspan Legacy PartnersIndirect evidence
Boston, MA, United StatesHQ checked Sep 5, 202611-5013

“Wingspan Legacy Partners, founded by Christina Wing, is a family business and family office advisory practice, providing global families, founders, and rising leaders with ongoing…”

Source: company website · checked Sep 5, 2026
15Boston, MA, United StatesHQ checked Sep 5, 202651-20013

“We are seasoned professionals within the consulting field and former C-Suite executives who know what it takes to get the job done efficiently and on-time.”

Source: company website · checked Sep 5, 2026
16
Page Consulting LLCIndirect evidence
Boston, MA, United StatesHQ checked Sep 5, 20261-108

“We partner with small and medium-sized nonprofits to build their capacity for fundraising success by strengthening their fundraising infrastructure, helping cultivate their unique…”

Source: company website · checked Sep 5, 2026
17
Mott Philanthropic LLCIndirect evidence
Boston, MA, United StatesHQ checked Sep 5, 202611-508
Source: company website · checked Sep 5, 2026
18
Data Soul ResearchPartial evidence
Boston, MA, United StatesHQ checked Sep 5, 20261-108

“Data+Soul Research is a consulting firm that specializes in design, strategy, and evaluation for social impact.”

Source: company website · checked Sep 5, 2026
19
The Numad GroupPartial evidence
Boston, MA, United StatesHQ checked Sep 5, 20261-107

“The Numad Group is communication, fundraising, strategic planning, and program evaluation consulting firm that primarily partners with nonprofits in the arts, education, and…”

Source: company website · checked Sep 5, 2026
20
The Venti Group, LLCPartial evidence
Boston, MA, United StatesHQ checked Sep 5, 20261-106

“Through a unique 100% focus on philanthropic operation services, The Venti Group will innovate and optimize your fundraising operations.”

Source: company website · checked Sep 5, 2026
21Boston, MA, United StatesHQ checked Sep 5, 20261-106

“Nubian Square Investment Advisors is an independent wealth management and investment consulting firm based in Massachusetts.”

Source: company website · checked Sep 5, 2026
22
Sarah J ConsultingIndirect evidence
Boston, United StatesHQ checked Sep 5, 20261-105

“Development leaders: Whether you're tasked with raising $1M or $100M, the stakes are super high.”

Source: company website · checked Sep 5, 2026
23
Copley Raff INCIndirect evidence
Boston, MA, United StatesHQ checked Sep 5, 20261-104

“Copley Raff is a U.S.”

Source: company website · checked Sep 5, 2026
24
Spencer Brenneman, LLCIndirect evidence
Boston, MA, United StatesHQ checked Sep 5, 20261-104

“We help mission-driven organizations reframe their focus and remaster their message so that they can thrive in any environment.”

Source: company website · checked Sep 5, 2026
25
The Allen Company LLCIndirect evidence
Boston, MA, United StatesHQ checked Sep 5, 20261-104

“To companies needing business development, political organizations needing an assist with communications, fundraising, or strategy, schools looking to reach the next level, or any…”

Source: company website · checked Sep 5, 2026

Showing 25 of 70 philanthropic consulting firms based in Boston, United States

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Philanthropic consulting firms based in Boston, United States at a glance

As of Sep 5, 2026
1-10Median size (employees)
New YorkLargest hub · 226 HQs
Contacts with mobile numbers
Sep 5, 2026Data refreshed

Companies by employee count

1-10
49
11-50
12
51-200
6
201-500
3

Email recency for this list is measured across the whole United States list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for Boston, over 70 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among philanthropic consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence rating on every row are there so you can check each match yourself.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Companies headquartered in Boston, United States whose own description of what they do matches “philanthropic consulting firms”. Matching reads each company's description, not its industry code or its name.
What we exclude
Companies whose own description does not clearly place them among philanthropic consulting firms, and records with no verified work email. Companies headquartered outside Boston are excluded even when they keep an office there.
Match quality
In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and an evidence rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every listed company carries at least one verified work email, 818 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on September 5, 2026. Lists refresh periodically as the graph is re-checked.
Corrections
Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

How many philanthropic consulting firms are there based in Boston, United States?

RevenueBase identified 70 philanthropic consulting firms headquartered in Boston, United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

FSG, headquartered in Boston, tops this list with the largest team on record.

Which city has the most philanthropic consulting firms?

New York leads with 226 headquartered companies, followed by Washington (175) and Chicago (149).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 818 verified decision-maker contacts tracked across these 70 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 5, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.