Company lists · Data refreshed September 2026

Top 25 Systems integration consultants based in the United Kingdom

Name: Systems integration consultants based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 6, 2026 1,382 companies tracked

RevenueBase identified 1,382 systems integration consultants headquartered in the United Kingdom as of September 2026 and tracks 14,170 professional contacts across them, including 6,067 with verified work emails and 746 with mobile numbers. London is the largest hub.

This list covers systems integration consultants 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 6, 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 6, 2026 86% judged on-target in blind review

1,382Companies

14,170Contacts tracked

6,067Verified emails

746Mobile numbers

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The 25 largest systems integration consultants based in the United Kingdom

Ranked by team size

Top 25 of 1,382 systems integration consultants based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 6, 2026. RevenueBase Smart Search rates how each company's information relates to 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	Protec Fire And Security Group	Partial evidence	Nelson, United KingdomHQ checked Sep 6, 2026	501-1,000	493 contacts →
	Partial evidence “Through our team of over 900 creative individuals, we've positioned ourselves as a respected force as a life safety systems integrator.” Source: RevenueBase Database · checked Sep 6, 2026
2	Zenzero	Indirect evidence	London, United KingdomHQ checked Sep 6, 2026	501-1,000	401 contacts →
	Indirect evidence “We believe successful businesses are underpinned by quality IT infrastructure.” Source: RevenueBase Database · checked Sep 6, 2026
3	Trinity Fire & Security Systems	Indirect evidence	Exeter, United KingdomHQ checked Sep 6, 2026	501-1,000	386 contacts →
	Indirect evidence “Trinity’s mission statement is simple - to provide high quality design, installation, commissioning and long term after care of Fire Detection, Fire Suppression, Life Safety and…” Source: RevenueBase Database · checked Sep 6, 2026
4	Capula	Strong evidence	Stone, United KingdomHQ checked Sep 6, 2026	201-500	351 contacts →
	Strong evidence “What we do \| With a focus on operational technology and digital transformation, Capula has been a leader in advanced system integration for decades; optimising efficiency &…” Source: RevenueBase Database · checked Sep 6, 2026
5	Kings Secure Technologies	Partial evidence	Bradford, United KingdomHQ checked Sep 6, 2026	501-1,000	326 contacts →
	Partial evidence “Kings Secure Technologies (KST) is a high-end, enterprise-level systems integrator.” Source: RevenueBase Database · checked Sep 6, 2026
6	Bechtle UK	Partial evidence	Chippenham, United KingdomHQ checked Sep 6, 2026	201-500	277 contacts →
	Partial evidence “Bechtle is your strategic partner for IT consultancy, procurement and implementation.” Source: RevenueBase Database · checked Sep 6, 2026
7	ITI Group	Indirect evidence	Sheffield, United KingdomHQ checked Sep 6, 2026	201-500	234 contacts →
	Indirect evidence “For organisations facing the compounding threats of ageing assets, a retiring workforce, and evolving cyber attacks, the status quo is no longer an option.” Source: RevenueBase Database · checked Sep 6, 2026
8	Waterstons	Indirect evidence	Durham, United KingdomHQ checked Sep 6, 2026	201-500	215 contacts →
	Indirect evidence “We are an IT business with a difference.” Source: RevenueBase Database · checked Sep 6, 2026
9	Evolution Electronic Security Systems LTD	Partial evidence	Marlow, United KingdomHQ checked Sep 6, 2026	201-500	200 contacts →
	Partial evidence “Founded in 1996 we have grown into one of the UK and Ireland’s leading qualified and accredited security and fire systems integrators, working across Europe to bring together…” Source: RevenueBase Database · checked Sep 6, 2026
10	Eappsys	Partial evidence	London, United KingdomHQ checked Sep 6, 2026	51-200	193 contacts →
	Partial evidence “eAppSys is a systems integrator that is focused exclusively on supporting the core enterprise application systems within Oracle On-Premise and Cloud Applications.” Source: RevenueBase Database · checked Sep 6, 2026
11	Platned	Indirect evidence	Gerrards Cross, United KingdomHQ checked Sep 6, 2026	201-500	190 contacts →
	Indirect evidence “Platned helps organisations simplify complex change and get more value from their enterprise technology investments.” Source: RevenueBase Database · checked Sep 6, 2026
12	DOWDS	Strong evidence	Ballymena, United KingdomHQ checked Sep 6, 2026	201-500	164 contacts →
	Strong evidence “With 45+ years in business, Dowds expertise spans the full lifecycle of complex build environments – from initial design and systems integration to final handover and beyond.” Source: RevenueBase Database · checked Sep 6, 2026
13	Charterhouse Group	Partial evidence	Aldgate, United KingdomHQ checked Sep 6, 2026	51-200	163 contacts →
	Partial evidence “Connecting You Across the UK and Worldwide Our team of accredited engineers and consultants cover a broad range of technologies, enabling us to deliver innovative solutions.” Source: RevenueBase Database · checked Sep 6, 2026
14	Cyberiam	Partial evidence	Chester, United KingdomHQ checked Sep 6, 2026	51-200	133 contacts →
	Partial evidence “CyberIAM provides the expertise needed for the design and implementation of complex Identity and access management systems.” Source: RevenueBase Database · checked Sep 6, 2026
