Company lists · Data refreshed October 2026

Top 25 Legacy application & platform modernization services based in the United Kingdom

Name: Legacy application & platform modernization services based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 19, 2026 138 companies tracked

RevenueBase identified 138 company matches for legacy application & platform modernization services associated with the United Kingdom as of October 2026 and tracks 2,375 professional contacts across them, including 1,074 with verified work emails. London is the largest hub.

This list covers company matches for legacy application & platform modernization services associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 19, 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 RevenueBase SmartSearch · Exact Recorded Oct 19, 2026 How this list was built

138Companies

2,375Contacts tracked

1,074Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest legacy application & platform modernization services based in the United Kingdom

Ranked by team size

Top 25 of 138 company matches for legacy application & platform modernization services based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 19, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Node4	Exact match	Derby, United KingdomHQ recorded Oct 19, 2026	1,001-5,000	675 contacts →
	Exact match “Node4 helps businesses achieve more with secure, AI‑powered cloud and managed service platforms.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
2	Codurance	Exact match	London, United KingdomHQ recorded Oct 19, 2026	201-500	169 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
3	Infosight Consulting	Exact match	London, United KingdomHQ recorded Oct 19, 2026	201-500	121 contacts →
	Exact match “At Infosight, we architect the future of enterprises by engineering your digital core and activating the intelligence within.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
4	Neosalpha Technologies	Exact match	Maidenhead, United KingdomHQ recorded Oct 19, 2026	51-200	108 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
5	KLOIA	Exact match	London, United KingdomHQ recorded Oct 19, 2026	51-200	83 contacts →
	Exact match “Kloia is an AWS Premier Tier Services Partner that specializes in DevOps/Cloud, Application Modernization, Software Testing and Generative AI.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
6	Codex Software	Exact match	Cirencester, United KingdomHQ recorded Oct 19, 2026	51-200	60 contacts →
	Exact match “Codex makes software simple, strategic, and reliable.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
7	Estafet	Exact match	Richmond, United KingdomHQ recorded Oct 19, 2026	51-200	55 contacts →
	Exact match “At Estafet, we don’t just optimize processes - we revolutionize how enterprises operate.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
8	Cloudhouse	Exact match	London, United KingdomHQ recorded Oct 19, 2026	51-200	54 contacts →
	Exact match “Cloudhouse Change is the common root cause of failure.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
9	Diegesis Limited	Exact match	London, United KingdomHQ recorded Oct 19, 2026	51-200	52 contacts →
	Exact match “Diegesis is a business technology and IT systems integration company that specialises in Decision Support Solutions.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
10	Eclature Technologies	Exact match	Daresbury, United KingdomHQ recorded Oct 19, 2026	201-500	45 contacts →
	Exact match “Eclature Technologies stands for engineering innovation, excellence, and reliability.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
11	Auraq LTD	Exact match	Malvern, United KingdomHQ recorded Oct 19, 2026	11-50	43 contacts →
	Exact match “AuraQ provide bespoke technology solutions that enable our clients to differentiate in a competitive market.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
12	Camwood	Exact match	London, United KingdomHQ recorded Oct 19, 2026	51-200	36 contacts →
	Exact match “Camwood: Igniting Enterprise Innovation for 25 Years.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
13	Devbox	Exact match	London, United KingdomHQ recorded Oct 19, 2026	51-200	35 contacts →
	Exact match “Devbox Technologies is a UK based company that specializes in providing services related to the development, testing, maintenance, and enhancement of software applications for…” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
14	Flynet	Exact match	Burwell, United KingdomHQ recorded Oct 19, 2026	11-50	34 contacts →
	Exact match “Since 1995 Flynet have been building some of the industry's most sophisticated web based solutions for Mainframe, Unix, IBM i, VMS, VAX and MultiValue systems.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
15	The RAD Consulting Group	Exact match	London, United KingdomHQ recorded Oct 19, 2026	11-50	27 contacts →
	Exact match “RAD is a technology consultancy specialising in digital platform modernisation for property, retail and financial services organisations.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
16	Rockpool Digital	Exact match	Bristol, United KingdomHQ recorded Oct 19, 2026	11-50	22 contacts →
	Exact match “We help clients deliver digital transformation projects that create better digital experiences.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
