Company lists · Data refreshed September 2026
Top 25 Infosec pr firms worldwide
RevenueBase identified 5,057 infosec pr firms worldwide as of September 2026 and tracks 47,013 professional contacts across them, including 16,889 with verified work emails. The United States is the largest market and New York the largest hub.
This list covers infosec pr firms worldwide, 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 28, 2026. Country and city lists for infosec pr firms follow the table.
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 infosec pr firms worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,920 contacts → | ||||
Partial evidence “Adfactors PR, founded in 1997, is India's largest Public Relations firm.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 2 | 1,232 contacts → | ||||
Indirect evidence “GuidePoint Security provides trusted cybersecurity expertise, solutions, and services that help organizations make informed decisions and minimize risk.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 3 | 785 contacts → | ||||
Indirect evidence “ASK is now Convergence Networks!” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 4 | 586 contacts → | ||||
Indirect evidence “Advens is a European, independent and outstanding leader in cybersecurity.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 5 | 543 contacts → | ||||
Indirect evidence “Prosek Partners builds – and protects – the top brands in business.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 6 | 506 contacts → | ||||
Indirect evidence “Founded in 2008, OWN is a Pure Player in cybersecurity, with offices in Paris, Rennes and Toulouse, but with a presence throughout France with its fully remote employees.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 7 | 502 contacts → | ||||
Indirect evidence “SecurityHQ, a global cybersecurity company pioneering Security Performance Engineering for stronger operational performance and resilience.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 8 | 484 contacts → | ||||
Indirect evidence “At ProTechmanize, we’re committed to making cybersecurity simpler, stronger, and more future ready for the organizations we serve.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 9 | 397 contacts → | ||||
Partial evidence “5WPR is one of the largest independently owned PR and digital marketing agencies in the US.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 10 | 349 contacts → | ||||
Indirect evidence “DKC is a full service public relations, marketing and government affairs firm and part of the Acceleration Community of Companies, Based in New York City, and with offices in Los…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 11 | 348 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 12 | 344 contacts → | ||||
Indirect evidence “Bishop Fox is recognized as the leading authority in offensive security, providing solutions ranging from continuous penetration testing, red teaming, and attack surface…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 13 | 315 contacts → | ||||
Indirect evidence “NVISO is a cyber security services firm composed of outstanding security professionals - each has a specific field of expertise, ranging from security research and risk management…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 14 | 302 contacts → | ||||
Indirect evidence “Built to operate with the speed and intensity of a political campaign, BerlinRosen takes a 360-degree approach to communications, activating audiences and elevating story above…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 15 | 267 contacts → | ||||
Partial evidence “Value 360 Communications is India’s first PR Company with a focussed approach for early stage business.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 16 | 257 contacts → | ||||
Partial evidence “Hotwire Global is the preeminent tech PR, communications, and marketing consultancy.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 17 | 255 contacts → | ||||
Indirect evidence “NATIONAL Public Relations provides creative communications solutions that move people in thought and actions.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 18 | 249 contacts → | ||||
Indirect evidence “Sygnia is a cyber technology and services company, providing high-end consulting and incident response support for organizations worldwide.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 19 | 224 contacts → | ||||
Indirect evidence “We’re an award-winning, founder-led, communications agency based in London, Minneapolis, New York and San Francisco with an extensive global capability.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 20 | 220 contacts → | ||||
Indirect evidence “For over 20 years, leading companies in Telecom, Cybersecurity, Healthcare, Banking, New Media, and more have come to rely on Loginsoft as a trusted resource for technology talent.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 21 | 215 contacts → | ||||
Indirect evidence “O nosso trabalho é proteger o seu.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 22 | 213 contacts → | ||||
Indirect evidence “Axicom is the Burson agency for tech brands & brands with a tech story.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 23 | 213 contacts → | ||||
Partial evidence “Harvard is an award-winning integrated Marketing and PR agency for tech brands big and small, with a full-service offering including: media and analyst relations, marketing…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 24 | 210 contacts → | ||||
Partial evidence “An integrated communications agency, Kaizzen, has won the top spot as one of the fastest growing PR Agency globally for the last 4 years, as per the PRovoke Global PR Agency…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 25 | 209 contacts → | ||||
Partial evidence “Somos “The PR PowerHouse”, uma verdadeira potência em PR e todas as suas disciplinas.” Source: RevenueBase Database · checked Sep 28, 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: infosec pr 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 infosec pr firms.
- Partial evidence
- Its own public description names part of infosec pr firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name infosec pr 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 5,057 infosec pr firms worldwide
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Infosec pr firms worldwide at a glance
As of Sep 28, 2026Companies by employee count
Email recency is reported on each country list linked below.
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 infosec pr 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.
- Coverage
- Every country. Country and city lists for infosec pr firms are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “infosec pr 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 infosec pr 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 infosec pr firms, and records with no verified work email.
- 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, 16,889 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 28, 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.
Infosec pr firms by location
38 lists · largest firstEvery Infosec pr firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Infosec pr firms based in the United States1,797
- Infosec pr firms based in the United Kingdom311
- Infosec pr firms based in India269
- Infosec pr firms based in France136
- Infosec pr firms based in Canada134
- Infosec pr firms based in Brazil126
- Infosec pr firms based in Australia111
- Infosec pr firms based in Germany95
- Infosec pr firms based in Israel93
- Infosec pr firms based in Spain79
- Infosec pr firms based in Italy52
- Infosec pr firms based in Mexico48
- Infosec pr firms based in the Netherlands47
- Infosec pr firms based in Switzerland39
- Infosec pr firms based in Poland37
- Infosec pr firms based in Indonesia35
- Infosec pr firms based in South Africa35
- Infosec pr firms based in Colombia31
- Infosec pr firms based in Chile30
- Infosec pr firms based in Belgium27
- Infosec pr firms based in Türkiye27
Cities
- Infosec pr firms based in New York, United States130
- Infosec pr firms based in London, United Kingdom120
- Infosec pr firms based in Washington, United States69
- Infosec pr firms based in Paris, France62
- Infosec pr firms based in San Francisco, United States57
- Infosec pr firms based in Sao Paulo, Brazil56
- Infosec pr firms based in Los Angeles, United States51
- Infosec pr firms based in Chicago, United States40
- Infosec pr firms based in Tel Aviv, Israel39
- Infosec pr firms based in Toronto, Canada39
- Infosec pr firms based in Atlanta, United States38
- Infosec pr firms based in Austin, United States38
- Infosec pr firms based in Dallas, United States35
- Infosec pr firms based in Mumbai, India30
- Infosec pr firms based in Sydney, Australia27
- Infosec pr firms based in Boston, United States26
- Infosec pr firms based in Miami, United States26
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 infosec pr 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 infosec pr firms are there worldwide?
RevenueBase identified 5,057 infosec pr firms worldwide 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?
Adfactors PR, headquartered in Mumbai, tops this list with the largest team on record.
Which country has the most infosec pr firms?
The United States leads with 1,797 companies, followed by the United Kingdom (311) and India (269). Every infosec pr firms list by country and city is linked on this page.
Which city has the most infosec pr firms?
New York leads with 130 headquartered companies, followed by London (121) and Washington (69).
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 16,889 verified decision-maker contacts tracked across these 5,057 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 28, 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.