Company lists · Data refreshed September 2026

Top 25 Infosec pr firms worldwide

Name: Infosec pr firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 5,057 companies tracked

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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

5,057Companies

47,013Contacts tracked

16,889Verified emails

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The 25 largest infosec pr firms worldwide

Ranked by team size

Top 25 of 5,057 infosec pr firms worldwide, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to infosec pr firms: 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	Adfactors PR	Partial evidence	Mumbai, IndiaHQ checked Sep 28, 2026	1,001-5,000	1,920 contacts →
	Partial evidence “Adfactors PR, founded in 1997, is India's largest Public Relations firm.” Source: RevenueBase Database · checked Sep 28, 2026
2	Guidepoint Security	Indirect evidence	Reston, VA, United StatesHQ checked Sep 28, 2026	1,001-5,000	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, 2026
3	Application Specialist Kompany ASK	Indirect evidence	Lansing, MI, United StatesHQ checked Sep 28, 2026	n/a	785 contacts →
	Indirect evidence “ASK is now Convergence Networks!” Source: RevenueBase Database · checked Sep 28, 2026
4	Advens	Indirect evidence	Paris, ItalyHQ checked Sep 28, 2026	501-1,000	586 contacts →
	Indirect evidence “Advens is a European, independent and outstanding leader in cybersecurity.” Source: RevenueBase Database · checked Sep 28, 2026
5	Prosek Partners	Indirect evidence	New York, NY, United StatesHQ checked Sep 28, 2026	201-500	543 contacts →
	Indirect evidence “Prosek Partners builds – and protects – the top brands in business.” Source: RevenueBase Database · checked Sep 28, 2026
6	own.security	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	51-200	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, 2026
7	Securityhq	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	501-1,000	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, 2026
8	Protechmanize	Indirect evidence	Thane, IndiaHQ checked Sep 28, 2026	501-1,000	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, 2026
9	5wpr	Partial evidence	New York, NY, United StatesHQ checked Sep 28, 2026	201-500	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, 2026
10	DKC	Indirect evidence	New York, NY, United StatesHQ checked Sep 28, 2026	201-500	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, 2026
11	SK Shieldus	Indirect evidence	경기도, South KoreaHQ checked Sep 28, 2026	5,001-10,000	348 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
12	Bishop FOX	Indirect evidence	Tempe, AZ, United StatesHQ checked Sep 28, 2026	201-500	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, 2026
13	Nviso Security	Indirect evidence	Brussels, BelgiumHQ checked Sep 28, 2026	201-500	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, 2026
14	Berlinrosen, An Orchestra Company	Indirect evidence	New York, NY, United StatesHQ checked Sep 28, 2026	201-500	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, 2026
15	V360 Group	Partial evidence	Okhla, IndiaHQ checked Sep 28, 2026	201-500	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, 2026
16	Hotwire	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	201-500	257 contacts →
	Partial evidence “Hotwire Global is the preeminent tech PR, communications, and marketing consultancy.” Source: RevenueBase Database · checked Sep 28, 2026
17	National Public Relations	Indirect evidence	Montreal, QC, CanadaHQ checked Sep 28, 2026	201-500	255 contacts →
	Indirect evidence “NATIONAL Public Relations provides creative communications solutions that move people in thought and actions.” Source: RevenueBase Database · checked Sep 28, 2026
18	Sygnia	Indirect evidence	Tel Aviv, IsraelHQ checked Sep 28, 2026	201-500	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, 2026
19	Brands2life	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	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, 2026
20	Loginsoft	Indirect evidence	Chantilly, VA, United StatesHQ checked Sep 28, 2026	201-500	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, 2026
21	Redbelt Security	Indirect evidence	Sao Paulo, BrazilHQ checked Sep 28, 2026	51-200	215 contacts →
	Indirect evidence “O nosso trabalho é proteger o seu.” Source: RevenueBase Database · checked Sep 28, 2026
22	Axicom	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	213 contacts →
	Indirect evidence “Axicom is the Burson agency for tech brands & brands with a tech story.” Source: RevenueBase Database · checked Sep 28, 2026
23	Harvard	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	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, 2026
24	Kaizzen	Partial evidence	Delhi, IndiaHQ checked Sep 28, 2026	51-200	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, 2026
25	CDN Comunicação	Partial evidence	São Paulo, BrazilHQ checked Sep 28, 2026	201-500	209 contacts →
	Partial evidence “Somos “The PR PowerHouse”, uma verdadeira potência em PR e todas as suas disciplinas.” Source: RevenueBase Database · checked Sep 28, 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: 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, 2026

35.9%Verified-email coverage

9.3Average contacts per company

1-10Median size (employees)

2.6%Largest-city concentration · New York

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

3,282

11-50

1,455

51-200

244

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 first

Every Infosec pr firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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.