Company lists · Data refreshed September 2026

Top 10 Nonprofit consulting providers based in St. Louis, United States

Name: Nonprofit consulting providers based in St. Louis, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 14, 2026 25 companies tracked

RevenueBase identified 25 company matches for nonprofit consulting providers associated with St. Louis, United States as of September 2026 and tracks 93 professional contacts across them, including 37 with verified work emails. Across the United States, New York is the largest hub for this category (307 companies); St. Louis has 25.

This list covers company matches for nonprofit consulting providers associated with St. Louis, United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 14, 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 RevenueBase SmartSearch · Exact Recorded Sep 14, 2026 How this list was built

25Companies

93Contacts tracked

37Verified emails

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The 10 largest nonprofit consulting providers based in St. Louis, United States

Ranked by team size

Top 10 of 25 company matches for nonprofit consulting providers based in St. Louis, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 14, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Zielinski Companies	Exact match	St. Louis, MO, United StatesHQ recorded Sep 14, 2026	11-50	15 contacts →
	Exact match “Since 1957 Zielinski Companies has helped religious and nonprofit organizations address their financial, planning, and fundraising needs.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
2	Mission Matters Group	Exact match	St. Louis, MO, United StatesHQ recorded Sep 14, 2026	11-50	13 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
3	Nmbl Strategies	Exact match	St. Louis, MO, United StatesHQ recorded Sep 14, 2026	1-10	7 contacts →
	Exact match “NMBL Strategies seeks to empower small businesses, nonprofits and public-private enterprises through trusted consulting partnerships.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
4	Holmes, Radford & Reynolds	Exact match	St. Louis, MO, United StatesHQ recorded Sep 14, 2026	1-10	5 contacts →
	Exact match “A leader in the field of philanthropy, Holmes, Radford & Reynolds has the competencies and experience to deliver the results you need to move forward.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
5	Michael D. Rubin & Associates	Exact match	St. Louis, MO, United StatesHQ recorded Sep 14, 2026	1-10	4 contacts →
	Exact match “Michael D.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
6	Tate Consults, LLC	Exact match	St. Louis, MO, United StatesHQ recorded Sep 14, 2026	11-50	3 contacts →
	Exact match “Tate Consults provides nonprofit consulting and professional development, focusing on fund strategies and executive coaching for building healthy, high performing boards and staff…” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
7	Relevant Thread Consulting LLC	Exact match	St. Louis, MO, United StatesHQ recorded Sep 14, 2026	1-10	2 contacts →
	Exact match “Is it even possible for nonprofits to earn transformation-level support without a capital campaign, rebrand, or marketing push?” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
8	KBL Impact Partners	Exact match	St. Louis, MO, United StatesHQ recorded Sep 14, 2026	1-10	2 contacts →
	Exact match “At KBL Impact Partners, we help nonprofit leaders scale their impact, increase funding, and build long-term sustainability through proven strategies, coaching, and consulting.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
9	3rd Culture Consulting	Exact match	St. Louis, MO, United StatesHQ recorded Sep 14, 2026	1-10	1 contacts →
	Exact match “3rd Culture Consulting provides results-driven solutions to its clients in the areas of nonprofit administration, millennial coaching, and fundraising.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase
10	MBL Ventures	Exact match	St. Louis, MO, United StatesHQ recorded Sep 14, 2026	1-10	1 contacts →
	Exact match “MBL Ventures provides management consulting services for businesses, nonprofits, and public sector organizations navigating strategy, structure, and government.” Recorded in the RevenueBase company graph · Sep 14, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “nonprofit consulting providers”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 10 of 25 nonprofit consulting providers based in St. Louis, United States

See the full list, filter by size, metro and specialty, and access 37 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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

As of Sep 14, 2026

39.8%Verified-email coverage

3.7Average contacts per company

1-10Median size (employees)

Sep 14, 2026Page data refreshed

Companies by employee count

1-10

11-50

Email recency for this list is measured across the whole United States list rather than for St. Louis, so it is reported there. Company counts and contact totals on this page are exact for St. Louis, over 25 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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: Company records associated with St. Louis, United States whose business descriptions match “nonprofit consulting providers” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 37 professional contacts with verified work emails across the full matched dataset. 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 14, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Nonprofit consulting providers by metro in the United States

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “nonprofit consulting providers”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 25 company matches for nonprofit consulting providers associated with St. Louis, United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Zielinski Companies tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United States has the most nonprofit consulting providers?

New York leads the United States with 307 company records, followed by Washington (239) and Chicago (201). St. Louis has 25.

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 37 professional contacts with verified work emails tracked across these 25 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 14, 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.