Company lists · Data refreshed September 2026

Top 25 Cybersecurity digital marketing agencies based in the United Kingdom

Name: Cybersecurity digital marketing agencies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 2,741 companies tracked

RevenueBase identified 2,741 cybersecurity digital marketing agencies headquartered in the United Kingdom as of September 2026 and tracks 17,200 professional contacts across them, including 4,006 with verified work emails and 1,469 with mobile numbers. London is the largest hub.

This list covers cybersecurity digital marketing agencies headquartered in the United Kingdom, 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 29, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 29, 2026 86% judged on-target in blind review

2,741Companies

17,200Contacts tracked

4,006Verified emails

1,469Mobile numbers

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The 25 largest cybersecurity digital marketing agencies based in the United Kingdom

Ranked by team size

Top 25 of 2,741 cybersecurity digital marketing agencies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to cybersecurity digital marketing agencies: 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	Securityhq	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	501-1,000	502 contacts →
	Partial evidence “SecurityHQ, a global cybersecurity company pioneering Security Performance Engineering for stronger operational performance and resilience.” Source: RevenueBase Database · checked Sep 29, 2026
2	BIG Group	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	177 contacts →
	Partial evidence “Founded in 1991, with offices in Amsterdam, Bath, Dubai and London our award-winning employee-owned company has consistently ranked as one of the UK's leading independent digital…” Source: RevenueBase Database · checked Sep 29, 2026
3	Cyberfort	Indirect evidence	Thatcham, United KingdomHQ checked Sep 29, 2026	51-200	159 contacts →
	Indirect evidence “At Cyberfort we are passionate about the cyber security services we deliver for our customers which keeps their people, data, systems and technology infrastructure secure…” Source: RevenueBase Database · checked Sep 29, 2026
4	Investis Digital	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	501-1,000	158 contacts →
	Partial evidence “IDX (formerly Investis Digital) specializes in elevating companies and brands and maximizing technology to build strong, relatable, and authentic connections with their audiences.” Source: RevenueBase Database · checked Sep 29, 2026
5	Performanta	Partial evidence	Maidenhead, United KingdomHQ checked Sep 29, 2026	51-200	156 contacts →
	Partial evidence “Performanta is a global cybersecurity and data risk management company dedicated to protecting people where data matters most.” Source: RevenueBase Database · checked Sep 29, 2026
6	Bulletproof Cyber Security	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	123 contacts →
	Indirect evidence “Bulletproof is now part of WorkNest Secure.” Source: RevenueBase Database · checked Sep 29, 2026
7	Finixio	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	96 contacts →
	Partial evidence “Finixio is UK based remote first Marketing & SEO Agency helping clients all over the world.” Source: RevenueBase Database · checked Sep 29, 2026
8	Wavenet Cyberguard	Indirect evidence	Stourport-on-severn, United KingdomHQ checked Sep 29, 2026	201-500	86 contacts →
	Indirect evidence “CyberGuard Technologies is the security division of Wavenet.” Source: RevenueBase Database · checked Sep 29, 2026
9	Brainsouls	Indirect evidence	Birmingham, United KingdomHQ checked Sep 29, 2026	51-200	82 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026
10	Foregenix	Indirect evidence	Swindon, United KingdomHQ checked Sep 29, 2026	51-200	80 contacts →
	Indirect evidence “When your business relies on security, compliance and a strong reputation for taking care of your customers, you need a partner that understands your ethos, your challenges and…” Source: RevenueBase Database · checked Sep 29, 2026
11	Reliance Cyber	Indirect evidence	Waterloo, United KingdomHQ checked Sep 29, 2026	51-200	80 contacts →
	Indirect evidence “At Reliance Cyber, we believe in truly partnering with our customers.” Source: RevenueBase Database · checked Sep 29, 2026
12	Stickyeyes	Partial evidence	Leeds, United KingdomHQ checked Sep 29, 2026	201-500	77 contacts →
	Partial evidence “Search Marketing \| Content \| Strategy Delivered by passionate people.” Source: RevenueBase Database · checked Sep 29, 2026
13	White HAT An Epam Company	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	77 contacts →
	Indirect evidence “White Hat, part of the EPAM group, is an award-winning cyber intelligence and offensive security company that leverages an attacker’s perspective to shape innovative, proactive…” Source: RevenueBase Database · checked Sep 29, 2026
14	77agency	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	64 contacts →
	Partial evidence “We are an award-winning full-service digital agency, part of Jakala group with 1,800 employees across 16 countries around the world.” Source: RevenueBase Database · checked Sep 29, 2026
15	Stripe OLT	Indirect evidence	Bristol, United KingdomHQ checked Sep 29, 2026	51-200	63 contacts →
	Indirect evidence “From our offices in London, Bristol, and Manchester, Stripe OLT delivers cutting-edge cyber security and IT services to support and protect organisations in an ever-changing…” Source: RevenueBase Database · checked Sep 29, 2026
16	Purecontent	Partial evidence	Norwich, United KingdomHQ checked Sep 29, 2026	11-50	63 contacts →
	Partial evidence “PureContent is a full-service marketing agency that provides everything your business needs to create impactful, results-driven marketing campaigns.” Source: RevenueBase Database · checked Sep 29, 2026
17	Sleeping Giant Media	Strong evidence	Folkestone, United KingdomHQ checked Sep 29, 2026	51-200	60 contacts →
	Strong evidence “Sleeping Giant Media is an award-winning digital marketing agency providing digital marketing services for businesses that wish to grow online.” Source: RevenueBase Database · checked Sep 29, 2026
18	Icopify	Strong evidence	Liverpool, United KingdomHQ checked Sep 29, 2026	11-50	60 contacts →
	Strong evidence “Welcome to icopify, your one-stop shop for digital marketing solutions.” Source: RevenueBase Database · checked Sep 29, 2026
19	Make Agency	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	58 contacts →
	Partial evidence “Make is one of the UK's fastest-growing Digital Agencies, with a growing team of 50 - servicing clients including IBM, Asana, Eventbrite, Soldo, Campari, Clearpay, Disney…” Source: RevenueBase Database · checked Sep 29, 2026
20	Edirect	Indirect evidence	Bournemouth, United KingdomHQ checked Sep 29, 2026	11-50	54 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026
21	Hexegic	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	52 contacts →
	Indirect evidence “At Hexegic we are not just passionate about protecting data through our Cyber services we are passionate about helping companies release the potential of the data they hold…” Source: RevenueBase Database · checked Sep 29, 2026
22	Profiletree	Indirect evidence	Belfast, United KingdomHQ checked Sep 29, 2026	51-200	51 contacts →
	Indirect evidence “A leading web design and website development company in Belfast, serving clients across Northern Ireland, Ireland, UK and the rest of the world.” Source: RevenueBase Database · checked Sep 29, 2026
23	Unity Online	Indirect evidence	Needham Market, United KingdomHQ checked Sep 29, 2026	51-200	50 contacts →
	Indirect evidence “At Unity Online, we exist to help businesses of all shapes and sizes achieve real success online.” Source: RevenueBase Database · checked Sep 29, 2026
24	Stellar Search	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	48 contacts →
	Strong evidence “We're a strategic digital marketing agency specialising in Paid Search, SEO, Google Shopping, Amazon and Social.” Source: RevenueBase Database · checked Sep 29, 2026
25	Firstfound	Partial evidence	Manchester, United KingdomHQ checked Sep 29, 2026	11-50	47 contacts →
	Partial evidence “Since FirstFound has helped thousands of customers to succeed in the digital world.” Source: RevenueBase Database · checked Sep 29, 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: cybersecurity digital marketing agencies. 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 cybersecurity digital marketing agencies.
Partial evidence: Its own public description names part of cybersecurity digital marketing agencies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity digital marketing agencies. 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 2,741 cybersecurity digital marketing agencies based in the United Kingdom

