Company lists · Data refreshed September 2026

Top 25 Application modernization consulting firms based in the United Kingdom

Name: Application modernization consulting firms 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 1,381 companies tracked

RevenueBase identified 1,381 application modernization consulting firms headquartered in the United Kingdom as of September 2026 and tracks 16,062 professional contacts across them, including 4,056 with verified work emails. London is the largest hub.

This list covers application modernization consulting firms 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

1,381Companies

16,062Contacts tracked

4,056Verified emails

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The 25 largest application modernization consulting firms based in the United Kingdom

Ranked by team size

Top 25 of 1,381 application modernization consulting firms 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 application modernization consulting firms: 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	PMC	Partial evidence	Abingdon, United KingdomHQ checked Sep 21, 2026	501-1,000	1,417 contacts →
	Partial evidence “PMC combines consulting with expert software engineering and 24x7x365 managed services to deliver high-quality technology services and solutions across retail, D2C, and broader…” Source: RevenueBase Database · checked Sep 21, 2026
2	Node4	Indirect evidence	Derby, United KingdomHQ checked Sep 21, 2026	1,001-5,000	628 contacts →
	Indirect evidence “Node4 helps businesses achieve more with secure, AI‑powered cloud and managed service platforms.” Source: RevenueBase Database · checked Sep 21, 2026
3	Epi-Use Labs	Indirect evidence	Manchester, United KingdomHQ checked Sep 21, 2026	501-1,000	370 contacts →
	Indirect evidence “EPI-USE Labs is a global software solutions and managed services company.” Source: RevenueBase Database · checked Sep 21, 2026
4	The Adaptavist Group	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	1,001-5,000	254 contacts →
	Indirect evidence “We are experts at delivering innovative software, tailored solutions, and quality services across some of the world's most trusted technology ecosystems, including Atlassian, AWS…” Source: RevenueBase Database · checked Sep 21, 2026
5	Percipere	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	201-500	245 contacts →
	Indirect evidence “Percipere is a niche global consultancy, partnering companies in their evolution towards greater operational efficiency and profitability.” Source: RevenueBase Database · checked Sep 21, 2026
6	Parser	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	201-500	242 contacts →
	Indirect evidence “At Parser we help organisations deliver impact through technology.” Source: RevenueBase Database · checked Sep 21, 2026
7	Leighton	Partial evidence	Newcastle Upon Tyne, United KingdomHQ checked Sep 21, 2026	51-200	201 contacts →
	Partial evidence “Leighton is a software development business that builds high performing teams and develops successful software applications for its customers.” Source: RevenueBase Database · checked Sep 21, 2026
8	Codurance	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	201-500	176 contacts →
	Indirect evidence “For over 13 years, Codurance has helped businesses and their boards solve complex software challenges, often the ones that have resisted previous attempts and now carry real…” Source: RevenueBase Database · checked Sep 21, 2026
9	Contino, A Cognizant Company	Indirect evidence	Liverpool Street, United KingdomHQ checked Sep 21, 2026	201-500	158 contacts →
	Indirect evidence “Contino joined the Cognizant family in 2019.” Source: RevenueBase Database · checked Sep 21, 2026
10	Daemon	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	145 contacts →
	Indirect evidence “Founded in 2007, Daemon is a technology consultancy with a mission to make the world a better place by creating movements that power digital transformation.” Source: RevenueBase Database · checked Sep 21, 2026
11	Intagleo Systems	Indirect evidence	Slough, United KingdomHQ checked Sep 21, 2026	51-200	138 contacts →
	Indirect evidence “For over 22 years, Intagleo has been a trusted partner for businesses worldwide and US Primes, empowering them to achieve their digital transformation goals through innovative…” Source: RevenueBase Database · checked Sep 21, 2026
12	Infosight Consulting	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	201-500	121 contacts →
	Indirect evidence “At Infosight, we architect the future of enterprises by engineering your digital core and activating the intelligence within.” Source: RevenueBase Database · checked Sep 21, 2026
13	Quorum	Partial evidence	Edinburgh, United KingdomHQ checked Sep 21, 2026	51-200	110 contacts →
	Partial evidence “We are an IT Consultancy and Managed Services company in Edinburgh with offices in London, Founded by Charles Scott, and Andrew Watson in We have successful Enterprise Consulting…” Source: RevenueBase Database · checked Sep 21, 2026
14	Neosalpha Technologies	Partial evidence	Maidenhead, United KingdomHQ checked Sep 21, 2026	51-200	97 contacts →
	Partial evidence “NeosAlpha: Your Trusted Partner in IT Consulting and Digital Transformation Founded in the UK in 2017, NeosAlpha is a niche IT consulting and services company, that delivers…” Source: RevenueBase Database · checked Sep 21, 2026
