Company lists · Data refreshed September 2026

Top 25 Anti-corruption organizations based in Washington, United States

Name: Anti-corruption organizations based in Washington, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 24, 2026 43 companies tracked

RevenueBase identified 43 anti-corruption organizations headquartered in Washington, United States as of September 2026 and tracks 1,471 professional contacts across them, including 552 with verified work emails and 462 with mobile numbers. Across the United States, Washington is the largest hub for this category.

This list covers anti-corruption organizations headquartered in Washington, 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 24, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 RevenueBase Smart Search rating on every row Refreshed Sep 24, 2026 86% judged on-target in blind review

43Companies

1,471Contacts tracked

552Verified emails

462Mobile numbers

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The 25 largest anti-corruption organizations based in Washington, United States

Ranked by team size

Top 25 of 43 anti-corruption organizations based in Washington, United States, ranked by team size, largest first. Data refreshed Sep 24, 2026. RevenueBase Smart Search rates how each company's information relates to anti-corruption organizations: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Government Accountability Project	Indirect evidence	Washington, DC, United StatesHQ checked Sep 24, 2026	n/a	227 contacts →
	Indirect evidence “Government Accountability Project is the nation’s leading whistleblower protection and advocacy organization.” Source: RevenueBase Database · checked Sep 24, 2026
2	Common Cause	Indirect evidence	Washington, DC, United StatesHQ checked Sep 24, 2026	51-200	217 contacts →
	Indirect evidence “Common Cause is a nonpartisan, grassroots organization dedicated to restoring the core values of American democracy, reinventing an open, honest and accountable government that…” Source: RevenueBase Database · checked Sep 24, 2026
3	Open Government Partnership	Indirect evidence	Washington, DC, United StatesHQ checked Sep 24, 2026	51-200	167 contacts →
	Indirect evidence “The Open Government Partnership (OGP) is a multi-stakeholder initiative focused on improving government transparency, accountability and people's participation.” Source: RevenueBase Database · checked Sep 24, 2026
4	Accountability LAB	Indirect evidence	Washington, DC, United StatesHQ checked Sep 24, 2026	51-200	149 contacts →
	Indirect evidence “Our vision is a world in which people with power are accountable.” Source: RevenueBase Database · checked Sep 24, 2026
5	International Budget Partnership	Indirect evidence	Washington, DC, United StatesHQ checked Sep 24, 2026	51-200	85 contacts →
	Indirect evidence “The International Budget Partnership collaborates with civil society organizations around the world to improve governance and ensure that scarce public resources are used…” Source: RevenueBase Database · checked Sep 24, 2026
6	Judicial Watch	Indirect evidence	Washington, DC, United StatesHQ checked Sep 24, 2026	11-50	73 contacts →
	Indirect evidence “Judicial Watch, Inc, a conservative, non-partisan educational foundation, promotes transparency, accountability and integrity in government, politics and the law.” Source: RevenueBase Database · checked Sep 24, 2026
7	International Consortium Of Investigative Journalists Icij	Indirect evidence	Washington, DC, United StatesHQ checked Sep 24, 2026	11-50	72 contacts →
	Indirect evidence “The International Consortium of Investigative Journalists tells stories that show how the world really works, triggering positive change.” Source: RevenueBase Database · checked Sep 24, 2026
8	Project On Government Oversight	Partial evidence	Washington, DC, United StatesHQ checked Sep 24, 2026	11-50	64 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 24, 2026
9	Issue ONE	Indirect evidence	Washington, DC, United StatesHQ checked Sep 24, 2026	11-50	54 contacts →
	Indirect evidence “WHO WE ARE: Issue One is the nation's leading political reform organization-uniting Republicans, Democrats, and independents around one goal: a democracy that actually works for…” Source: RevenueBase Database · checked Sep 24, 2026
10	Citizens For Responsibility And Ethics In Washington Crew	Indirect evidence	Washington, DC, United StatesHQ checked Sep 24, 2026	11-50	53 contacts →
	Indirect evidence “At CREW, we use aggressive legal actions, in-depth investigations, and innovative policy and reform work to achieve that vision.” Source: RevenueBase Database · checked Sep 24, 2026
11	Open Contracting Partnership	Indirect evidence	Washington, DC, United StatesHQ checked Sep 24, 2026	11-50	37 contacts →
	Indirect evidence “Open Contracting Partnership aims to open up and transform public procurement to deliver fairer and better results for people, prosperity, and the planet.” Source: RevenueBase Database · checked Sep 24, 2026
12	American Oversight	Indirect evidence	Washington, DC, United StatesHQ checked Sep 24, 2026	11-50	37 contacts →
	Indirect evidence “American Oversight is a nonpartisan, nonprofit watchdog that advances truth, accountability, and democracy by enforcing the public’s right to government records.” Source: RevenueBase Database · checked Sep 24, 2026
13	American Economic Liberties Project	Partial evidence	Washington, DC, United StatesHQ checked Sep 24, 2026	11-50	35 contacts →
	Partial evidence “The American Economic Liberties Project launched in February 2020 to help translate the intellectual victories of the anti-monopoly movement into momentum towards concrete…” Source: RevenueBase Database · checked Sep 24, 2026
14	Global Financial Integrity	Indirect evidence	Washington, DC, United StatesHQ checked Sep 24, 2026	11-50	35 contacts →
	Indirect evidence “Global Financial Integrity (GFI) is a Washington, DC-based think tank, producing high-caliber analyses of illicit financial flows, advising developing country governments on…” Source: RevenueBase Database · checked Sep 24, 2026
15	Center For International Policy	Indirect evidence	Washington, DC, United StatesHQ checked Sep 24, 2026	11-50	30 contacts →
