Company lists · Data refreshed September 2026

Top 25 Enterprise software modernization firms based in London, United Kingdom

Name: Enterprise software modernization firms 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 284 companies tracked

RevenueBase identified 284 enterprise software modernization firms headquartered in London, United Kingdom as of September 2026 and tracks 3,220 professional contacts across them, including 828 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers enterprise software modernization firms 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

284Companies

3,220Contacts tracked

828Verified emails

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The 25 largest enterprise software modernization firms based in London, United Kingdom

Ranked by team size

Top 25 of 284 enterprise software modernization firms 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 enterprise software modernization 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	Parser	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	242 contacts →
	Indirect evidence “At Parser we help organisations deliver impact through technology.” Source: RevenueBase Database · checked Sep 28, 2026
2	Codurance	Partial evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
3	Opinov8	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	154 contacts →
	Indirect evidence “Winner of the Best AI Company Award by The Netty Awards · Headquartered in London, powered by a worldwide team of engineers across Europe, Egypt, and the Americas.” Source: RevenueBase Database · checked Sep 28, 2026
4	Infosight Consulting	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	121 contacts →
	Partial evidence “At Infosight, we architect the future of enterprises by engineering your digital core and activating the intelligence within.” Source: RevenueBase Database · checked Sep 28, 2026
5	Agilitz Technologies	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	80 contacts →
	Indirect evidence “Agilitz Technologies leverages the full power of Microsoft ecosystem to transform the way organizations work and to improve their business performance.” Source: RevenueBase Database · checked Sep 28, 2026
6	Clurgo	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	76 contacts →
	Strong evidence “Clurgo empowers global enterprises and early ventures to deliver software at higher velocity and better quality.” Source: RevenueBase Database · checked Sep 28, 2026
7	KLOIA	Strong evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
8	unipro.io	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	71 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 28, 2026
9	Validata Group	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	68 contacts →
	Partial evidence “Validata Group is an international company that empowers banks and financial services with continuous quality engineering, smart ‘progressive’ data migration and enterprise…” Source: RevenueBase Database · checked Sep 28, 2026
10	Gemba Advantage	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	59 contacts →
	Partial evidence “Gemba Advantage make high-impact software that is secure, scalable and sustainable.” Source: RevenueBase Database · checked Sep 28, 2026
11	Runibex	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	59 contacts →
	Indirect evidence “Runibex is a technology products company.” Source: RevenueBase Database · checked Sep 28, 2026
12	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
13	Turintech AI	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	52 contacts →
	Indirect evidence “At TurinTech, we deliver AI-driven solutions that transform the code and data you have into the optimized, production-ready solutions you need.” Source: RevenueBase Database · checked Sep 28, 2026
14	Devbox	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	52 contacts →
	Partial evidence “Devbox Technologies is a UK based company that specializes in providing services related to the development, testing, maintenance, and enhancement of software applications for…” Source: RevenueBase Database · checked Sep 28, 2026
15	Elitex	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	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 28, 2026
16	Warrgyizmorsch	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	51 contacts →
	Indirect evidence “Tailored ERP, CRM & SaaS that automates your operations and fuels measurable growth.” Source: RevenueBase Database · checked Sep 28, 2026
17	Cloudhouse	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	50 contacts →
	Indirect evidence “Cloudhouse Change is the common root cause of failure.” Source: RevenueBase Database · checked Sep 28, 2026
18	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
19	Xenith Document Systems	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	39 contacts →
	Indirect evidence “We modernise device management, extract valuable data and improve document workflows.” Source: RevenueBase Database · checked Sep 28, 2026
20	Blackwater Tech	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	33 contacts →
	Indirect evidence “At Blackwater Tech, we help clients accelerate growth and improve performance through tailored technology solutions.” Source: RevenueBase Database · checked Sep 28, 2026
21	Camwood	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	31 contacts →
	Partial evidence “Camwood: Igniting Enterprise Innovation for 25 Years.” Source: RevenueBase Database · checked Sep 28, 2026
22	The RAD Consulting Group	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	27 contacts →
	Indirect evidence “RAD is a technology consultancy specialising in digital platform modernisation for property, retail and financial services organisations.” Source: RevenueBase Database · checked Sep 28, 2026
23	Leapsight	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	25 contacts →
	Partial evidence “We are an innovative software boutique consulting firm where extraordinary business insight meets technical excellence.” Source: RevenueBase Database · checked Sep 28, 2026
24	Vthrive Solutions	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	25 contacts →
	Indirect evidence “Welcome to VThrive Solutions, where your business takes center stage as we cater to your technological needs.” Source: RevenueBase Database · checked Sep 28, 2026
25	Coremaker	Partial evidence	London, United KingdomHQ checked Sep 28, 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 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: enterprise software modernization 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 enterprise software modernization firms.
Partial evidence: Its own public description names part of enterprise software modernization firms, 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 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 284 enterprise software modernization firms based in London, United Kingdom

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Enterprise software modernization firms based in London, United Kingdom at a glance

As of Sep 28, 2026

25.7%Verified-email coverage

11.3Average contacts per company

11-50Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

126

11-50

106

51-200

201-500

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 284 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 enterprise software modernization 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 London, United Kingdom whose own description of what they do matches “enterprise software modernization 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 enterprise software modernization 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 enterprise software modernization firms, 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, 828 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 enterprise software modernization 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 enterprise software modernization firms are there based in London, United Kingdom?

RevenueBase identified 284 enterprise software modernization firms 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?

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

Which city in the United Kingdom has the most enterprise software modernization firms?

London leads the United Kingdom with 284 headquartered companies, followed by Manchester (26) and Birmingham (12).

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 828 verified decision-maker contacts tracked across these 284 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.