17	Scad Software	Exact match	Newbury, United KingdomHQ recorded Oct 19, 2026	11-50	20 contacts →
	Exact match “Built on 20 years of experience building enterprise Applications we have created a "beyond Low Code" Application Development Platform that we deliver as a managed service to our…” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
18	Goaltech	Exact match	London, United KingdomHQ recorded Oct 19, 2026	11-50	15 contacts →
	Exact match “Goaltech \| Cloud.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
19	D Code IT	Exact match	London, United KingdomHQ recorded Oct 19, 2026	11-50	14 contacts →
	Exact match “We’re a digital design and development studio that have been transforming the way major financial institutions and enterprises work, think and perform for 10+ years.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
20	Flowmoco	Exact match	Newquay, United KingdomHQ recorded Oct 19, 2026	11-50	14 contacts →
	Exact match “Flowmoco: Transforming Technical Challenges into Solutions At Flowmoco, we deliver seamless technical solutions to help businesses thrive.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
21	Gistlens	Exact match	Harrogate, United KingdomHQ recorded Oct 19, 2026	11-50	13 contacts →
	Exact match “GistLens is a senior delivery partner for difficult modernisation work.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
22	Deeperthanblue LTD	Exact match	Sheffield, United KingdomHQ recorded Oct 19, 2026	11-50	12 contacts →
	Exact match “A dynamic IBM Solution Gold Partner, HCL Commerce & DX, BigCommerce (Elite) and Google Cloud Platform partners with a focus on Digital Channels, Transformation and Business Change…” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
23	Tammwe Buildateam AI	Exact match	London, United KingdomHQ recorded Oct 19, 2026	11-50	11 contacts →
	Exact match “Tammwe helps organisations unlock faster, smarter, and more cost-effective digital transformation.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
24	Migrationware	Exact match	Reading, United KingdomHQ recorded Oct 19, 2026	11-50	10 contacts →
	Exact match “MigrationWare is a solutions company dedicated to the preservation and protection of the life expectancy of business applications threatened by obsolete technology, as well as by…” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
25	Querix	Exact match	Southampton, United KingdomHQ recorded Oct 19, 2026	11-50	9 contacts →
	Exact match “We have been working in various areas of 4GL, ESQL/C, DBMS (Informix, Oracle, MS SQL Server, PostgreSQL, Db2, etc.), data migration and transformation for over 20 years now.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “legacy application & platform modernization services”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 138 legacy application & platform modernization services based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 1,074 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Legacy application & platform modernization services based in the United Kingdom at a glance

As of Oct 19, 2026

45.2%Verified-email coverage

17.2Average contacts per company

1-10Median size (employees)

34.1%Largest-city concentration · London

Oct 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

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 138 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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: Company records associated with the United Kingdom whose business descriptions match “legacy application & platform modernization services” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 1,074 professional contacts with verified work emails across the full matched dataset. 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 October 19, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Legacy application & platform modernization services by metro

Legacy application & platform modernization services in London47

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “legacy application & platform modernization services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many legacy application & platform modernization services are there based in the United Kingdom?

RevenueBase identified 138 company matches for legacy application & platform modernization services associated with the United Kingdom as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Node4 tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most legacy application & platform modernization services?

London leads with 47 company records, followed by Milton Keynes (4) and Birmingham (3).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 1,074 professional contacts with verified work emails tracked across these 138 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 19, 2026.

Ready to reach these companies? Verified emails and direct dials for all 138 legacy application & platform modernization services based in the United Kingdom. Start with a free account, no credit card.

Download this list →

Related lists

Legacy application & platform modernization services by geography

Browse the directory

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.