Company lists · Data refreshed September 2026

Top 25 Software modernization companies based in the United Kingdom

Name: 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 29, 2026 172 companies tracked

RevenueBase identified 172 software modernization companies headquartered in the United Kingdom as of September 2026 and tracks 2,325 professional contacts across them, including 658 with verified work emails. London is the largest hub.

This list covers 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 29, 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 29, 2026 86% judged on-target in blind review

172Companies

2,325Contacts tracked

658Verified emails

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The 25 largest software modernization companies based in the United Kingdom

Ranked by team size

Top 25 of 172 software modernization companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to 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	Parser	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	201-500	242 contacts →
	Indirect evidence “At Parser we help organisations deliver impact through technology.” Source: RevenueBase Database · checked Sep 29, 2026
2	Dreams Technologies, UK & India	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	201-500	221 contacts →
	Partial evidence “At Dreams Technologies, we’re more than software engineers, we’re digital transformation partners.” Source: RevenueBase Database · checked Sep 29, 2026
3	Leighton	Partial evidence	Newcastle Upon Tyne, United KingdomHQ checked Sep 29, 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 29, 2026
4	Codurance	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	201-500	176 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 29, 2026
5	Intagleo Systems	Indirect evidence	Slough, United KingdomHQ checked Sep 29, 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 29, 2026
6	Craftsmen	Indirect evidence	London, United KingdomHQ checked Sep 29, 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 29, 2026
7	Clurgo	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	76 contacts →
	Partial evidence “Clurgo empowers global enterprises and early ventures to deliver software at higher velocity and better quality.” Source: RevenueBase Database · checked Sep 29, 2026
8	KLOIA	Strong evidence	London, United KingdomHQ checked Sep 29, 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 29, 2026
9	Codex Software	Partial evidence	Cirencester, United KingdomHQ checked Sep 29, 2026	51-200	63 contacts →
	Partial evidence “Codex makes software simple, strategic, and reliable.” Source: RevenueBase Database · checked Sep 29, 2026
10	Estafet	Indirect evidence	Richmond, United KingdomHQ checked Sep 29, 2026	51-200	56 contacts →
	Indirect evidence “At Estafet, we don’t just optimize processes - we revolutionize how enterprises operate.” Source: RevenueBase Database · checked Sep 29, 2026
11	Theodo UK	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	46 contacts →
	Indirect evidence “Theodo was founded 14 years ago and comprises 700 employees across offices in London, Paris, New York, Casablanca and Cape Town.” Source: RevenueBase Database · checked Sep 29, 2026
12	Propel Tech	Indirect evidence	Wakefield, United KingdomHQ checked Sep 29, 2026	51-200	36 contacts →
	Indirect evidence “As experts across new and legacy technologies we make possibilities happen to move business forward.” Source: RevenueBase Database · checked Sep 29, 2026
13	Camwood	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	31 contacts →
	Indirect evidence “Camwood: Igniting Enterprise Innovation for 25 Years.” Source: RevenueBase Database · checked Sep 29, 2026
14	Coremaker	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	24 contacts →
	Partial evidence “We are a software engineering studio, that helps large companies tackle innovation head-on.” Source: RevenueBase Database · checked Sep 29, 2026
15	Rockpool Digital	Indirect evidence	Bristol, United KingdomHQ checked Sep 29, 2026	11-50	21 contacts →
	Indirect evidence “We help clients deliver digital transformation projects that create better digital experiences.” Source: RevenueBase Database · checked Sep 29, 2026
16	Styletech Solutions Limited	Partial evidence	Hessle, United KingdomHQ checked Sep 29, 2026	11-50	19 contacts →
	Partial evidence “At StyleTech, we specialise in bespoke software that’s built around your business.” Source: RevenueBase Database · checked Sep 29, 2026
17	Appdrawn Software Development	Indirect evidence	Watford, United KingdomHQ checked Sep 29, 2026	11-50	16 contacts →
	Indirect evidence “At Appdrawn we want the computers to do the work for you, so you can do the things computers cannot: meet with your clients, engage with your team or dream about your next step!” Source: RevenueBase Database · checked Sep 29, 2026
18	Bridgeapps LTD	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	16 contacts →
	Indirect evidence “We are tech savvy bunch of people who love to work with Cloud, Infra and Code to create meaningful solutions which solves real business problems.” Source: RevenueBase Database · checked Sep 29, 2026
19	Enterprise Automation Services EAS	Indirect evidence	Cardiff, United KingdomHQ checked Sep 29, 2026	11-50	13 contacts →
	Indirect evidence “Overview: Enterprise Automation Services (EAS) help transform organisational IT to increase efficiencies.” Source: RevenueBase Database · checked Sep 29, 2026
20	T5 Digital	Indirect evidence	Leeds, United KingdomHQ checked Sep 29, 2026	11-50	12 contacts →
	Indirect evidence “T5 Digital is a boutique consultancy delivering hands-on business and technology solutions tailored to your needs.” Source: RevenueBase Database · checked Sep 29, 2026
21	Flowmoco	Indirect evidence	Newquay, United KingdomHQ checked Sep 29, 2026	11-50	11 contacts →
	Indirect evidence “Flowmoco: Transforming Technical Challenges into Solutions At Flowmoco, we deliver seamless technical solutions to help businesses thrive.” Source: RevenueBase Database · checked Sep 29, 2026
22	Migrationware	Indirect evidence	Reading, United KingdomHQ checked Sep 29, 2026	11-50	10 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 29, 2026
23	DRS Software	Partial evidence	Leeds, United KingdomHQ checked Sep 29, 2026	1-10	10 contacts →
	Partial evidence “DRS is a specialist software development and consulting firm focused on high performance web applications, data analytics and application modernisation.” Source: RevenueBase Database · checked Sep 29, 2026
24	Galvia Digital	Partial evidence	Belfast, United KingdomHQ checked Sep 29, 2026	11-50	9 contacts →
	Partial evidence “We help businesses modernize, innovate, and scale with custom software development, IoT solutions, and digital transformation.” Source: RevenueBase Database · checked Sep 29, 2026
25	Bluebox Software	Partial evidence	Worcester, United KingdomHQ checked Sep 29, 2026	11-50	9 contacts →
	Partial evidence “For over 20 years, we’ve partnered with ambitious start-ups, growing SMEs and established enterprises to design software that does more than just “work.” We solve complex…” Source: RevenueBase Database · checked Sep 29, 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: 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 software modernization companies.
Partial evidence: Its own public description names part of 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 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 172 software modernization companies based in the United Kingdom

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Software modernization companies based in the United Kingdom at a glance

As of Sep 29, 2026

28.3%Verified-email coverage

13.5Average contacts per company

1-10Median size (employees)

36.6%Largest-city concentration · London

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

113

11-50

51-200

201-500

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 172 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 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 “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 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 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, 658 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 29, 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.

Software modernization companies by metro

Software modernization companies in London63

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 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 software modernization companies are there based in the United Kingdom?

RevenueBase identified 172 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?

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

Which city has the most software modernization companies?

London leads with 63 headquartered companies, followed by Glasgow (6) and Manchester (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 658 verified decision-maker contacts tracked across these 172 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 29, 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.