Company lists · Data refreshed September 2026
Top 22 Network security consultants based in London, United Kingdom
RevenueBase identified 528 network security consultants headquartered in London, United Kingdom as of September 2026 and tracks 5,580 professional contacts across them, including 1,360 with verified work emails. London is the largest hub.
This list covers network security consultants headquartered in London, 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, how directly it supports the match, 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 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.
The 22 largest network security consultants based in London, United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 242 | ||||
“Obrela Security Industries is a global provider of cyber security services.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 2 | 126 | ||||
“We are TRPGLOBAL, your strategic partner in helping you with the complexities of risk management.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 3 | 123 | ||||
“Bulletproof is now part of WorkNest Secure.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 4 | 105 | ||||
“Cybersecurity specialists providing technology and telecoms solutions that gives you the leadership, experience and resilience you need to build and secure the future of work.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 5 | 99 | ||||
“OryxAlign creates true alignment that delivers the right outcomes for all.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 6 | 97 | ||||
“As an independent IT security specialist, Caretower provide comprehensive solutions to individual problems, thus allowing our recommendations to be unbiased.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 7 | 87 | ||||
“ITC Secure is an advisory-led cyber security services company.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 8 | White HAT An Epam CompanyPartial evidence | 77 | |||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 9 | 68 | ||||
“Sytel Reply is the Reply Company focused on Networks and Security.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 10 | 62 | ||||
“Cyro Cyber are your cyber security Guardians.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 11 | 60 | ||||
“We provide deep expertise with technical and business specialists to help clients secure and protect the UK.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 12 | 57 | ||||
“We deliver services in Cybersecurity, Application Security and DevOps and are trusted by some of the world’s leading brands to maximise the value of their security investments and…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 13 | 52 | ||||
“CyberOwl helps asset operators in the maritime and critical national infrastructure sectors gain visibility, cyber security and cyber compliance of systems on their distributed…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 14 | 52 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 15 | 44 | ||||
“CornerStone is an award winning, independent, security and digital building consulting firm with headquarters in the UK.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 16 | Secforce LTDPartial evidence | 39 | |||
“SECFORCE are vendor independent offensive security specialists providing effective business risk intelligence and strategic security consulting.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 17 | 32 | ||||
“Founded in 2006, Torrid Networks has been able to establish strong credentials in the area of cyber security products, research, consulting, managed services, education and staff…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 18 | 32 | ||||
“CYB3R Group, is a leading provider of comprehensive Cyber Security, IT and Communications Solutions.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 19 | 29 | ||||
“Cyber Rescue is a leading specialist in helping Boardroom Executives to measure, monitor and mitigate potential harm from cyber-attacks.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 20 | 29 | ||||
“Cyber security is the modern business' greatest risk.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 21 | 26 | ||||
“Our overarching aim is to safeguard your information so that you can focus on taking your business where you want it to go.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 22 | Nanjgel SolutionsPartial evidence | 24 | |||
“Nanjgel Solutions is focused on delivering the best IT security for businesses.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
Showing 22 of 528 network security consultants based in London, United Kingdom
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Network security consultants based in London, United Kingdom at a glance
As of Sep 5, 2026Companies by employee count
Email recency for this list is measured across the whole United Kingdom list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for London, over 528 companies.
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 network security consultants, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in London, United Kingdom whose own description of what they do matches “network security consultants”. Matching reads each company's description, not its industry code or its name.
- What we exclude
- Companies whose own description does not clearly place them among network security consultants, and records with no verified work email. Companies headquartered outside London 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 an evidence 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, 1,360 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.
Network security consultants by metro in the United Kingdom
- Network security consultants in London528
- Network security consultants in Manchester59
- Network security consultants in Birmingham29
Frequently asked
How many network security consultants are there based in London, United Kingdom?
RevenueBase identified 528 network security consultants headquartered in London, 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?
Obrela, headquartered in London, tops this list with the largest team on record.
Which city has the most network security consultants?
London leads with 528 headquartered companies, followed by Manchester (59) and Birmingham (29).
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 1,360 verified decision-maker contacts tracked across these 528 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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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.
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