15	Sisl Global	Partial evidence	Uxbridge, United KingdomHQ checked Sep 6, 2026	1,001-5,000	128 contacts →
	Partial evidence “SISL Infotech is a market-leading IT infrastructure reseller and systems integrator with operations in EMEA / NAM / LATAM / APAC - data centre & cloud solutions - network…” Source: RevenueBase Database · checked Sep 6, 2026
16	Opticoreit	Partial evidence	London, United KingdomHQ checked Sep 6, 2026	51-200	120 contacts →
	Partial evidence “OpticoreIT is an IT Consultancy founded in 2013 to bridge a gap in the market between the major IT services providers and the consultancy market.” Source: RevenueBase Database · checked Sep 6, 2026
17	CINOS	Partial evidence	Frimley, United KingdomHQ checked Sep 6, 2026	51-200	119 contacts →
	Partial evidence “Cinos is an industry-leading, agile, and innovative systems integrator.” Source: RevenueBase Database · checked Sep 6, 2026
18	European Electronique	Partial evidence	Eynsham, United KingdomHQ checked Sep 6, 2026	51-200	117 contacts →
	Partial evidence “European Electronique is a leading UK systems Integrator, specialising in the delivery of secure technology platforms including Hybrid IT, Cyber Security and Networking…” Source: RevenueBase Database · checked Sep 6, 2026
19	Avnet Integrated Emea Solutions	Partial evidence	Maidenhead, United KingdomHQ checked Sep 6, 2026	51-200	110 contacts →
	Partial evidence “Avnet Integrated is the consultancy and solutions division of Avnet.” Source: RevenueBase Database · checked Sep 6, 2026
20	EFT Group	Indirect evidence	Southport, United KingdomHQ checked Sep 6, 2026	51-200	102 contacts →
	Indirect evidence “We are EFT Group.” Source: RevenueBase Database · checked Sep 6, 2026
21	Total Integrated Solutions TIS LTD	Indirect evidence	Mansfield, United KingdomHQ checked Sep 6, 2026	51-200	94 contacts →
	Indirect evidence “Better protect your people, places and spaces.” Source: RevenueBase Database · checked Sep 6, 2026
22	Ramsac	Indirect evidence	Guildford, United KingdomHQ checked Sep 6, 2026	51-200	93 contacts →
	Indirect evidence “ramsac provide so much more than just IT support.” Source: RevenueBase Database · checked Sep 6, 2026
23	Adsyst Automation Limited	Partial evidence	Yateley, United KingdomHQ checked Sep 6, 2026	51-200	93 contacts →
	Partial evidence “As a System Integrator for over 35 years, Adsyst (Automation) Ltd has been providing complex Control Systems for Process Control, Automation and Telemetry to customers worldwide.” Source: RevenueBase Database · checked Sep 6, 2026
24	Twistedpair LTD	Indirect evidence	Portsmouth, United KingdomHQ checked Sep 6, 2026	51-200	83 contacts →
	Indirect evidence “Connecting people, places, and possibilities through transformative workplace technology.” Source: RevenueBase Database · checked Sep 6, 2026
25	KCP Network	Indirect evidence	Bracknell, United KingdomHQ checked Sep 6, 2026	51-200	81 contacts →
	Indirect evidence “KCP \| Network Solutions and Design \| Software Development \| Automation Since 2008 KCP built a legacy of trust with our global customers by becoming a leading provider of SMART…” Source: RevenueBase Database · checked Sep 6, 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: 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 systems integration consultants.
Partial evidence: Its own public description names part of 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 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 1,382 systems integration consultants based in the United Kingdom

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Systems integration consultants based in the United Kingdom at a glance

As of Sep 6, 2026

42.8%Verified-email coverage

5.3%Mobile-number coverage

10.3Average contacts per company

1-10Median size (employees)

26.8%Largest-city concentration · London

Sep 6, 2026Page data refreshed

Companies by employee count

1-10

882

11-50

341

51-200

126

201-500

501-1,000

1,001-5,000

10001+

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

5,6010–30

43831–60

261–90

290–180

24180+

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 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 the United Kingdom whose own description of what they do matches “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 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 systems integration consultants, 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, 6,067 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 6, 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.

Systems integration consultants 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 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 systems integration consultants are there based in the United Kingdom?

RevenueBase identified 1,382 systems integration consultants 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?

Protec Fire And Security Group, headquartered in Nelson, tops this list with the largest team on record.

Which city has the most systems integration consultants?

London leads with 370 headquartered companies, followed by Bristol (26) and Manchester (25).

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 6,067 verified decision-maker contacts tracked across these 1,382 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 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 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.