15	Answer Digital	Indirect evidence	Leeds, United KingdomHQ checked Sep 21, 2026	51-200	92 contacts →
	Indirect evidence “Answer Digital helps organisations use technology to improve their operations.” Source: RevenueBase Database · checked Sep 21, 2026
16	Abstract Group	Indirect evidence	Leeds, United KingdomHQ checked Sep 21, 2026	51-200	85 contacts →
	Indirect evidence “Abstract is a technology company founded in 2017, headquartered in Leeds, with delivery reach across the UK, Europe, and India.” Source: RevenueBase Database · checked Sep 21, 2026
17	Craftsmen	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	85 contacts →
	Indirect evidence “Craftsmen helps companies modernize products, engineering workflows, and digital operations for the AI era.” Source: RevenueBase Database · checked Sep 21, 2026
18	Intuition IT Intuitive Technology Recruitment	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	84 contacts →
	Indirect evidence “IT'S NOT RECRUITMENT.” Source: RevenueBase Database · checked Sep 21, 2026
19	Embridge Consulting	Indirect evidence	Northfleet, United KingdomHQ checked Sep 21, 2026	51-200	78 contacts →
	Indirect evidence “We deliver business transformation through technology-enabled change.” Source: RevenueBase Database · checked Sep 21, 2026
20	Clurgo	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	76 contacts →
	Indirect evidence “Clurgo empowers global enterprises and early ventures to deliver software at higher velocity and better quality.” Source: RevenueBase Database · checked Sep 21, 2026
21	EAI Systems	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	76 contacts →
	Indirect evidence “About Us - Two Decades of Enterprise Integration.” Source: RevenueBase Database · checked Sep 21, 2026
22	KLOIA	Strong evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	75 contacts →
	Strong evidence “Kloia is an AWS Premier Tier Services Partner that specializes in DevOps/Cloud, Application Modernization, Software Testing and Generative AI.” Source: RevenueBase Database · checked Sep 21, 2026
23	BIT Wave Solutions Limited	Indirect evidence	Reading, United KingdomHQ checked Sep 21, 2026	11-50	75 contacts →
	Indirect evidence “Headquartered at Reading, Berkshire in United Kingdom, Bit Wave Solutions enables global businesses to build their future by directing clients’ innovation & customization agenda.” Source: RevenueBase Database · checked Sep 21, 2026
24	Axtrum Technologies	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	68 contacts →
	Indirect evidence “We don’t only deliver a change – We deliver a change that adds value and delivers business benefit that is real, tangible and measurable!” Source: RevenueBase Database · checked Sep 21, 2026
25	Intelex Systems Limited	Partial evidence	Solihull, United KingdomHQ checked Sep 21, 2026	51-200	66 contacts →
	Partial evidence “Intelex Systems is a leading technology consulting, IT services and Right sourcing solutions company, delivering technology driven business solutions that meet strategic…” 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: application modernization consulting firms. 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 application modernization consulting firms.
Partial evidence: Its own public description names part of application modernization consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name application modernization consulting firms. 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 1,381 application modernization consulting firms based in the United Kingdom

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Application modernization consulting firms based in the United Kingdom at a glance

As of Sep 21, 2026

25.3%Verified-email coverage

11.6Average contacts per company

1-10Median size (employees)

39.9%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

882

11-50

347

51-200

113

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 1,381 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 application modernization consulting firms, 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 “application modernization consulting firms”. 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 application modernization consulting firms), 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 application modernization consulting firms, 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, 4,056 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.

Application modernization consulting firms by metro

Application modernization consulting firms in London551
Application modernization consulting firms in Manchester43

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 application modernization consulting firms, 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 application modernization consulting firms are there based in the United Kingdom?

RevenueBase identified 1,381 application modernization consulting firms 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?

PMC, headquartered in Abingdon, tops this list with the largest team on record.

Which city has the most application modernization consulting firms?

London leads with 551 headquartered companies, followed by Manchester (43) and Leeds (23).

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 4,056 verified decision-maker contacts tracked across these 1,381 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.