Company lists · Data refreshed September 2026

Top 12 Enterprise middleware software companies based in the United Kingdom

RevenueBase identified 42 enterprise middleware software companies headquartered in the United Kingdom as of September 2026 and tracks 636 professional contacts across them, including 215 with verified work emails. London is the largest hub.

This list covers enterprise middleware software 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 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
42Companies
636Contacts tracked
215Verified emails
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The 12 largest enterprise middleware software companies based in the United Kingdom

Ranked by team size
Top 12 of 42 enterprise middleware software companies based in the 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 middleware software 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Strong evidenceLondon, United KingdomHQ checked Sep 28, 202651-20024 contacts →

Strong evidence

“Casewise is a recognized leader in providing software solutions and professional services for Business Process Management and Enterprise Architecture.”

Source: RevenueBase Database · checked Sep 28, 2026
2Indirect evidenceStaines-upon-thames, United KingdomHQ checked Sep 28, 202611-5013 contacts →

Indirect evidence

“AdvanceFirst Technologies Ltd is a leading e-business enabler and systems integration company.”

Source: RevenueBase Database · checked Sep 28, 2026
3Indirect evidenceSutton, United KingdomHQ checked Sep 28, 202651-20011 contacts →

Indirect evidence

“At Adaptris our mantra is Integration Anywhere.”

Source: RevenueBase Database · checked Sep 28, 2026
4Partial evidenceMalvern, United KingdomHQ checked Sep 28, 202611-506 contacts →

Partial evidence

“c2b2 is a specialist and independent middleware consultancy, providing middleware expertise across the application environment.”

Source: RevenueBase Database · checked Sep 28, 2026
5Strong evidenceLondon, United KingdomHQ checked Sep 28, 202611-504 contacts →

Strong evidence

“Luther Systems is an enterprise software company focused on automating complex enterprise processes on our distributed execution platform.”

Source: RevenueBase Database · checked Sep 28, 2026
6Strong evidenceLondon, United KingdomHQ checked Sep 28, 20261-104 contacts →

Strong evidence

“Realisable Software Ltd provide code-free & configuration based integration, middleware and BPM solutions for small-medium enterprises.”

Source: RevenueBase Database · checked Sep 28, 2026
7Strong evidenceTewkesbury, United KingdomHQ checked Sep 28, 20261-103 contacts →

Strong evidence

“Enterprise Software Development”

Source: RevenueBase Database · checked Sep 28, 2026
8Strong evidenceHigh Wycombe, United KingdomHQ checked Sep 28, 202611-502 contacts →

Strong evidence

“Ryland Technology builds future-forward, highly scalable software platforms for global enterprises-integrating complex systems to sustain high-volume operations for decades.”

Source: RevenueBase Database · checked Sep 28, 2026
9Strong evidenceLondon, United KingdomHQ checked Sep 28, 20261-102 contacts →

Strong evidence

“At The Agile Workshop, we specialise in building enterprise software systems.”

Source: RevenueBase Database · checked Sep 28, 2026
10Partial evidenceEdinburgh, United KingdomHQ checked Sep 28, 20261-102 contacts →

Partial evidence

“Operating within the IT industry, we are a global software company dedicated to delivering high-quality innovative software solutions to our customers and partners working within…”

Source: RevenueBase Database · checked Sep 28, 2026
11Indirect evidenceStevenage, United KingdomHQ checked Sep 28, 202611-501 contacts →

Indirect evidence

“Based in the Business & Technology Centre in Stevenage our application development teams work in partnership with clients to develop advanced web and mobile applications…”

Source: RevenueBase Database · checked Sep 28, 2026
12Partial evidenceLondon, United KingdomHQ checked Sep 28, 20261-101 contacts →

Partial evidence

“Layer 8 and industry partners present the ultimate middleware platform that integrates and automates disparate tech systems to increase customer satisfaction via efficiency.”

Source: RevenueBase Database · checked Sep 28, 2026

Showing 12 of 42 enterprise middleware software companies based in the United Kingdom

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

As of Sep 28, 2026
33.8%Verified-email coverage
15.1Average contacts per company
11-50Median size (employees)
33.3%Largest-city concentration · London
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
20
11-50
17
51-200
2
1,001-5,000
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 42 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 middleware software 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 middleware software 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 middleware software 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 middleware software 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, 215 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 middleware software 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 middleware software companies are there based in the United Kingdom?

RevenueBase identified 42 enterprise middleware software 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?

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

Which city has the most enterprise middleware software companies?

London leads with 14 headquartered companies, followed by Ipswich (2) and Staines-Upon-Thames (2).

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 215 verified decision-maker contacts tracked across these 42 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.