Company lists · Data refreshed September 2026

Top 25 Transparency and accountability nonprofits based in the United States

RevenueBase identified 118 company matches for transparency and accountability nonprofits associated with the United States as of September 2026 and tracks 2,012 professional contacts across them, including 728 with verified work emails. Washington is the largest hub.

This list covers company matches for transparency and accountability nonprofits associated with the 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 22, 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 22, 2026 How this list was built
118Companies
2,012Contacts tracked
728Verified emails
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The 25 largest transparency and accountability nonprofits based in the United States

Ranked by team size
Top 25 of 118 company matches for transparency and accountability nonprofits based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 22, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchWashington, DC, United StatesHQ recorded Sep 22, 202651-200401 contacts →

Exact match

“We are a nonpartisan, nonprofit organization working to building a better government and a stronger democracy.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
2Exact matchWashington, DC, United StatesHQ recorded Sep 22, 202651-200217 contacts →

Exact match

“Common Cause is a nonpartisan, grassroots organization dedicated to restoring the core values of American democracy, reinventing an open, honest and accountable government that…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
3Exact matchWashington, DC, United StatesHQ recorded Sep 22, 202651-200195 contacts →

Exact match

“Public Citizen is a nonprofit consumer advocacy organization that champions the public interest – your interests – in the halls of power.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
4Exact matchWashington, DC, United StatesHQ recorded Sep 22, 202651-200149 contacts →

Exact match

“Our vision is a world in which people with power are accountable.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
5Exact matchWashington, DC, United StatesHQ recorded Sep 22, 202611-5073 contacts →

Exact match

“Judicial Watch, Inc, a conservative, non-partisan educational foundation, promotes transparency, accountability and integrity in government, politics and the law.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
6Exact matchWashington, DC, United StatesHQ recorded Sep 22, 202611-5064 contacts →

Exact match

“Founded in 1981, the Project On Government Oversight (POGO) is an independent nonprofit that investigates and exposes corruption and other misconduct in order to achieve a more…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
7Exact matchWashington, DC, United StatesHQ recorded Sep 22, 202611-5053 contacts →

Exact match

“At CREW, we use aggressive legal actions, in-depth investigations, and innovative policy and reform work to achieve that vision.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
8Exact matchWashington, DC, United StatesHQ recorded Sep 22, 202611-5037 contacts →

Exact match

“Open Contracting Partnership aims to open up and transform public procurement to deliver fairer and better results for people, prosperity, and the planet.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
9Exact matchWashington, DC, United StatesHQ recorded Sep 22, 202611-5037 contacts →

Exact match

“American Oversight is a nonpartisan, nonprofit watchdog that advances truth, accountability, and democracy by enforcing the public’s right to government records.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
10Exact matchPhiladelphia, PA, United StatesHQ recorded Sep 22, 2026n/a36 contacts →

Exact match

“The Committee of Seventy has been called a "government watchdog,""the elections people" and a "think tank." We're all three and much more.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
11Exact matchChicago, IL, United StatesHQ recorded Sep 22, 202611-5031 contacts →

Exact match

“The BGA works for integrity, transparency, and accountability in government by exposing corruption and inefficiency; identifying and advocating effective public policy; and…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
12Exact matchWashington, DC, United StatesHQ recorded Sep 22, 202611-5030 contacts →

Exact match

“The Center for International Policy promotes cooperation, transparency and accountability in global relations.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
13Exact matchWashington, DC, United StatesHQ recorded Sep 22, 202611-5026 contacts →

Exact match

“The Capital Research Center was established in 1984 to examine how foundations, charities, and other nonprofits spend money and get involved in politics and advocacy, often in…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
14Exact matchMilwaukee, WI, United StatesHQ recorded Sep 22, 202611-5023 contacts →

Exact match

“The Wisconsin Policy Forum was created on January 1 with the merger of the Madison-based Wisconsin Taxpayers Alliance (founded: 1932) and the Milwaukee-based Public Policy Forum…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
15Exact matchWashington, DC, United StatesHQ recorded Sep 22, 20261-1023 contacts →

Exact match

“Accountable Now is a global collective of civil society actors with a common goal to do good, better.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
16Exact matchWinchester, VA, United StatesHQ recorded Sep 22, 202611-5022 contacts →

Exact match

“Enhancing trust, transparency and integrity in Christ-centered organizations nonprofits and churches through developing, maintaining accountability standards and God-honoring…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
17Exact matchWashington, DC, United StatesHQ recorded Sep 22, 202611-5022 contacts →

Exact match

“The National Committee for Responsive Philanthropy in Washington, D.C, is a national watchdog, research and advocacy organization that promotes philanthropy that serves the public…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
18Exact matchWashington, DC, United StatesHQ recorded Sep 22, 202651-20015 contacts →

Exact match

“Partnership for Transparency (PTF) works to advance innovative citizen-led approaches to improve governance, increase transparency, promote the rule of law and reduce corruption…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
19Exact matchBurr Ridge, IL, United StatesHQ recorded Sep 22, 202611-5015 contacts →

Exact match

“Our mission is to report “Every dime.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
20Exact matchRaleigh, NC, United StatesHQ recorded Sep 22, 20261-1014 contacts →

Exact match

“Common Cause North Carolina is a nonprofit and nonpartisan organization dedicated to upholding the core values of American democracy.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
21Exact matchDayton, OH, United StatesHQ recorded Sep 22, 20261-1011 contacts →

Exact match

“We champion and advocate good governance, equity, and economic development”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
22Exact matchWashington, DC, United StatesHQ recorded Sep 22, 20261-1011 contacts →

Exact match

“Citizens Against Government Waste (CAGW) is a private, non-partisan, nonprofit organization representing more than one million members and supporters nationwide.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
23Exact matchChicago, IL, United StatesHQ recorded Sep 22, 202611-5010 contacts →

Exact match

“Citizens need accurate and complete financial information to be informed participants in the government's financial decisions.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
24Exact matchSeymour, IN, United StatesHQ recorded Sep 22, 20261-1010 contacts →

Exact match

“Jackson County United Way is building a stronger community by creating long-lasting change!”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
25Exact matchWashington, DC, United StatesHQ recorded Sep 22, 202611-509 contacts →

Exact match

“Global Integrity supports progress toward open and accountable governance in countries and communities around the world.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase

Showing 25 of 118 transparency and accountability nonprofits based in the United States

See the full list, filter by size, metro and specialty, and access 728 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Transparency and accountability nonprofits based in the United States at a glance

As of Sep 22, 2026
36.2%Verified-email coverage
17.1Average contacts per company
1-10Median size (employees)
24.6%Largest-city concentration · Washington
Sep 22, 2026Page data refreshed

Companies by employee count

1-10
82
11-50
27
51-200
9

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 118 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 the United States whose business descriptions match “transparency and accountability nonprofits” 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 728 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 22, 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.

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 “transparency and accountability nonprofits”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many transparency and accountability nonprofits are there based in the United States?

RevenueBase identified 118 company matches for transparency and accountability nonprofits associated with the 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?

Partnership For Public Service tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most transparency and accountability nonprofits?

Washington leads with 29 company records, followed by New York (6) and Chicago (4).

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 728 professional contacts with verified work emails tracked across these 118 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 22, 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.