Company lists · Data refreshed November 2026

Top 25 Infosec communications agencies based in the United Kingdom

Name: Infosec communications agencies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 303 companies tracked

RevenueBase identified 303 company matches for infosec communications agencies associated with the United Kingdom as of November 2026 and tracks 2,858 professional contacts across them, including 1,279 with verified work emails. London is the largest hub.

This list covers company matches for infosec communications agencies associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built

303Companies

2,858Contacts tracked

1,279Verified emails

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The 25 largest infosec communications agencies based in the United Kingdom

Ranked by team size

Top 25 of 303 company matches for infosec communications agencies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Brands2life	Exact match	London, United KingdomHQ recorded Nov 6, 2026	51-200	233 contacts →
	Exact match “We’re an award-winning, founder-led, communications agency based in London, Minneapolis, New York and San Francisco with an extensive global capability.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	Cavendish	Exact match	London, United KingdomHQ recorded Nov 6, 2026	51-200	188 contacts →
	Exact match “Helping organisations build and protect value in complex and contested environments.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	The PHA Group	Exact match	London, United KingdomHQ recorded Nov 6, 2026	51-200	92 contacts →
	Exact match “PHA is an award-winning earned-first integrated communications agency.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4	Amethyst Risk Management	Exact match	Basingstoke, United KingdomHQ recorded Nov 6, 2026	11-50	91 contacts →
	Exact match “Amethyst Risk Management is a leading cybersecurity consultancy supplying expert services and support to the UK Government, Defence, Operators of Essential Services, and the…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	Saepio Information Security	Exact match	High Wycombe, United KingdomHQ recorded Nov 6, 2026	51-200	86 contacts →
	Exact match “Saepio increase awareness, reduce risk and improve security in a continually evolving threat landscape.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	Different PR	Exact match	Harrogate, United KingdomHQ recorded Nov 6, 2026	n/a	81 contacts →
	Exact match “We are a Yorkshire PR company that specialises in getting our clients and their products in the news via public relations and media relations campaigns, stunts and one off news…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	NEXOR	Exact match	Nottingham, United KingdomHQ recorded Nov 6, 2026	51-200	75 contacts →
	Exact match “Nexor is a Secure Information Exchange Specialist offering High Assurance threat and risk mitigation expertise and solutions into complex and sensitive networks globally.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	Daintta	Exact match	London, United KingdomHQ recorded Nov 6, 2026	51-200	69 contacts →
	Exact match “We provide deep expertise with technical and business specialists to help clients secure and protect the UK.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	Cyro Cyber	Exact match	London, United KingdomHQ recorded Nov 6, 2026	51-200	66 contacts →
	Exact match “Cyro Cyber are your cyber security Guardians.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	Cyberlab	Exact match	Macclesfield, United KingdomHQ recorded Nov 6, 2026	51-200	64 contacts →
	Exact match “CyberLab is the UK-leading cyber security consultancy and managed services provider, trusted by over 1,200 enterprise businesses, government departments, and household names to…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	Talk Straight Group	Exact match	Ilkley, United KingdomHQ recorded Nov 6, 2026	11-50	59 contacts →
	Exact match “Talk Straight has been looking after the communications and network security for thousands of public and private sector organisations since 2007.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	MDSEC	Exact match	Macclesfield, United KingdomHQ recorded Nov 6, 2026	11-50	57 contacts →
	Exact match “MDSec are a UK based consultancy with a passion for information security.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	Whiteoaks International	Exact match	Hook, United KingdomHQ recorded Nov 6, 2026	11-50	54 contacts →
	Exact match “On a mission to be the UK’s most accountable PR agency, Whiteoaks embrace a deliberately different approach.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	Electranet UK Limited	Exact match	London, United KingdomHQ recorded Nov 6, 2026	51-200	50 contacts →
	Exact match “Electranet’s mission is to be a preferred partner to the public and private sectors, bringing competitively priced, secure and innovative solutions to the market.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	Satisnet, A Gamma Company	Exact match	Luton, United KingdomHQ recorded Nov 6, 2026	51-200	45 contacts →
	Exact match “Established in 2004 (acquired by Gamma in 2023), Satisnet, a Gamma company is a pedigree-proven cyber security services and solutions specialist with a fully UK-based 24x7x365 SOC.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	Secforce LTD	Exact match	London, United KingdomHQ recorded Nov 6, 2026	11-50	44 contacts →
	Exact match “SECFORCE are vendor independent offensive security specialists providing effective business risk intelligence and strategic security consulting.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	Computer Network Defence LTD CND	Exact match	Corsham, United KingdomHQ recorded Nov 6, 2026	11-50	40 contacts →
	Exact match “Computer Network Defence Ltd are a UK based cyber security consultancy with an extremely broad spectrum of capability.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	Omerta	Exact match	Saffron Walden, United KingdomHQ recorded Nov 6, 2026	51-200	38 contacts →
	Exact match “Omerta - A Global Security Technology and Services Company.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	Citation Cyber	Exact match	Lancaster, United KingdomHQ recorded Nov 6, 2026	11-50	37 contacts →
	Exact match “Cyber security can feel overwhelming.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	I3secure LTD	Exact match	Bristol, United KingdomHQ recorded Nov 6, 2026	11-50	31 contacts →
	Exact match “We help Defence, Government and highly regulated organisations solve complex cyber security and information assurance challenges, from Secure by Design and security architecture…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	Cyb3r	Exact match	London, United KingdomHQ recorded Nov 6, 2026	51-200	30 contacts →
	Exact match “CYB3R Group, is a leading provider of comprehensive Cyber Security, IT and Communications Solutions.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	Spreckley	Exact match	London, United KingdomHQ recorded Nov 6, 2026	11-50	29 contacts →
	Exact match “Digital transformation and business continuity are at the heart of our creative, integrated and content-driven PR campaigns.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	Cyber Security Specialists	Exact match	Altrincham, United KingdomHQ recorded Nov 6, 2026	11-50	29 contacts →
	Exact match “Based in Manchester UK, we are an independent Cyber Security Consultancy providing Security services across a wide range of markets, from multi-national Corporate Organisations…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24	Cyberis	Exact match	Tewkesbury, United KingdomHQ recorded Nov 6, 2026	11-50	24 contacts →
	Exact match “Cyberis are pioneers in customer-focussed information security.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25	Kiris Group	Exact match	London, United KingdomHQ recorded Nov 6, 2026	11-50	24 contacts →
	Exact match “Our Chartered Security Professionals seamlessly integrate discreet and effective security into lifestyles and organisations.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “infosec communications agencies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 303 infosec communications agencies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 1,279 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Infosec communications agencies based in the United Kingdom at a glance

As of Nov 6, 2026

44.8%Verified-email coverage

9.4Average contacts per company

1-10Median size (employees)

35.3%Largest-city concentration · London

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

208

11-50

51-200

201-500

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 303 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with the United Kingdom whose business descriptions match “infosec communications agencies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 1,279 professional contacts with verified work emails across the full matched dataset. 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 November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Infosec communications agencies by metro

Infosec communications agencies in London107

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “infosec communications agencies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many infosec communications agencies are there based in the United Kingdom?

RevenueBase identified 303 company matches for infosec communications agencies associated with the United Kingdom as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Brands2life tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most infosec communications agencies?

London leads with 107 company records, followed by Manchester (9) and Birmingham (8).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 1,279 professional contacts with verified work emails tracked across these 303 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 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 SmartSearch, 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.