Company lists · Data refreshed September 2026

Top 25 Enterprise software modernization companies based in the United Kingdom

Name: Enterprise software modernization companies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 2, 2026 309 companies tracked

RevenueBase identified 309 enterprise software modernization companies headquartered in the United Kingdom as of September 2026 and tracks 84,641 professional contacts across them, including 22,964 with verified work emails and 7,912 with mobile numbers. London is the largest hub.

This list covers enterprise software modernization companies 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 2, 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 RevenueBase Smart Search rating on every row Refreshed Sep 2, 2026 86% judged on-target in blind review

309Companies

84,641Contacts tracked

22,964Verified emails

7,912Mobile numbers

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The 25 largest enterprise software modernization companies based in the United Kingdom

Ranked by team size

Top 25 of 309 enterprise software modernization companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 2, 2026. RevenueBase Smart Search rates how each company's information relates to enterprise software modernization companies: 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	Mphasis	Indirect evidence	London, United Kingdom	10001+	43,740 contacts →
	Indirect evidence “At Mphasis, engineering has been in our DNA since inception.” Source: RevenueBase Database · checked Sep 2, 2026
2	Persistent Systems	Strong evidence	Chertsey, United Kingdom	10001+	27,186 contacts →
	Strong evidence “We are an AI-led, platform-driven Digital Engineering and Enterprise Modernization partner, combining deep technical expertise and industry experience to help our clients…” Source: RevenueBase Database · checked Sep 2, 2026
3	Andersen LAB	Partial evidence	London, United Kingdom	1,001-5,000	3,609 contacts →
	Partial evidence “Andersen – your global software development partner Andersen is a global software development company with over 18 years of experience supporting businesses worldwide in their…” Source: RevenueBase Database · checked Sep 2, 2026
4	Ensono	Indirect evidence	Staines-Upon-Thames, United Kingdom	1,001-5,000	3,246 contacts →
	Indirect evidence “Ensono is an expert technology adviser and managed service provider.” Source: RevenueBase Database · checked Sep 2, 2026
5	BBD	Partial evidence	London, United Kingdom	1,001-5,000	1,220 contacts →
	Partial evidence “Welcome to BBD – where experience, innovation and software engineering excellence come together.” Source: RevenueBase Database · checked Sep 2, 2026
6	Indus NET Technologies INT	Partial evidence	London, United Kingdom	501-1,000	1,065 contacts →
	Partial evidence “For nearly three decades, Indus Net Technologies (INT.) has empowered global enterprises to build intelligent, secure, and scalable digital ecosystems -> transforming complexity…” Source: RevenueBase Database · checked Sep 2, 2026
7	Node4	Indirect evidence	London, United Kingdom	1,001-5,000	624 contacts →
	Indirect evidence “Node4 helps businesses achieve more with secure, AI‑powered cloud and managed service platforms.” Source: RevenueBase Database · checked Sep 2, 2026
8	Biztech Consulting & Solutions	Indirect evidence	Ruislip Ruislip, United Kingdom	201-500	317 contacts →
	Indirect evidence “With over 19+ years of experience and 1200+ successful projects, BiztechCS is an ISO 27001 and ISO 9001 certified company.” Source: RevenueBase Database · checked Sep 2, 2026
9	Redpanda Software	Strong evidence	London, United Kingdom	51-200	191 contacts →
	Strong evidence “redPanda Software is an enterprise software developer and technology enabler providing highly customised software, Mobile and Cloud solutions to businesses across sectors.” Source: RevenueBase Database · checked Sep 2, 2026
10	Qbrainx INC	Indirect evidence	London, United Kingdom	201-500	181 contacts →
	Indirect evidence “At the core of QBrainX's foundation is a mission to empower and fortify organizations across diverse domains, guiding them to achieve excellence in their respective fields.” Source: RevenueBase Database · checked Sep 2, 2026
11	Codurance	Partial evidence	London, United Kingdom	201-500	171 contacts →
	Partial 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 2, 2026
12	Quadwave Consulting PVT LTD	Strong evidence	London, United Kingdom	51-200	137 contacts →
	Strong evidence “Quadwave is a global software solutions and products company focused on providing high quality software solutions and services to enterprises, ISVs and online businesses.” Source: RevenueBase Database · checked Sep 2, 2026
13	Mechanical Orchard	Indirect evidence	United Kingdom	51-200	115 contacts →
	Indirect evidence “Mechanical Orchard is an AI-native technology company that de-risks the process of bringing old but critical computer systems up to date.” Source: RevenueBase Database · checked Sep 2, 2026
14	Decode	Partial evidence	London, United Kingdom	51-200	97 contacts →
	Partial evidence “DECODE is an EU-based, full-service software development partner for growing tech companies and established mid-market businesses, with offices in Zagreb and Düsseldorf.” Source: RevenueBase Database · checked Sep 2, 2026
15	Merixstudio	Strong evidence	Bristol, United Kingdom	51-200	84 contacts →
