Company lists · Data refreshed September 2026

Top 25 System integration agencies based in the United Kingdom

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

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 311 companies tracked

RevenueBase identified 311 system integration agencies headquartered in the United Kingdom as of September 2026 and tracks 4,007 professional contacts across them, including 1,148 with verified work emails. London is the largest hub.

This list covers system integration agencies 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 21, 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 21, 2026 86% judged on-target in blind review

311Companies

4,007Contacts tracked

1,148Verified emails

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The 25 largest system integration agencies based in the United Kingdom

Ranked by team size

Top 25 of 311 system integration agencies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to system integration agencies: 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	ITI Group	Indirect evidence	Sheffield, United KingdomHQ checked Sep 21, 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 21, 2026
2	Platned	Indirect evidence	Gerrards Cross, United KingdomHQ checked Sep 21, 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 21, 2026
3	Sisl Global	Partial evidence	Uxbridge, United KingdomHQ checked Sep 21, 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 21, 2026
4	Cogniz Consultancy Limited	Indirect evidence	Middlesex, United KingdomHQ checked Sep 21, 2026	11-50	125 contacts →
	Indirect evidence “COGNIZ is an emerging IT solutions company delivering technical services, solutions and support for organisations ranging across a variety of sectors.” Source: RevenueBase Database · checked Sep 21, 2026
5	CINOS	Partial evidence	Frimley, United KingdomHQ checked Sep 21, 2026	51-200	119 contacts →
	Partial evidence “Cinos is an industry-leading, agile, and innovative systems integrator.” Source: RevenueBase Database · checked Sep 21, 2026
6	European Electronique	Partial evidence	Eynsham, United KingdomHQ checked Sep 21, 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 21, 2026
7	Total Integrated Solutions TIS LTD	Indirect evidence	Mansfield, United KingdomHQ checked Sep 21, 2026	51-200	94 contacts →
	Indirect evidence “Better protect your people, places and spaces.” Source: RevenueBase Database · checked Sep 21, 2026
8	Twistedpair LTD	Indirect evidence	Portsmouth, United KingdomHQ checked Sep 21, 2026	51-200	83 contacts →
	Indirect evidence “Connecting people, places, and possibilities through transformative workplace technology.” Source: RevenueBase Database · checked Sep 21, 2026
9	Infoteck Solutions	Partial evidence	Holborn, United KingdomHQ checked Sep 21, 2026	51-200	72 contacts →
	Partial evidence “Infoteck Solutions: Empowering Integration and Automation Welcome to Infoteck Solutions, your trusted partner in seamless integration and efficient automation.” Source: RevenueBase Database · checked Sep 21, 2026
10	Forfusion LTD	Indirect evidence	Newcastle Upon Tyne, United KingdomHQ checked Sep 21, 2026	51-200	63 contacts →
	Indirect evidence “Empowering through digital transformation.” Source: RevenueBase Database · checked Sep 21, 2026
11	Diegesis Limited	Strong evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	52 contacts →
	Strong evidence “Diegesis is a business technology and IT systems integration company that specialises in Decision Support Solutions.” Source: RevenueBase Database · checked Sep 21, 2026
12	Pace Integration	Strong evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	47 contacts →
	Strong evidence “Pace Integration is a unique technology consultancy that solves your integration challenge – focused on enterprise systems integration strategy, architecture and design that is…” Source: RevenueBase Database · checked Sep 21, 2026
13	Kinetic IT LTD	Indirect evidence	Erith, United KingdomHQ checked Sep 21, 2026	11-50	47 contacts →
	Indirect evidence “It’s all about making a difference The world of IT is an ever-evolving industry with new developments in technology emerging constantly.” Source: RevenueBase Database · checked Sep 21, 2026
14	Ajar Technology	Partial evidence	Brentford, United KingdomHQ checked Sep 21, 2026	11-50	46 contacts →
	Partial evidence “Ajar Technology is a successful and highly regarded end-to-end systems integrator with bases in Brentford and Bolton.” Source: RevenueBase Database · checked Sep 21, 2026
15	Holker IT	Partial evidence	Burnley, United KingdomHQ checked Sep 21, 2026	11-50	39 contacts →
	Partial evidence “At Holker IT our aim is to improve our clients’ businesses through strategic advice, implementation and on-going support of IT systems and processes, from single to multi-server…” Source: RevenueBase Database · checked Sep 21, 2026
16	Phoenix Trescray	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	39 contacts →
