Company lists · Data refreshed September 2026

Top 21 Nonprofit consultants based in St. Louis, United States

RevenueBase identified 48 nonprofit consultants headquartered in St. Louis, United States as of September 2026 and tracks 725 professional contacts across them, including 65 with verified work emails. New York is the largest hub.

This list covers nonprofit consultants headquartered in St. Louis, 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
48Companies
725Contacts tracked
65Verified emails
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The 21 largest nonprofit consultants based in St. Louis, United States

Ranked by team size
Top 21 of 48 nonprofit consultants based in St. Louis, United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names nonprofit consultants: 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
REM And CompanyIndirect evidence
St. Louis, United StatesHQ checked Sep 5, 2026201-500577

“49% of Businesses fail within their first 5 years.”

Source: company website · checked Sep 5, 2026
2
Zielinski CompaniesPartial evidence
St. Louis, MO, United StatesHQ checked Sep 5, 202611-5015

“Since 1957 Zielinski Companies has helped religious and nonprofit organizations address their financial, planning, and fundraising needs.”

Source: company website · checked Sep 5, 2026
3
Mission Matters GroupIndirect evidence
St. Louis, MO, United StatesHQ checked Sep 5, 202611-5013

“Mission Matters Group was founded in 2011 for one purpose – to help our clients harness the power of technology in support of their unique mission.”

Source: company website · checked Sep 5, 2026
4
KP Consulting GroupIndirect evidence
St. Louis, MO, United StatesHQ checked Sep 5, 20261-1012

“KP Consulting is a consortium of trusted professionals with decades of experience in communication strategy, creative marketing tactics and specialized implementation throughout a…”

Source: company website · checked Sep 5, 2026
5
Nmbl StrategiesPartial evidence
St. Louis, MO, United StatesHQ checked Sep 5, 20261-107

“NMBL Strategies seeks to empower small businesses, nonprofits and public-private enterprises through trusted consulting partnerships.”

Source: company website · checked Sep 5, 2026
6
Holmes, Radford & ReynoldsIndirect evidence
St. Louis, MO, United StatesHQ checked Sep 5, 20261-105

“A leader in the field of philanthropy, Holmes, Radford & Reynolds has the competencies and experience to deliver the results you need to move forward.”

Source: company website · checked Sep 5, 2026
7
Gladiator ConsultingIndirect evidence
St. Louis, MO, United StatesHQ checked Sep 5, 20261-105

“Since our inception, Gladiator Consulting set out to be a different type of partner.”

Source: company website · checked Sep 5, 2026
8St. Louis, MO, United StatesHQ checked Sep 5, 20261-104

“Michael D.”

Source: company website · checked Sep 5, 2026
9
Dewey Impact GroupIndirect evidence
St. Louis, MO, United StatesHQ checked Sep 5, 20261-103

“At the Dewey Impact Group, we understand that every cultural and educational organization is unique, with its own vision, challenges, and opportunities.”

Source: company website · checked Sep 5, 2026
10
Tate Consults, LLCPartial evidence
St. Louis, MO, United StatesHQ checked Sep 5, 202611-503

“Tate Consults provides nonprofit consulting and professional development, focusing on fund strategies and executive coaching for building healthy, high performing boards and staff…”

Source: company website · checked Sep 5, 2026
11
Savi Gurus LLCIndirect evidence
St. Louis, MO, United StatesHQ checked Sep 5, 20261-103

“Sometimes problems linger because “we’ve always done it this way.” Sometimes problems go unsolved because it's too daunting, “If we start, we can’t finish it.” Savi Gs can solve…”

Source: company website · checked Sep 5, 2026
12St. Louis, MO, United StatesHQ checked Sep 5, 20261-102

“Is it even possible for nonprofits to earn transformation-level support without a capital campaign, rebrand, or marketing push?”

Source: company website · checked Sep 5, 2026
13
D. Advocate & AssociatesIndirect evidence
St. Louis, MO, United StatesHQ checked Sep 5, 20261-102

“At Advocate we believe in the following core principles: Business isn’t complicated.”

Source: company website · checked Sep 5, 2026
14St. Louis, MO, United StatesHQ checked Sep 5, 20261-102

“Peak Organization Performance will help you surmount your company's peaks with the Sherpa Services you need to optimize your organization’s short-and long-term performance.”

Source: company website · checked Sep 5, 2026
15
KBL Impact PartnersPartial evidence
St. Louis, MO, United StatesHQ checked Sep 5, 20261-102

“At KBL Impact Partners, we help nonprofit leaders scale their impact, increase funding, and build long-term sustainability through proven strategies, coaching, and consulting.”

Source: company website · checked Sep 5, 2026
16
Blackrock Consulting LLCIndirect evidence
St. Louis, MO, United StatesHQ checked Sep 5, 20261-102

“Blackrock Consulting is a local, majority-woman owned business with expertise ranging from government relations and public policy to environmental sustainability and community…”

Source: company website · checked Sep 5, 2026
17
MBL VenturesPartial evidence
St. Louis, MO, United StatesHQ checked Sep 5, 20261-101

“MBL Ventures provides management consulting services for businesses, nonprofits, and public sector organizations navigating strategy, structure, and government.”

Source: company website · checked Sep 5, 2026
18St. Louis, MO, United StatesHQ checked Sep 5, 20261-101

“Change management consultant for governments, public agencies, non-profits, and companies.”

Source: company website · checked Sep 5, 2026
19
Anavo StrategiesIndirect evidence
St. Louis, MO, United StatesHQ checked Sep 5, 20261-101

“Welcome to Anavo Strategies – Where Vision Meets Action for Lasting Impact.”

Source: company website · checked Sep 5, 2026
20
Kampen Consultants, LLCIndirect evidence
St. Louis, MO, United StatesHQ checked Sep 5, 20261-101

“Our firm was founded in 1988 to meet the needs of small business owners - greater efficiency, greater effectiveness, and real results.”

Source: company website · checked Sep 5, 2026
21
3rd Culture ConsultingPartial evidence
St. Louis, MO, United StatesHQ checked Sep 5, 20261-101

“3rd Culture Consulting provides results-driven solutions to its clients in the areas of nonprofit administration, millennial coaching, and fundraising.”

Source: company website · checked Sep 5, 2026

Showing 21 of 48 nonprofit consultants based in St. Louis, United States

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Nonprofit consultants based in St. Louis, United States at a glance

As of Sep 5, 2026
1-10Median size (employees)
New YorkLargest hub · 500 HQs
Contacts with mobile numbers
Sep 5, 2026Data refreshed

Companies by employee count

1-10
40
11-50
7
201-500
1

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 St. Louis, over 48 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 nonprofit consultants, 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 St. Louis, United States whose own description of what they do matches “nonprofit consultants”. 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 nonprofit consultants, and records with no verified work email. Companies headquartered outside St. Louis 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, 65 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.

Nonprofit consultants by metro in the United States

Frequently asked

How many nonprofit consultants are there based in St. Louis, United States?

RevenueBase identified 48 nonprofit consultants headquartered in St. Louis, 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?

REM And Company, headquartered in St. Louis, tops this list with the largest team on record.

Which city has the most nonprofit consultants?

New York leads with 500 headquartered companies, followed by Washington (443) and Chicago (351).

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 65 verified decision-maker contacts tracked across these 48 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.