	Indirect evidence “The Center for International Policy promotes cooperation, transparency and accountability in global relations.” Source: RevenueBase Database · checked Sep 24, 2026
16	Partnership For Transparency	Partial evidence	Washington, DC, United StatesHQ checked Sep 24, 2026	51-200	15 contacts →
	Partial evidence “Partnership for Transparency (PTF) works to advance innovative citizen-led approaches to improve governance, increase transparency, promote the rule of law and reduce corruption…” Source: RevenueBase Database · checked Sep 24, 2026
17	The Sentry	Indirect evidence	Washington, DC, United StatesHQ checked Sep 24, 2026	11-50	13 contacts →
	Indirect evidence “The Sentry is an investigative and policy organization that seeks to disable multinational predatory networks that benefit from violent conflict, repression, and kleptocracy.” Source: RevenueBase Database · checked Sep 24, 2026
18	Whistleblower AID	Indirect evidence	Washington, DC, United StatesHQ checked Sep 24, 2026	1-10	9 contacts →
	Indirect evidence “Whistleblower Aid is a non-profit, legal organization in Washington, D.C.” Source: RevenueBase Database · checked Sep 24, 2026
19	Global Integrity	Indirect evidence	Washington, DC, United StatesHQ checked Sep 24, 2026	11-50	9 contacts →
	Indirect evidence “Global Integrity supports progress toward open and accountable governance in countries and communities around the world.” Source: RevenueBase Database · checked Sep 24, 2026
20	Coalition For Integrity	Indirect evidence	Washington, DC, United StatesHQ checked Sep 24, 2026	1-10	8 contacts →
	Indirect evidence “The Coalition for Integrity (C4I) is a nonpartisan nonprofit that works across business, government, and civil society to strengthen the systems that uphold accountability…” Source: RevenueBase Database · checked Sep 24, 2026
21	Fact Coalition	Indirect evidence	Washington, DC, United StatesHQ checked Sep 24, 2026	1-10	6 contacts →
	Indirect evidence “The Financial Accountability & Corporate Transparency (FACT) Coalition is a nonpartisan alliance of over 100 state, national, and global groups working toward a fair tax system…” Source: RevenueBase Database · checked Sep 24, 2026
22	Alliance To Counter Crime Online	Indirect evidence	Washington, DC, United StatesHQ checked Sep 24, 2026	1-10	6 contacts →
	Indirect evidence “ACCO is an alliance of 30 non-profits, academics and citizen investigators collectively fighting the growth of serious organized crime on the surface web.” Source: RevenueBase Database · checked Sep 24, 2026
23	Fund For Constitutional Government	Indirect evidence	Washington, DC, United StatesHQ checked Sep 24, 2026	11-50	3 contacts →
	Indirect evidence “Founded in 1974, the Fund for Constitutional Government (FCG) is a 501(c)(3) organization dedicated to promoting democracy, government and corporate transparency, fair economies…” Source: RevenueBase Database · checked Sep 24, 2026
24	100reporters	Indirect evidence	Washington, United StatesHQ checked Sep 24, 2026	1-10	3 contacts →
	Indirect evidence “100Reporters is a news organization dedicated to forging new frontiers in responsible journalism.” Source: RevenueBase Database · checked Sep 24, 2026
25	Transparency International U.S	Partial evidence	Washington, DC, United StatesHQ checked Sep 24, 2026	1-10	2 contacts →
	Partial evidence “We are Transparency International U.S.(TI US), part of the world’s largest coalition against corruption.” Source: RevenueBase Database · checked Sep 24, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: anti-corruption organizations. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names anti-corruption organizations.
Partial evidence: Its own public description names part of anti-corruption organizations, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name anti-corruption organizations. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 43 anti-corruption organizations based in Washington, United States

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Anti-corruption organizations based in Washington, United States at a glance

As of Sep 24, 2026

37.5%Verified-email coverage

31.4%Mobile-number coverage

34.2Average contacts per company

11-50Median size (employees)

Sep 24, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 27.0d

4240–30

11931–60

661–90

090–180

3180+

Company record updated

Median 74.0d

00–30

47331–60

55661–90

34490–180

98180+

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 anti-corruption organizations, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search 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 Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Washington, United States whose own description of what they do matches “anti-corruption organizations”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names anti-corruption organizations), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among anti-corruption organizations, and records with no verified work email. Companies headquartered outside Washington 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 its RevenueBase Smart Search 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, 552 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 24, 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

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names anti-corruption organizations, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many anti-corruption organizations are there based in Washington, United States?

RevenueBase identified 43 anti-corruption organizations headquartered in Washington, 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?

Government Accountability Project, headquartered in Washington, tops this list with the largest team on record.

Which city in the United States has the most anti-corruption organizations?

Washington leads the United States with 43 headquartered companies, followed by New York (6) and Austin (5).

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 552 verified decision-maker contacts tracked across these 43 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 24, 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 Smart Search, 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.