Company lists · Data refreshed September 2026

Top 25 Defense systems integration consultants based in London, United Kingdom

Name: Defense systems integration consultants based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 10, 2026 69 companies tracked

RevenueBase identified 69 defense systems integration consultants headquartered in London, United Kingdom as of September 2026 and tracks 570 professional contacts across them, including 269 with verified work emails and 37 with mobile numbers. London is the largest hub.

This list covers defense systems integration 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 10, 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 10, 2026 86% judged on-target in blind review

69Companies

570Contacts tracked

269Verified emails

37Mobile numbers

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The 25 largest defense systems integration consultants based in London, United Kingdom

Ranked by team size

Top 25 of 69 defense systems integration consultants based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 10, 2026. RevenueBase Smart Search rates how each company's information relates to defense systems integration consultants: 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	Principle ONE	Partial evidence	London, United KingdomHQ checked Sep 10, 2026	51-200	78 contacts →
	Partial evidence “Principle One provides Systems Engineering, Architecture and Business Consulting services within the Law Enforcement, National Security, Health and wider public sector.” Source: RevenueBase Database · checked Sep 10, 2026
2	Daintta	Indirect evidence	London, United KingdomHQ checked Sep 10, 2026	51-200	60 contacts →
	Indirect evidence “We provide deep expertise with technical and business specialists to help clients secure and protect the UK.” Source: RevenueBase Database · checked Sep 10, 2026
3	Commercis	Indirect evidence	London, United KingdomHQ checked Sep 10, 2026	51-200	33 contacts →
	Indirect evidence “With over three decades of experience in the communications and technology sector, Commercis has established itself as a trusted leader in delivering global connectivity…” Source: RevenueBase Database · checked Sep 10, 2026
4	Principle Networks	Indirect evidence	London, United KingdomHQ checked Sep 10, 2026	11-50	24 contacts →
	Indirect evidence “Principle Networks works with commercial and regulated organisations to reduce cyber risk and cost by simplifying security and network architecture.” Source: RevenueBase Database · checked Sep 10, 2026
5	Formation Tech	Indirect evidence	London, United KingdomHQ checked Sep 10, 2026	11-50	22 contacts →
	Indirect evidence “Specialsing in cybersecurity, networks, voice and video, we're on a mission to transform workspaces and deliver exceptional outcomes for our clients.” Source: RevenueBase Database · checked Sep 10, 2026
6	NGS Next Generation Security	Indirect evidence	London, United KingdomHQ checked Sep 10, 2026	11-50	20 contacts →
	Indirect evidence “Formed in 2018, NGS (UK) Ltd are independent, Next Generation Security trusted advisors, providing all-encompassing solutions from the perimeter to the endpoint.” Source: RevenueBase Database · checked Sep 10, 2026
7	Igxglobal	Partial evidence	London, United KingdomHQ checked Sep 10, 2026	1,001-5,000	18 contacts →
	Partial evidence “IGXGlobal is a technology systems integrator at the forefront of digital transformation.” Source: RevenueBase Database · checked Sep 10, 2026
8	Exsel Group	Strong evidence	London, United KingdomHQ checked Sep 10, 2026	51-200	18 contacts →
	Strong 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 10, 2026
9	Shield Reply	Partial evidence	London, United KingdomHQ checked Sep 10, 2026	11-50	17 contacts →
	Partial evidence “Shield Reply specialises in driving technology-led transformational change for Defence and Security customers through the design and delivery of cloud-based services and solutions…” Source: RevenueBase Database · checked Sep 10, 2026
10	Alchem Technologies LTD	Strong evidence	London, United KingdomHQ checked Sep 10, 2026	1-10	14 contacts →
	Strong evidence “Alchem is a data and systems integrator providing high-end technical capabilities in the national security, defence, and critical infrastructure sectors.” Source: RevenueBase Database · checked Sep 10, 2026
11	Sylversys	Partial evidence	London, United KingdomHQ checked Sep 10, 2026	51-200	14 contacts →
	Partial evidence “SYLVERSYS is a solutions integration firm with a specialty in providing secure computer and network products/solutions for businesses and organizations in the private and public…” Source: RevenueBase Database · checked Sep 10, 2026
12	Adaptivity	Strong evidence	London, United KingdomHQ checked Sep 10, 2026	11-50	14 contacts →
	Strong evidence “Adaptivity is a specialist systems integration consultancy.” Source: RevenueBase Database · checked Sep 10, 2026
13	Pxosys	Partial evidence	London, United KingdomHQ checked Sep 10, 2026	11-50	9 contacts →
	Partial evidence “Pxosys is a Digital Systems Integrator and Solutions Provider.” Source: RevenueBase Database · checked Sep 10, 2026
14	Ansador Fire & Security	Partial evidence	London, United KingdomHQ checked Sep 10, 2026	51-200	6 contacts →
	Partial evidence “Ansador Ltd has been privately owned since it was founded in 1982, providing system solutions to corporate and global clients across EMEA.” Source: RevenueBase Database · checked Sep 10, 2026
15	Intes UK	Partial evidence	London, United KingdomHQ checked Sep 10, 2026	1-10	5 contacts →
	Partial evidence “London based security systems integrator presently engaged on some of the most existing London landmark buildings.” Source: RevenueBase Database · checked Sep 10, 2026
