Company lists · Data refreshed September 2026

Top 25 Industrial systems integrators based in the United Kingdom

Name: Industrial systems integrators based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 3, 2026 782 companies tracked

RevenueBase identified 782 industrial systems integrators headquartered in the United Kingdom as of September 2026 and tracks 14,924 professional contacts across them, including 5,611 with verified work emails and 1,045 with mobile numbers. London is the largest hub.

This list covers industrial systems integrators 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, how directly it supports the match, and when it was last checked. Data refreshed September 3, 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.

How to read this list HQ checked on every row Match evidence on every row Refreshed Sep 3, 2026 86% judged on-target in blind review

782Companies

14,924Contacts tracked

5,611Verified emails

1,045Mobile numbers

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The 25 largest industrial systems integrators based in the United Kingdom

Ranked by team size

Top 25 of 782 industrial systems integrators based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 3, 2026. Evidence rates how directly each company's own description names industrial systems integrators: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	Protec Fire And Security GroupStrong evidence	Nelson, United KingdomHQ checked Sep 3, 2026	501-1,000	504
	“Through our team of over 900 creative individuals, we've positioned ourselves as a respected force as a life safety systems integrator.” Source: company website · checked Sep 3, 2026
2	Trinity Fire & Security SystemsIndirect evidence	Exeter, United KingdomHQ checked Sep 3, 2026	501-1,000	385
	“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: company website · checked Sep 3, 2026
3	CapulaPartial evidence	Stone, United KingdomHQ checked Sep 3, 2026	201-500	350
	“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: company website · checked Sep 3, 2026
4	Kings Secure TechnologiesStrong evidence	Bradford, United KingdomHQ checked Sep 3, 2026	501-1,000	326
	“Kings Secure Technologies (KST) is a high-end, enterprise-level systems integrator.” Source: company website · checked Sep 3, 2026
5	MARCHIndirect evidence	Uk-Wide, United KingdomHQ checked Sep 3, 2026	1,001-5,000	279
	“We are March.” Source: company website · checked Sep 3, 2026
6	ITI GroupIndirect evidence	Sheffield, United KingdomHQ checked Sep 3, 2026	201-500	234
	“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: company website · checked Sep 3, 2026
7	BMSIStrong evidence	White Waltham Maidenhead, United KingdomHQ checked Sep 3, 2026	201-500	216
	“BMSI is the UK’s largest & leading Independent systems integrator of Building Energy Management Systems (BEMS).” Source: company website · checked Sep 3, 2026
8	Evolution Electronic Security Systems LTDStrong evidence	Marlow, United KingdomHQ checked Sep 3, 2026	201-500	202
	“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: company website · checked Sep 3, 2026
9	Maintel Azzurri CommunicationsStrong evidence	London, United KingdomHQ checked Sep 3, 2026	501-1,000	188
	“Maintel is a leading systems integrator and managed services provider, delivering effortless communications solutions to a broad spectrum of businesses in the UK and…” Source: company website · checked Sep 3, 2026
10	DPS GroupIndirect evidence	Glenrothes, United KingdomHQ checked Sep 3, 2026	51-200	139
	“Shaping the future, together.” Source: company website · checked Sep 3, 2026
11	CINOSStrong evidence	Frimley, United KingdomHQ checked Sep 3, 2026	51-200	117
	“Cinos is an industry-leading, agile, and innovative systems integrator.” Source: company website · checked Sep 3, 2026
12	European ElectroniqueStrong evidence	Witney, United KingdomHQ checked Sep 3, 2026	51-200	116
	“European Electronique is a leading UK systems Integrator, specialising in the delivery of secure technology platforms including Hybrid IT, Cyber Security and Networking…” Source: company website · checked Sep 3, 2026
13	Orbital GAS Systems Bilfinger NzeroPartial evidence	Cold Meece Swynnerton Stone, United KingdomHQ checked Sep 3, 2026	51-200	112
	“Over the past 30 years, Orbital has grown to become one of the UK's largest independent system integration organisations handling various contracts ranging in value.” Source: company website · checked Sep 3, 2026
14	Mpac LambertPartial evidence	Tadcaster, United KingdomHQ checked Sep 3, 2026	501-1,000	110
