Company lists · Data refreshed September 2026
Top 25 Pro bono public relations firms based in the United States
RevenueBase identified 1,190 pro bono public relations firms headquartered in the United States as of September 2026 and tracks 7,347 professional contacts across them, including 2,615 with verified work emails and 2,795 with mobile numbers. New York is the largest hub.
This list covers pro bono public relations firms 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 5, 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 public relations firms based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 195 contacts → | ||||
Strong evidence “At Boom, we develop cross-media strategic marketing and public relations for our clients that convince their target audience to solicit their business, attend their event or…” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 2 | 109 contacts → | ||||
Indirect evidence “At Gregory FCA, we’re a 30-year success story, forged by exceeding client expectations during every engagement.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 3 | 92 contacts → | ||||
Indirect evidence “At 40 Regan Communications Group (RCG) has hit its prime!” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 4 | 82 contacts → | ||||
Indirect evidence “You Make Cool Stuff.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 5 | 75 contacts → | ||||
Indirect evidence “At Jack Taylor PR, we are a collection of creative communicators supporting brands in their pursuit of a better human experience.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 6 | 72 contacts → | ||||
Indirect evidence “Most PR agencies optimize for process.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 7 | 61 contacts → | ||||
Indirect evidence “GG Benitez’s passion for writing and communications is just one element of her successful business endeavors.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 8 | 60 contacts → | ||||
Partial evidence “Publicity For Good is the #1 communications firm for purpose-driven brands specializing in amplifying brands and organizations that make a positive impact.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 9 | 52 contacts → | ||||
Strong evidence “Mueller Communications, LLC is a leading, full-service public relations agency located in Milwaukee, Wisconsin.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 10 | 51 contacts → | ||||
Strong evidence “Murphy O’Brien is a leading independent public relations and social media firm committed to delivering high-profile media coverage that makes a difference to our clients’…” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 11 | 49 contacts → | ||||
Indirect evidence “C&R is an award-winning agency with a global reach, specializing in full-service PR for travel, real estate, and golf developments.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 12 | 48 contacts → | ||||
Strong evidence “SeyferthPR was founded in Grand Rapids in 1984 and has built a reputation as one of the Midwest’s leading public relations agencies, currently representing more than 90 local…” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 13 | 47 contacts → | ||||
Indirect evidence “Castle is a certified women-owned business where local expertise meets global impact.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 14 | 45 contacts → | ||||
Indirect evidence “From award-winning hotels to sky-grazing residential towers, M18 keeps the stories of the world's most dynamic buildings and compelling hospitality destinations always at the…” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 15 | 41 contacts → | ||||
Indirect evidence “L.C.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 16 | 40 contacts → | ||||
Strong evidence “Ceisler Media is: A full-service public relations and issue advocacy firm with offices across Pennsylvania, guiding our clients through every step of their communications…” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 17 | 39 contacts → | ||||
Strong evidence “Glodow Nead Communications, LLC is a full-service, San Francisco-based lifestyle and hospitality PR firm specializing in strategic public relations, brand development, social…” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 18 | 39 contacts → | ||||
Strong evidence “Emily Blair Media is a full-service public relations firm serving clients all over the world.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 19 | 38 contacts → | ||||
Indirect evidence “Elevate your brand’s story and drive meaningful impact on your goals.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 20 | 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 5, 2026Thanks. The Data Team will review it. | |||||
| 21 | 34 contacts → | ||||
Indirect evidence “For almost 20 years, FPR has represented Pulitzer Prize winners, MacArthur Grant Geniuses, 24 #1 bestsellers, 319 bestsellers and books by 33 of the Thinkers50 list of the world’s…” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 22 | 34 contacts → | ||||
Strong evidence “Nuffer, Smith, Tucker provides public relations, strategic planning, public affairs, social media strategy, branding, traditional media relations, crisis and issues management…” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 23 | 33 contacts → | ||||
Strong evidence “Krupa is a boutique public relations firm that works with restaurants, better for you food brands, wellness pioneers and sustainable businesses.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 24 | 32 contacts → | ||||
Strong evidence “Haymaker leads public relations strategies for the most exciting high-growth companies in the U.S, including Eventbrite, Oatly, G2, and Gympass.” Source: RevenueBase Database · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 25 | 30 contacts → | ||||
Strong evidence “Founded in 1986, The Lippin Group is an independent, family-owned public relations firm that specializes in successfully providing communications strategies and campaigns to…” Source: RevenueBase Database · checked Sep 5, 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 public relations firms. 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 public relations firms.
- Partial evidence
- Its own public description names part of pro bono public relations firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name pro bono public relations firms. 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 1,190 pro bono public relations firms based in the United States
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Pro bono public relations firms based in the United States at a glance
As of Sep 5, 2026Companies by employee count
Freshness & accuracy
How recently the business emails on this list were verified
Email last verified
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 public relations firms, 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 public relations firms”. 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 public relations firms), 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 public relations firms, 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, 2,615 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.
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 public relations firms, 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 public relations firms are there based in the United States?
RevenueBase identified 1,190 pro bono public relations firms 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?
BOOM, headquartered in Chagrin Falls, tops this list with the largest team on record.
Which city has the most pro bono public relations firms?
New York leads with 96 headquartered companies, followed by Los Angeles (63) and Chicago (34).
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 2,615 verified decision-maker contacts tracked across these 1,190 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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Download this list →Related lists
Pro bono public relations firms by geography
- Pro bono public relations firms based in the United Kingdom
- Pro bono public relations firms based in London, United Kingdom
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- Pro bono public relations firms based in Boston, United States
- Pro bono public relations firms based in Chicago, United States
- Pro bono public relations firms based in Dallas, United States
- Pro bono public relations firms based in Houston, United States
- Pro bono public relations firms based in Los Angeles, United States
- Pro bono public relations firms based in Miami, United States
- Pro bono public relations firms based in New York, United States
- Pro bono public relations firms based in San Francisco, United States
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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