Company lists · Data refreshed September 2026

Top 25 Financial systems integrators based in the United Kingdom

RevenueBase identified 148 company matches for financial systems integrators associated with the United Kingdom as of September 2026 and tracks 8,629 professional contacts across them, including 3,991 with verified work emails. London is the largest hub.

This list covers company matches for financial systems integrators 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 September 28, 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 Sep 28, 2026 How this list was built
148Companies
8,629Contacts tracked
3,991Verified emails
Explore this list → Free signup · no credit card · 500 free credits

The 25 largest financial systems integrators based in the United Kingdom

Ranked by team size
Top 25 of 148 company matches for financial systems integrators based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 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 matchPaddington, United KingdomHQ recorded Sep 28, 20265,001-10,0006,779 contacts →

Exact match

“We’re partnering with financial institutions to deliver reliable and secure mission-critical financial services software shaped by their needs and driven by innovation.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2Exact matchNewry, United KingdomHQ recorded Sep 28, 20261,001-5,000988 contacts →

Exact match

“First Derivative is driven by people, data, and technology, unlocking the value of insight, hindsight, and foresight to drive organizations forward.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3Exact matchLondon, United KingdomHQ recorded Sep 28, 202611-5088 contacts →

Exact match

“Corfinancial provides software and advice to the financial services sector around the world.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4Exact matchEast Kilbride, United KingdomHQ recorded Sep 28, 202651-20064 contacts →

Exact match

“At Eureka Solutions, we specialise in implementing powerful cloud-based systems that have the potential to revolutionise your business.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5Exact matchLondon, United KingdomHQ recorded Sep 28, 202611-5036 contacts →

Exact match

“Fairmort is a software product & consultancy company.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6Exact matchLondon, United KingdomHQ recorded Sep 28, 202611-5030 contacts →

Exact match

“Celer Technologies is a global financial software company that creates modular-based systems that have the flexibility to meet today's dynamic business environment.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7Exact matchLondon, United KingdomHQ recorded Sep 28, 202611-5029 contacts →

Exact match

“Covarius, a Skysparc company, is a consulting and solutions provider with a focus on technology within treasury, risk and finance.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8Exact matchBristol, United KingdomHQ recorded Sep 28, 202611-5023 contacts →

Exact match

“G7 is a trusted and experienced expert in the implementation and support of business systems.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9Exact matchBellshill, United KingdomHQ recorded Sep 28, 202651-20023 contacts →

Exact match

“Founded in 1982, Castle Computer Services provides accounting and financial management software, business intelligence solutions, cloud and managed IT services throughout the UK…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10Exact matchLondon, United KingdomHQ recorded Sep 28, 202611-5020 contacts →

Exact match

“At RocketFin, we design and build decision-making environments that connect the systems firms already rely on, without ripping them out.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Sep 28, 202651-20019 contacts →

Exact match

“Where Data Flows.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12Exact matchLondon, United KingdomHQ recorded Sep 28, 202611-5019 contacts →

Exact match

“Fentexa is a technology-driven consultancy, dedicated to the financial markets sector.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13Exact matchLondon, United KingdomHQ recorded Sep 28, 202611-5012 contacts →

Exact match

“At Chariot House, we specialize in supporting small to medium-sized organisations in managing their finances more efficiently and with greater simplicity.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14Exact matchCheltenham, United KingdomHQ recorded Sep 28, 202611-5012 contacts →

Exact match

“We’re Nephos, and we believe that there’s a better way to grow your business.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15Exact matchSurrey, United KingdomHQ recorded Sep 28, 202611-5011 contacts →

Exact match

“Verostone helps companies realise long-term value through end-to-end Applied Financial intelligence, and provide the innovative Axiom, Planful, and Vena platforms.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16Exact matchEdenbridge, United KingdomHQ recorded Sep 28, 202611-5011 contacts →

Exact match

“Finance teams come to us when their finance system needs to support more complex reporting, approvals, workflows or business structures.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17Exact matchLondon, United KingdomHQ recorded Sep 28, 202611-5011 contacts →

Exact match

“We help banks and financial institutions get the best functionality out of their software applications.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18Exact matchStoke-on-trent, United KingdomHQ recorded Sep 28, 202611-5010 contacts →

Exact match

“When you absolutely don't want to pay a small fortune for your finance/accounting or ERP solutions, it's time to get in touch.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19Exact matchGuildford, United KingdomHQ recorded Sep 28, 20261-109 contacts →

Exact match

“The company provides accounting and finance services across a number of sectors, IT service and support across various systems and applications, customers many different sectors…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20Exact matchLondon, United KingdomHQ recorded Sep 28, 202611-508 contacts →

Exact match

“By connecting the world’s leading financial institutions to a common data layer, we aim to make markets more efficient, improve communication & simplify workflows.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21Exact matchWhitstable, United KingdomHQ recorded Sep 28, 202611-506 contacts →

Exact match

“At Achieving Clarity we care about business.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22Exact matchBristol, United KingdomHQ recorded Sep 28, 202611-506 contacts →

Exact match

“Whether you're a smaller business or a large corporation, we offer a range of professional services to help you get the most from your software.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23Exact matchGaerwen, United KingdomHQ recorded Sep 28, 202611-506 contacts →

Exact match

“Clear Accounting are based on Anglesey in North West Wales, and Capenhurst Chester.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24Exact matchTelford, United KingdomHQ recorded Sep 28, 20261-106 contacts →

Exact match

“We make the complex simple - Future of Finance Consulting is a leading finance consulting firm specialising in Finance Transformation.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25Exact matchLondon, United KingdomHQ recorded Sep 28, 202611-505 contacts →

Exact match

“Wisesystems is a UK based consulting firm, provider of technical and business expertise focused on the financial services industry.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase

Showing 25 of 148 financial systems integrators based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 3,991 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Financial systems integrators based in the United Kingdom at a glance

As of Sep 28, 2026
46.3%Verified-email coverage
58.3Average contacts per company
1-10Median size (employees)
40.5%Largest-city concentration · London
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
102
11-50
36
51-200
7
201-500
1
1,001-5,000
1
5,001-10,000
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 148 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 “financial systems integrators” 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 3,991 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 September 28, 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.

Financial systems integrators 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 “financial systems integrators”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many financial systems integrators are there based in the United Kingdom?

RevenueBase identified 148 company matches for financial systems integrators associated with the United Kingdom as of September 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?

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

Which city has the most financial systems integrators?

London leads with 60 company records, followed by Bristol (5) and Birmingham (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 3,991 professional contacts with verified work emails tracked across these 148 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 September 28, 2026.

Ready to reach these companies? Verified emails and direct dials for all 148 financial systems integrators based in the United Kingdom. Start with a free account, no credit card.

Download this list →

Related lists

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.