	“Lambert are specialists in bespoke automation, complex manufacturing processes & assembly systems.” Source: company website · checked Sep 3, 2026
15	PCE AutomationPartial evidence	Beccles, United KingdomHQ checked Sep 3, 2026	201-500	104
	“Formed in 1961, PCE Automation Ltd has established itself as an automation solutions provider for a wide range of product handling, assembling and testing systems with a worldwide…” Source: company website · checked Sep 3, 2026
16	EFT GroupIndirect evidence	Southport, United KingdomHQ checked Sep 3, 2026	51-200	103
	“We are EFT Group.” Source: company website · checked Sep 3, 2026
17	Total Integrated Solutions TIS LTDIndirect evidence	Mansfield, United KingdomHQ checked Sep 3, 2026	51-200	96
	“Better protect your people, places and spaces.” Source: company website · checked Sep 3, 2026
18	Adsyst Automation LimitedStrong evidence	Yateley, United KingdomHQ checked Sep 3, 2026	51-200	94
	“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: company website · checked Sep 3, 2026
19	OptilanStrong evidence	Royal Leamington Spa, United KingdomHQ checked Sep 3, 2026	201-500	94
	“Optilan is a leading independent security and communications systems integrator worldwide.” Source: company website · checked Sep 3, 2026
20	OALIndirect evidence	Peterborough, United KingdomHQ checked Sep 3, 2026	51-200	89
	“At OAL we help food manufacturers automate.” Source: company website · checked Sep 3, 2026
21	3p InnovationPartial evidence	Warwick, United KingdomHQ checked Sep 3, 2026	51-200	79
	“3P innovation develops customised automation solutions for pharmaceutical and industrial manufacturers facing complex production challenges.” Source: company website · checked Sep 3, 2026
22	Arlanis Reply UKIndirect evidence	London, United KingdomHQ checked Sep 3, 2026	11-50	77
	“Arlanis Reply is the Reply Group company specializing in Salesforce implementations.” Source: company website · checked Sep 3, 2026
23	IconsysStrong evidence	Telford, United KingdomHQ checked Sep 3, 2026	51-200	74
	“Established in 1987, iconsys is a leading UK power & automation solutions provider and systems integrator.” Source: company website · checked Sep 3, 2026
24	Bluesmith Information SystemsPartial evidence	Leeds, United KingdomHQ checked Sep 3, 2026	51-200	73
	“Bluesmith specialises in bespoke systems for Blue Chip and government clients.” Source: company website · checked Sep 3, 2026
25	Loop Technology LTDPartial evidence	Dorchester, United KingdomHQ checked Sep 3, 2026	51-200	71
	“Loop Technology are industrial automation and robotics specialists for the high value manufacturing sector including aerospace, defence, and renewable energy.” Source: company website · checked Sep 3, 2026

Showing 25 of 782 industrial systems integrators based in the United Kingdom

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Industrial systems integrators based in the United Kingdom at a glance

As of Sep 3, 2026

1-10Median size (employees)

LondonLargest hub · 80 HQs

1,045Contacts with mobile numbers

Sep 3, 2026Data refreshed

Companies by employee count

1-10

413

11-50

246

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Verified emails by last verification

0–30

31–60

474

61–90

3,309

90–180

1,812

180+

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 industrial systems integrators, 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 the United Kingdom whose own description of what they do matches “industrial systems integrators”. 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 industrial systems integrators, 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 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, 5,611 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 3, 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.

Industrial systems integrators by metro

Industrial systems integrators in London80

Frequently asked

How many industrial systems integrators are there based in the United Kingdom?

RevenueBase identified 782 industrial systems integrators 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 industrial systems integrators?

London leads with 80 headquartered companies, followed by Birmingham (20) and Manchester (12).

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 5,611 verified decision-maker contacts tracked across these 782 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 3, 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.