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Cybersecurity digital marketing agencies based in the United Kingdom at a glance

As of Sep 29, 2026

23.3%Verified-email coverage

8.5%Mobile-number coverage

6.3Average contacts per company

1-10Median size (employees)

32.7%Largest-city concentration · London

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

1,955

11-50

664

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 32.0d

1,7000–30

2,15331–60

12561–90

490–180

24180+

Company record updated

Median 94.0d

00–30

1,73931–60

6,11061–90

8,23090–180

1,121180+

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 cybersecurity digital marketing agencies, 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 Kingdom whose own description of what they do matches “cybersecurity digital marketing agencies”. 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 cybersecurity digital marketing agencies), 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 cybersecurity digital marketing agencies, and records with no verified work email. Companies headquartered outside United Kingdom 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, 4,006 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 29, 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.

Cybersecurity digital marketing agencies by metro

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 cybersecurity digital marketing agencies, 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 cybersecurity digital marketing agencies are there based in the United Kingdom?

RevenueBase identified 2,741 cybersecurity digital marketing agencies headquartered in the United Kingdom 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?

Securityhq, headquartered in Gb, tops this list with the largest team on record.

Which city has the most cybersecurity digital marketing agencies?

London leads with 895 headquartered companies, followed by Manchester (106) and Birmingham (85).

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 4,006 verified decision-maker contacts tracked across these 2,741 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 29, 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.