16	Alchemise	Indirect evidence	London, United KingdomHQ checked Sep 10, 2026	11-50	4 contacts →
	Indirect evidence “At Alchemise, we transform complexity into clarity.” Source: RevenueBase Database · checked Sep 10, 2026
17	RSV Solutions	Indirect evidence	London, United KingdomHQ checked Sep 10, 2026	11-50	4 contacts →
	Indirect evidence “At RSV Solutions, we understand the challenges of thriving in today's digital landscape.” Source: RevenueBase Database · checked Sep 10, 2026
18	I15 Limited	Partial evidence	London, United KingdomHQ checked Sep 10, 2026	1-10	3 contacts →
	Partial evidence “i15 is a consultancy, and solutions partner, founded by a dedicated group of IT professionals with a collective 80+ year track record of successfully designing, engineering…” Source: RevenueBase Database · checked Sep 10, 2026
19	NLP Consult LTD	Partial evidence	London, United KingdomHQ checked Sep 10, 2026	1-10	3 contacts →
	Partial evidence “NLP Consult Ltd offer bespoke Design, Project Management, Supply Chain Development, Commissioning and Delivery of Integrated Systems in compliance with industry standards.” Source: RevenueBase Database · checked Sep 10, 2026
20	Sesseto Limited	Partial evidence	London, United KingdomHQ checked Sep 10, 2026	11-50	2 contacts →
	Partial evidence “Good security consultants are difficult to find, expensive to employ and hard to keep, but we believe that your business doesn’t have to incur a high cost of delivery in order to…” Source: RevenueBase Database · checked Sep 10, 2026
21	Rheinberry	Indirect evidence	London, United KingdomHQ checked Sep 10, 2026	1-10	2 contacts →
	Indirect evidence “Architecture Without Illusion.” Source: RevenueBase Database · checked Sep 10, 2026
22	MC Engineered Solutions LTD	Partial evidence	London, United KingdomHQ checked Sep 10, 2026	1-10	2 contacts →
	Partial evidence “MC Engineered Solutions Ltd are a leading Fire and Security Systems integrator specializing in assessing risk and designing suitable solutions for every application.” Source: RevenueBase Database · checked Sep 10, 2026
23	Anglesey Associates LTD	Indirect evidence	London, United KingdomHQ checked Sep 10, 2026	1-10	2 contacts →
	Indirect evidence “We support US, Canadian and UK business with complex projects, ranging from creating new tools and strategies to aid business development through to detailed product analysis and…” Source: RevenueBase Database · checked Sep 10, 2026
24	Stackcrafters	Strong evidence	London, United KingdomHQ checked Sep 10, 2026	1-10	1 contacts →
	Strong evidence “Stackcrafters provide consultancy and contract services for software systems.” Source: RevenueBase Database · checked Sep 10, 2026
25	Security Strategy And Solutions	Indirect evidence	London, United KingdomHQ checked Sep 10, 2026	1-10	1 contacts →
	Indirect evidence “SS & S has been established to provide integrated security solutions in response to ever-changing threats and needs.” Source: RevenueBase Database · checked Sep 10, 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 systems integration consultants. 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 systems integration consultants.
Partial evidence: Its own public description names part of defense systems integration consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name defense systems integration consultants. 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 69 defense systems integration consultants based in London, United Kingdom

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Defense systems integration consultants based in London, United Kingdom at a glance

As of Sep 10, 2026

47.2%Verified-email coverage

6.5%Mobile-number coverage

8.3Average contacts per company

1-10Median size (employees)

98.6%Largest-city concentration · London

Sep 10, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

1,001-5,000

Freshness & accuracy

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

Email last verified

Median 12.0d

2460–30

2231–60

061–90

090–180

1180+

Company record updated

Median 62.0d

00–30

25131–60

21261–90

6490–180

43180+

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 systems integration consultants, 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 systems integration consultants”. 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 systems integration consultants), 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 systems integration 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 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, 269 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 10, 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.

Defense systems integration consultants by metro in the United Kingdom

Defense systems integration consultants in London68

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 systems integration consultants, 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 systems integration consultants are there based in London, United Kingdom?

RevenueBase identified 69 defense systems integration 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?

Principle ONE, headquartered in London, tops this list with the largest team on record.

Which city has the most defense systems integration consultants?

London leads with 68 headquartered companies, followed by Bristol (10) and Manchester (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 269 verified decision-maker contacts tracked across these 69 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 10, 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.