Company lists · Data refreshed September 2026

Top 14 Defense and security research organizations based in London, United Kingdom

Name: Defense and security research organizations based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 45 companies tracked

RevenueBase identified 45 defense and security research organizations headquartered in London, United Kingdom as of September 2026 and tracks 41,557 professional contacts across them, including 9,336 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers defense and security research organizations 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 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 28, 2026 86% judged on-target in blind review

45Companies

41,557Contacts tracked

9,336Verified emails

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The 14 largest defense and security research organizations based in London, United Kingdom

Ranked by team size

Top 14 of 45 defense and security research organizations based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to defense and security research organizations: 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	BAE Systems	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	10001+	39,449 contacts →
	Partial evidence “At BAE Systems, we help our customers to stay a step ahead when protecting people and national security, critical infrastructure and vital information.” Source: RevenueBase Database · checked Sep 28, 2026
2	Royal United Services Institute	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	313 contacts →
	Indirect evidence “The Royal United Services Institute (RUSI) is a unique institution, founded in 1831 by the Duke of Wellington, RUSI embodies nearly two centuries of forward thinking, free…” Source: RevenueBase Database · checked Sep 28, 2026
3	International Institute For Strategic Studies	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	233 contacts →
	Partial evidence “The International Institute for Strategic Studies helps the world understand and address global security challenges.” Source: RevenueBase Database · checked Sep 28, 2026
4	Saab UK	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	501-1,000	203 contacts →
	Indirect evidence “Technological excellence helping to keep Britain safe.” Source: RevenueBase Database · checked Sep 28, 2026
5	Defence IQ	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	88 contacts →
	Partial evidence “Established in 2001, Defence iQ has grown to become one of the world’s largest defence events and media organisations.” Source: RevenueBase Database · checked Sep 28, 2026
6	Anotherday	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	21 contacts →
	Strong evidence “AnotherDay is a new kind of defence & security consulting firm established to bring the power of effective intelligence and strategy to the challenge of safeguarding individuals…” Source: RevenueBase Database · checked Sep 28, 2026
7	Exsel Group	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	18 contacts →
	Partial evidence “The Exsel Group is a leading independent defence technology solutions company – providing engineering solutions, technology systems and support services to Defence and Industry…” Source: RevenueBase Database · checked Sep 28, 2026
8	Global Network On Extremism & Technology Gnet	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	13 contacts →
	Partial evidence “The Global Network on Extremism and Technology (GNET) is an academic research initiative backed by the Global Internet Forum to Counter Terrorism (GIFCT), an independent but…” Source: RevenueBase Database · checked Sep 28, 2026
9	Acubed IT	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	11 contacts →
	Strong evidence “At Acubed IT, we design and deliver secure, scalable, and innovative technology solutions across the National Security, Defence, and Public Sector ecosystems.” Source: RevenueBase Database · checked Sep 28, 2026
10	London Defence Conference	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	7 contacts →
	Strong evidence “The London Defence Conference is an annual event bringing together policymakers, military leaders, industry experts, and academics to discuss global security challenges and…” Source: RevenueBase Database · checked Sep 28, 2026
11	Transcend Consulting	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	1 contacts →
	Strong evidence “Transcend Consulting is an independent defence and national security advisory firm operating across NATO, government and other high-assurance environments.” Source: RevenueBase Database · checked Sep 28, 2026
12	Pivot Labs	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	1 contacts →
	Strong evidence “Supporting founders building around defence & security challenges across NATO 2.” Source: RevenueBase Database · checked Sep 28, 2026
13	Private Counsel LTD	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	1 contacts →
	Strong evidence “Defence and Security.” Source: RevenueBase Database · checked Sep 28, 2026
14	3ntt Group	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	1 contacts →
	Strong evidence “3NTT Group is a company that operates in the global Defense and Security sectors using high-tech instruments and methodologies.” 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: defense and security research organizations. 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 defense and security research organizations.
Partial evidence: Its own public description names part of defense and security research organizations, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name defense and security research organizations. 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 14 of 45 defense and security research organizations based in London, United Kingdom

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Defense and security research organizations based in London, United Kingdom at a glance

As of Sep 28, 2026

22.5%Verified-email coverage

923.5Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 45 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 defense and security research organizations, 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 London, United Kingdom whose own description of what they do matches “defense and security research organizations”. 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 defense and security research organizations), 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 defense and security research organizations, 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 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, 9,336 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.

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 defense and security research organizations, 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 defense and security research organizations are there based in London, United Kingdom?

RevenueBase identified 45 defense and security research organizations 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?

BAE Systems, headquartered in London, tops this list with the largest team on record.

Which city in the United Kingdom has the most defense and security research organizations?

London leads the United Kingdom with 45 headquartered companies, followed by Bristol (6) and Salisbury (5).

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 9,336 verified decision-maker contacts tracked across these 45 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.