Company lists · Data refreshed November 2026

Top 22 Mainframe modernization consultants based in the United Kingdom

RevenueBase identified 198 company matches for mainframe modernization consultants associated with the United Kingdom as of November 2026 and tracks 1,840 professional contacts across them, including 452 with verified work emails. London is the largest hub.

This list covers company matches for mainframe modernization consultants 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 November 6, 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 Nov 6, 2026 How this list was built
198Companies
1,840Contacts tracked
452Verified emails
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The 22 largest mainframe modernization consultants based in the United Kingdom

Ranked by team size
Top 22 of 198 company matches for mainframe modernization consultants based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchMaidenhead, United KingdomHQ recorded Nov 6, 202651-200110 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 · Nov 6, 2026 · View company records in RevenueBase
2Exact matchBromsgrove B60 3dj, United KingdomHQ recorded Nov 6, 202611-5067 contacts →

Exact match

“Headquartered in the UK, Vertali has a long and distinctive pedigree providing IBM mainframe services, skills and software to organizations around the world.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchRichmond, United KingdomHQ recorded Nov 6, 202651-20054 contacts →

Exact match

“At Estafet, we don’t just optimize processes - we revolutionize how enterprises operate.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchLondon, United KingdomHQ recorded Nov 6, 202651-20053 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 · Nov 6, 2026 · View company records in RevenueBase
5Exact matchLondon, United KingdomHQ recorded Nov 6, 202651-20036 contacts →

Exact match

“Camwood: Igniting Enterprise Innovation for 25 Years.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchBurwell, United KingdomHQ recorded Nov 6, 202611-5034 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 · Nov 6, 2026 · View company records in RevenueBase
7Exact matchLondon, United KingdomHQ recorded Nov 6, 202651-20016 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchSheffield, United KingdomHQ recorded Nov 6, 202611-5015 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 · Nov 6, 2026 · View company records in RevenueBase
9Exact matchSwindon, United KingdomHQ recorded Nov 6, 20261-1015 contacts →

Exact match

“Culverdocs helps you convert paper-based forms in to digital solutions.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-5014 contacts →

Exact match

“PopUp Mainframe provides mainframe development teams with an immediately available, fully functioning mainframe.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchNewquay, United KingdomHQ recorded Nov 6, 202611-5013 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 · Nov 6, 2026 · View company records in RevenueBase
12Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-5011 contacts →

Exact match

“Tammwe helps organisations unlock faster, smarter, and more cost-effective digital transformation.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchReading, United KingdomHQ recorded Nov 6, 202611-5010 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 · Nov 6, 2026 · View company records in RevenueBase
14Exact matchSaltaire, United KingdomHQ recorded Nov 6, 202611-509 contacts →

Exact match

“True9 is a technology consultancy grounded in real-world delivery.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-509 contacts →

Exact match

“Our Focus, Setting you up for success.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-508 contacts →

Exact match

“Ti3 Consulting is a UK-based company specialising in Business Transformation and IT Services, offering both onshore and offshore delivery capabilities.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchSwansea, United KingdomHQ recorded Nov 6, 202611-507 contacts →

Exact match

“Many businesses are not fully utilising their IT infrastructure, missing out on opportunities for continuity, growth, and enhanced productivity.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchLondon, United KingdomHQ recorded Nov 6, 20261-107 contacts →

Exact match

“You're running a growing financial services business.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchYeovil, United KingdomHQ recorded Nov 6, 202611-507 contacts →

Exact match

“Intelligent Enterprise Products (IEP) is an innovative software development and systems integration company based in the South West of England.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchBirmingham, United KingdomHQ recorded Nov 6, 20261-106 contacts →

Exact match

“Slingstone Business Consulting helps businesses transform using technology.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchSouthampton, United KingdomHQ recorded Nov 6, 20261-105 contacts →

Exact match

“At Netshell, we help businesses move beyond outdated systems and manual processes by implementing intelligent, future‑ready tools and strategies.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-505 contacts →

Exact match

“IT change and due diligence consultants Our mission: We are passionate about finding technological solutions that make commercial sense for our clients – helping them to maximise…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 22 of 198 mainframe modernization consultants based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 452 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Mainframe modernization consultants based in the United Kingdom at a glance

As of Nov 6, 2026
24.6%Verified-email coverage
9.3Average contacts per company
1-10Median size (employees)
35.4%Largest-city concentration · London
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
134
11-50
43
51-200
14
201-500
2
501-1,000
2
5,001-10,000
1
10001+
1

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 198 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 “mainframe modernization consultants” 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 452 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 November 6, 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.

Mainframe modernization consultants by metro

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 “mainframe modernization consultants”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many mainframe modernization consultants are there based in the United Kingdom?

RevenueBase identified 198 company matches for mainframe modernization consultants associated with the United Kingdom as of November 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?

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

Which city has the most mainframe modernization consultants?

London leads with 70 company records, followed by Leeds (4) and Manchester (4).

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 452 professional contacts with verified work emails tracked across these 198 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 November 6, 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 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.