	Indirect evidence “We are a leading IT installation company offering complete infrastructure solutions within data centre and commercial sectors.” Source: RevenueBase Database · checked Sep 21, 2026
17	Astro Communications LTD	Indirect evidence	Dartford, United KingdomHQ checked Sep 21, 2026	11-50	39 contacts →
	Indirect evidence “Astro Communications are experts in solving business challenges through the design, deployment and management of end-to-end communications and networking solutions.” Source: RevenueBase Database · checked Sep 21, 2026
18	Lan2lan	Strong evidence	Leatherhead, United KingdomHQ checked Sep 21, 2026	11-50	39 contacts →
	Strong evidence “LAN2LAN is a specialist systems integration, installation and project management organisation focused on driving technologically innovative solutions that deliver intelligent…” Source: RevenueBase Database · checked Sep 21, 2026
19	Stingray LTD	Indirect evidence	Reading, United KingdomHQ checked Sep 21, 2026	51-200	37 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
20	Bespoke IT Solutions UK	Indirect evidence	Fleet, United KingdomHQ checked Sep 21, 2026	11-50	34 contacts →
	Indirect evidence “When IT feels hard work, frustrating, or unreliable, it slows everything down.” Source: RevenueBase Database · checked Sep 21, 2026
21	Manifest Software Solutions	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	28 contacts →
	Indirect evidence “Manifest Software Solutions (MSS) integrates anything with everything.” Source: RevenueBase Database · checked Sep 21, 2026
22	Bestpath	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	26 contacts →
	Indirect evidence “BestPath provides next generation, easy to use IT solutions for businesses of all sizes, from FTSE 100 companies to start-ups.” Source: RevenueBase Database · checked Sep 21, 2026
23	Optimal Industrial Automation	Indirect evidence	Bristol & Darlington, United KingdomHQ checked Sep 21, 2026	11-50	26 contacts →
	Indirect evidence “Optimal are now SciY!” Source: RevenueBase Database · checked Sep 21, 2026
24	Newworldtech NWT	Indirect evidence	Brighton, United KingdomHQ checked Sep 21, 2026	51-200	25 contacts →
	Indirect evidence “NWT have been in business for over 7 years and our complete service offerings encompass all aspects of technology.” Source: RevenueBase Database · checked Sep 21, 2026
25	Italik	Indirect evidence	Wetherby, United KingdomHQ checked Sep 21, 2026	11-50	22 contacts →
	Indirect evidence “Italik is a trusted independent IT consultancy with over 25 years of experience helping medium and large organisations across the UK modernise, secure and optimise their…” Source: RevenueBase Database · checked Sep 21, 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: system integration agencies. 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 system integration agencies.
Partial evidence: Its own public description names part of system integration agencies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name system integration agencies. 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 311 system integration agencies based in the United Kingdom

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System integration agencies based in the United Kingdom at a glance

As of Sep 21, 2026

28.6%Verified-email coverage

12.9Average contacts per company

1-10Median size (employees)

27.7%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

169

11-50

104

51-200

201-500

1,001-5,000

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 311 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 system integration agencies, 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 “system integration agencies”. 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 system integration agencies), 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 system integration agencies, 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, 1,148 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 21, 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.

System integration agencies by metro

System integration agencies in London86

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 system integration agencies, 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 system integration agencies are there based in the United Kingdom?

RevenueBase identified 311 system integration agencies 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?

ITI Group, headquartered in Sheffield, tops this list with the largest team on record.

Which city has the most system integration agencies?

London leads with 86 headquartered companies, followed by Manchester (8) and Birmingham (6).

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 1,148 verified decision-maker contacts tracked across these 311 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 21, 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.