Company lists · Data refreshed September 2026

Top 25 Federal enterprise integrators based in London, United Kingdom

Name: Federal enterprise integrators 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 151 companies tracked

RevenueBase identified 151 federal enterprise integrators headquartered in London, United Kingdom as of September 2026 and tracks 2,192 professional contacts across them, including 665 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers federal enterprise integrators 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

151Companies

2,192Contacts tracked

665Verified emails

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The 25 largest federal enterprise integrators based in London, United Kingdom

Ranked by team size

Top 25 of 151 federal enterprise integrators 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 federal enterprise integrators: 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	Flat Rock Technology	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	231 contacts →
	Indirect evidence “Since 2008, Flat Rock Technology, a software engineering, SI, Cloud DevOps, Cyber Security, and Customer Experience (CX) company, has been at the forefront of providing innovative…” Source: RevenueBase Database · checked Sep 28, 2026
2	Conosco	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	105 contacts →
	Indirect evidence “Cybersecurity specialists providing technology and telecoms solutions that gives you the leadership, experience and resilience you need to build and secure the future of work.” Source: RevenueBase Database · checked Sep 28, 2026
3	Oryxalign	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	99 contacts →
	Indirect evidence “OryxAlign creates true alignment that delivers the right outcomes for all.” Source: RevenueBase Database · checked Sep 28, 2026
4	Constor Solutions	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	87 contacts →
	Indirect evidence “At Constor Solutions, we believe that technology is the backbone of a successful business.” Source: RevenueBase Database · checked Sep 28, 2026
5	Principle ONE	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	78 contacts →
	Indirect 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 28, 2026
6	Baseel Partners	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1,001-5,000	78 contacts →
	Indirect evidence “We offer a broad portfolio of IT and consulting services covering Governance and Strategy, Cloud, Data, Cybersecurity, Infrastructure and Applications, Managed IT and Security.” Source: RevenueBase Database · checked Sep 28, 2026
7	6point6 Part Of Accenture	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	68 contacts →
	Indirect evidence “6point6 drives the right change in an organisation through the positive impact of technology.” Source: RevenueBase Database · checked Sep 28, 2026
8	Diegesis Limited	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	52 contacts →
	Indirect evidence “Diegesis is a business technology and IT systems integration company that specialises in Decision Support Solutions.” Source: RevenueBase Database · checked Sep 28, 2026
9	Pace Integration	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	47 contacts →
	Partial 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 28, 2026
10	R3 Digital	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	37 contacts →
	Partial evidence “R3 Digital is a Systems Integrator and Salesforce Platinum (Summit) Consulting Partner that specialises in Health and Life Sciences.” Source: RevenueBase Database · checked Sep 28, 2026
11	Cloudcoco PLC	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	32 contacts →
	Indirect evidence “CloudCoCo helps organisations modernise, secure and scale their IT with services designed for the way businesses work now.” Source: RevenueBase Database · checked Sep 28, 2026
12	Cyb3r	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	32 contacts →
	Indirect evidence “CYB3R Group, is a leading provider of comprehensive Cyber Security, IT and Communications Solutions.” Source: RevenueBase Database · checked Sep 28, 2026
13	Stealth IT Consulting	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	24 contacts →
	Indirect evidence “We are a Digital, Data and Cloud technology consultancy, specialising in delivering solutions to clients across financial services, government, management consulting/outsourcing…” Source: RevenueBase Database · checked Sep 28, 2026
14	Pstg LTD	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	23 contacts →
	Indirect evidence “PSTG is a market-leading technology services and support company offering a breadth of technical expertise and strategic technology partnerships based in London.” Source: RevenueBase Database · checked Sep 28, 2026
15	Celon Group	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	19 contacts →
	Indirect evidence “At Celon Group Limited, we are a dedicated team offering an array of technology services, including advanced Cybersecurity services, expert Consultancy, comprehensive Managed…” Source: RevenueBase Database · checked Sep 28, 2026
16	Digital Devices LTD IT Tailored To Your Needs	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	19 contacts →
	Indirect evidence “Working in close partnership with both government and corporate sectors since 2006, DD would go above and beyond the norm of standard IT to ensure our client gets full exposure to…” Source: RevenueBase Database · checked Sep 28, 2026
17	Igxglobal	Partial evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
18	Kumoco	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	18 contacts →
	Indirect evidence “Welcome to Kumoco.” Source: RevenueBase Database · checked Sep 28, 2026
19	Sinevis	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	17 contacts →
	Indirect evidence “We are a leading cybersecurity services organization with more than a decade of proven expertise in consulting, solution implementation and managed services.” Source: RevenueBase Database · checked Sep 28, 2026
20	Vits LTD	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	16 contacts →
	Indirect evidence “Your Trusted Partner in Cybersecurity & 360 IT Support Founded in 2004, VITS has built a reputation for protecting businesses across the globe with robust, responsive, and…” Source: RevenueBase Database · checked Sep 28, 2026
21	Grillatech Limited	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	14 contacts →
	Indirect evidence “GrillaTech is your IT and cyber-security services partner, working exclusively in the IT Channel delivering projects, seamlessly.” Source: RevenueBase Database · checked Sep 28, 2026
22	Alchem Technologies LTD	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	14 contacts →
	Partial 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 28, 2026
23	Accordant Solutions LTD	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	14 contacts →
	Indirect evidence “At Accordant we understand the changing needs of business IT.” Source: RevenueBase Database · checked Sep 28, 2026
24	Sylversys	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	14 contacts →
	Indirect 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 28, 2026
25	Adaptivity	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	14 contacts →
	Indirect evidence “Adaptivity is a specialist systems integration consultancy.” 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: federal enterprise integrators. 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 federal enterprise integrators.
Partial evidence: Its own public description names part of federal enterprise integrators, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name federal enterprise integrators. 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 151 federal enterprise integrators based in London, United Kingdom

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Federal enterprise integrators based in London, United Kingdom at a glance

As of Sep 28, 2026

30.3%Verified-email coverage

14.5Average 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

5,001-10,000

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 151 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 federal enterprise integrators, 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 “federal enterprise integrators”. 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 federal enterprise integrators), 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 federal enterprise integrators, 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, 665 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 federal enterprise integrators, 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 federal enterprise integrators are there based in London, United Kingdom?

RevenueBase identified 151 federal enterprise integrators 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?

Flat Rock Technology, headquartered in London, tops this list with the largest team on record.

Which city in the United Kingdom has the most federal enterprise integrators?

London leads the United Kingdom with 151 headquartered companies, followed by Manchester (10) and Birmingham (9).

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 665 verified decision-maker contacts tracked across these 151 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.