	Strong evidence “Global #1 Software Company on Clutch We design, build and modernize digital products, platforms and connected systems for mid-size and enterprise businesses - with AI-augmented…” Source: RevenueBase Database · checked Sep 2, 2026
16	BIT Wave Solutions Limited	Indirect evidence	Reading, United Kingdom	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 2, 2026
17	unipro.io	Partial evidence	Havant, United Kingdom	51-200	73 contacts →
	Partial evidence “Unipro is a bespoke software studio that creates custom solutions to solve the most complex digital transformation challenges, giving our clients unparalleled control and lasting…” Source: RevenueBase Database · checked Sep 2, 2026
18	Linksoft Technologies	Indirect evidence	Islington, United Kingdom	51-200	70 contacts →
	Indirect evidence “Linksoft builds AI-driven systems and helps companies adapt their technology infrastructure for the way modern businesses now operate.” Source: RevenueBase Database · checked Sep 2, 2026
19	Practicevantage Consulting	Indirect evidence	London, United Kingdom	51-200	64 contacts →
	Indirect evidence “At PracticeVantage, we help organizations simplify complexity and unlock efficiency through smart, scalable digital solutions.” Source: RevenueBase Database · checked Sep 2, 2026
20	Wavex Technology LTD	Indirect evidence	United Kingdom	51-200	60 contacts →
	Indirect evidence “Wavex offers a fresh approach to improving and modernising managed services.” Source: RevenueBase Database · checked Sep 2, 2026
21	Codification	Indirect evidence	Newcastle Upon Tyne, United Kingdom	51-200	60 contacts →
	Indirect evidence “Codification's mission is to help some of the world's most successful organisations keep pace with rapid technological change, by modernising their IT legacy and reducing the time…” Source: RevenueBase Database · checked Sep 2, 2026
22	Vertali	Partial evidence	England, United Kingdom	11-50	55 contacts →
	Partial evidence “Headquartered in the UK, Vertali has a long and distinctive pedigree providing IBM mainframe services, skills and software to organizations around the world.” Source: RevenueBase Database · checked Sep 2, 2026
23	Diegesis Limited	Indirect evidence	London, United Kingdom	51-200	53 contacts →
	Indirect evidence “Diegesis is a business technology and IT systems integration company that specialises in Decision Support Solutions.” Source: RevenueBase Database · checked Sep 2, 2026
24	Elitex	Partial evidence	Edinburgh, United Kingdom	51-200	51 contacts →
	Partial evidence “ELITEX is a custom software development company with a focus on UI Modernisation and DevOps.” Source: RevenueBase Database · checked Sep 2, 2026
25	Cloudhouse	Indirect evidence	London, United Kingdom	51-200	50 contacts →
	Indirect evidence “Cloudhouse Change is the common root cause of failure.” Source: RevenueBase Database · checked Sep 2, 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: enterprise software modernization companies. 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 enterprise software modernization companies.
Partial evidence: Its own public description names part of enterprise software modernization companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name enterprise software modernization companies. 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 309 enterprise software modernization companies based in the United Kingdom

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Enterprise software modernization companies based in the United Kingdom at a glance

As of Sep 2, 2026

27.1%Verified-email coverage

9.3%Mobile-number coverage

273.9Average contacts per company

1-10Median size (employees)

39.5%Largest-city concentration · London

Sep 2, 2026Page data refreshed

Companies by employee count

1-10

159

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

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 enterprise software modernization companies, 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 “enterprise software modernization companies”. 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 enterprise software modernization companies), 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 enterprise software modernization companies, 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, 22,964 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 2, 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.

Enterprise software modernization companies by metro

Enterprise software modernization companies in London122

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 enterprise software modernization companies, 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 enterprise software modernization companies are there based in the United Kingdom?

RevenueBase identified 309 enterprise software modernization companies 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?

Mphasis, headquartered in London, tops this list with the largest team on record.

Which city has the most enterprise software modernization companies?

London leads with 122 headquartered companies, followed by Manchester (8) and Reading (8).

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 22,964 verified decision-maker contacts tracked across these 309 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 2, 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.