Company lists · Data refreshed September 2026
Top 25 Pro bono research organizations based in the United States
RevenueBase identified 239 pro bono research organizations headquartered in the United States as of September 2026 and tracks 7,681 professional contacts across them, including 2,944 with verified work emails. Washington is the largest hub.
This list covers pro bono research organizations headquartered in the 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 20, 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.
The 25 largest pro bono research organizations based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 2,660 contacts → | ||||
Partial evidence “RAND is a nonprofit, nonpartisan research organization that provides leaders with the information they need to make evidence-based decisions.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 2 | 643 contacts → | ||||
Partial evidence “GRC Group (Global Research & Consulting) is a 501(c)(3) nonprofit with over active students from various cultural and academic backgrounds.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 3 | 240 contacts → | ||||
Indirect evidence “Each year Neighborhood Legal Services of Los Angeles County (NLSLA) provides free assistance to more than individuals and families through innovative projects that expand access…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 174 contacts → | ||||
Indirect evidence “Founded in 1974, Bet Tzedek pursues equal justice for all by providing high-quality, free legal services to the unhoused, undocumented immigrants, LGBTQIA+ community, low-wage…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 5 | 145 contacts → | ||||
Indirect evidence “Children’s Law Center believes every child should grow up with a strong foundation of family, health and education and live in a world free from poverty, trauma, racism and other…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 142 contacts → | ||||
Indirect evidence “Established in 1958, Legal Aid Center of Southern Nevada is a private, non-profit, 501(c)(3) organization that ensures equal access to justice through free legal advice and…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 118 contacts → | ||||
Indirect evidence “Established in 1912 and serving more than individuals annually, the Legal Aid Bureau of Buffalo is the largest and oldest provider of indigent legal services in Western New York.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 77 contacts → | ||||
Indirect evidence “The Volunteer Lawyers Project of the Boston Bar Association (VLP) is a private non-profit organization, established in 1977, that provides free civil legal assistance to…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 75 contacts → | ||||
Indirect evidence “Atlanta Volunteer Lawyers Foundation (AVLF) is a nonprofit that stands with low-income Atlantans as they demand safe and stable housing, insist on fair pay, and break free from…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 72 contacts → | ||||
Strong evidence “The Support Center for Child Advocates is the nation’s oldest and largest program dedicated exclusively to providing pro bono legal services for children in crisis.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 72 contacts → | ||||
Indirect evidence “Legal Aid Society of Louisville, Kentucky, is a non-profit law firm that provides free legal services for people living in poverty with civil, legal matters.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 12 | 71 contacts → | ||||
Indirect evidence “Our Mission: Florida Legal Services is a statewide leader in advancing economic, social and racial justice.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 13 | 67 contacts → | ||||
Indirect evidence “For more than 50 years, Charlotte Center for Legal Advocacy has been a champion for those in need, providing legal representation to people who can't afford it, but desperately…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 58 contacts → | ||||
Strong evidence “About Us With more than 59 years of experience, CVLS is the first and pre-eminent pro bono civil legal aid provider in Chicago.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 15 | 50 contacts → | ||||
Strong evidence “Neighborhood Christian Legal Clinic is a non-profit 501(c)(3) corporation offering pro bono legal representation and preventive legal education to disadvantaged individuals in…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 50 contacts → | ||||
Indirect evidence “The Erie County Bar Association Volunteer Lawyers Project, Inc.(VLP) is a 501(c)(3) not for profit corporation which provides free civil legal services to low income individuals…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 17 | 49 contacts → | ||||
Strong evidence “The Pro Bono Resource Center of Maryland (PBRC) is the non-profit organization established in 1990 to serve as the statewide clearinghouse for volunteer legal services.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 49 contacts → | ||||
Indirect evidence “At Rising for Justice, we believe everyone deserves justice-today, tomorrow and always.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 48 contacts → | ||||
Indirect evidence “Founded in 1968 to bring the civil rights movement from the streets into the courts, the Lawyers’ Committee for Civil Rights of the San Francisco Bay Area works to advance…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 44 contacts → | ||||
Indirect evidence “Maryland Volunteer Lawyers Service (MVLS) removes barriers to justice through free civil legal help, community engagement, and advocacy for equitable laws.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 40 contacts → | ||||
Indirect evidence “The Center for Disability & Elder Law (CDEL) was founded to provide legal services to low income residents of Cook County, Illinois who are either elderly or who have permanent…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 37 contacts → | ||||
Strong evidence “SOAR strengthens nonprofits through collaborative, pro bono consulting that builds organizational capacity and deepens community impact while fostering an enriching learning…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 37 contacts → | ||||
Indirect evidence “Houston Volunteer Lawyers is a non-profit service of the Houston Bar Association.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 36 contacts → | ||||
Indirect evidence “Established in 1968, Greater Bakersfield Legal Assistance, Incorporated (GBLA) is a 501 (c)(3) non-profit organization that offers free legal services in civil matters to…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 36 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
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: pro bono research 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 pro bono research organizations.
- Partial evidence
- Its own public description names part of pro bono research organizations, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name pro bono research 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 239 pro bono research organizations based in the United States
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Pro bono research organizations based in the United States at a glance
As of Sep 20, 2026Companies by employee count
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 239 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 pro bono research 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 the United States whose own description of what they do matches “pro bono research 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 pro bono research 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 pro bono research organizations, and records with no verified work email. Companies headquartered outside United States 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, 2,944 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 20, 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 pro bono research 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 pro bono research organizations are there based in the United States?
RevenueBase identified 239 pro bono research organizations headquartered in the 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?
RAND, headquartered in Santa Monica, tops this list with the largest team on record.
Which city has the most pro bono research organizations?
Washington leads with 17 headquartered companies, followed by Chicago (15) and New York (15).
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 2,944 verified decision-maker contacts tracked across these 239 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 20, 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.
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