Company lists · Data refreshed September 2026

Top 25 Data outsourcing companies based in the United Kingdom

Name: Data outsourcing 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 1, 2026 880 companies tracked

RevenueBase identified 880 data outsourcing companies headquartered in the United Kingdom as of September 2026 and tracks 36,736 professional contacts across them, including 9,262 with verified work emails and 3,021 with mobile numbers. London is the largest hub.

This list covers data outsourcing 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 1, 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 RevenueBase Smart Search rating on every row Refreshed Sep 1, 2026 86% judged on-target in blind review

880Companies

36,736Contacts tracked

9,262Verified emails

3,021Mobile numbers

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest data outsourcing companies based in the United Kingdom

Ranked by team size

Top 25 of 880 data outsourcing companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 1, 2026. RevenueBase Smart Search rates how each company's information relates to data outsourcing 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	Firstsource	Indirect evidence	Warrington, United Kingdom	10001+	17,273 contacts →
	Indirect evidence “Established in 2001, Firstsource Solutions Limited, an RP-Sanjiv Goenka Group company, is a specialized BPS partner with hyper-focused, domain-centered teams and cutting-edge…” Source: RevenueBase Database · checked Sep 1, 2026
2	Oneadvanced	Indirect evidence	Birmingham, United Kingdom	1,001-5,000	2,257 contacts →
	Indirect evidence “Founded in 2008 OneAdvanced has grown into one of the UK’s largest providers of business software and services serving global customers with an annual turnover of £330M+.” Source: RevenueBase Database · checked Sep 1, 2026
3	Gspann Technologies, INC	Indirect evidence	London, United Kingdom	1,001-5,000	1,874 contacts →
	Indirect evidence “GSPANN is a US-based consulting services provider focused on implementations in Enterprise Content Management (ECM), Business Intelligence & Mobile Solutioning initiatives.” Source: RevenueBase Database · checked Sep 1, 2026
4	Caci LTD	Partial evidence	Birmingham, United Kingdom	1,001-5,000	1,657 contacts →
	Partial evidence “CACI offers an unrivalled range of data, marketing and IT solutions to a wide range of industries across both the public and private sectors.” Source: RevenueBase Database · checked Sep 1, 2026
5	Mobius Knowledge Services	Partial evidence	London, United Kingdom	501-1,000	1,434 contacts →
	Partial evidence “Mobius transforms the way data works for you.” Source: RevenueBase Database · checked Sep 1, 2026
6	Smartstream	Partial evidence	Bristol, United Kingdom	1,001-5,000	1,095 contacts →
	Partial evidence “Smartstream unlocks trusted, intelligent data insights – clearly, consistently, and without compromise.” Source: RevenueBase Database · checked Sep 1, 2026
7	AB Initio Software	Partial evidence	Weybridge, United Kingdom	501-1,000	813 contacts →
	Partial evidence “Ab Initio transforms how companies work with data, from data discovery and strategy through implementation and governance.” Source: RevenueBase Database · checked Sep 1, 2026
8	The Smart Cube	Indirect evidence	London, United Kingdom	501-1,000	717 contacts →
	Indirect evidence “We provide high performing intelligence that answers critical business questions for leading companies around the world.” Source: RevenueBase Database · checked Sep 1, 2026
9	Management Science Associates, INC	Indirect evidence	United Kingdom	501-1,000	520 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 1, 2026
10	Smartsourcing	Partial evidence	Bristol, United Kingdom	201-500	464 contacts →
	Partial evidence “Smartsourcing is a global outsourcing company redefining how businesses scale through people-first solutions.” Source: RevenueBase Database · checked Sep 1, 2026
11	Seargin	Partial evidence	London, United Kingdom	501-1,000	275 contacts →
	Partial evidence “Seargin was founded to close the gap between traditional advisory and hands-on delivery - combining strategic insight with deep expertise in ERP, AI and data.” Source: RevenueBase Database · checked Sep 1, 2026
12	Vcreatek Consulting	Partial evidence	Cardiff, United Kingdom	201-500	245 contacts →
	Partial evidence “Founded in 2014, VCreaTek is a next-generation data and AI services company with a global footprint.” Source: RevenueBase Database · checked Sep 1, 2026
13	Fusion Global Business Solutions	Partial evidence	London, United Kingdom	51-200	219 contacts →
	Partial evidence “As a global leader in service management, we help businesses transform their operations with data-driven insights, scalable digital solutions, and measurable results.” Source: RevenueBase Database · checked Sep 1, 2026
14	The Information LAB	Indirect evidence	London, United Kingdom	51-200	202 contacts →
	Indirect evidence “The Information Lab is on a mission.” Source: RevenueBase Database · checked Sep 1, 2026
15	Mapsystems	Indirect evidence	Portslade, United Kingdom	201-500	192 contacts →
	Indirect evidence “MAP Systems, since its inception in 1993, has registered steady growth.” Source: RevenueBase Database · checked Sep 1, 2026
16	Procode	Partial evidence	Chandlers Ford, United Kingdom	201-500	186 contacts →
	Partial evidence “We help you to transform your business with innovative technology, giving you the tools to tap into your data, reduce cost to serve and deliver world-class customer experience.” Source: RevenueBase Database · checked Sep 1, 2026
17	Cloudsmiths	Partial evidence	London, United Kingdom	51-200	150 contacts →
	Partial evidence “CloudSmiths is a technology consultancy specialising in data analytics, machine learning, software development, AI and business reporting in the cloud.” Source: RevenueBase Database · checked Sep 1, 2026
18	Sagacity	Partial evidence	London, United Kingdom	51-200	148 contacts →
	Partial evidence “Sagacity are the data intelligence people.” Source: RevenueBase Database · checked Sep 1, 2026
19	Simpson Associates	Partial evidence	York, United Kingdom	51-200	116 contacts →
	Partial evidence “Microsoft Partner of the Year 2024, Simpson Associates is a Data Transformation and managed services provider that helps organisations from both the public and private sectors…” Source: RevenueBase Database · checked Sep 1, 2026
20	Aker Systems	Partial evidence	Bicester, United Kingdom	51-200	113 contacts →
	Partial evidence “Founded in 2017, Aker is a modern data solutions provider, with offerings ranging from cloud-based software platforms to standardised, repeatable services that assist and empower…” Source: RevenueBase Database · checked Sep 1, 2026
21	Calligo	Partial evidence	Leicester, United Kingdom	201-500	111 contacts →
	Partial evidence “Calligo transforms data into your most lucrative asset.” Source: RevenueBase Database · checked Sep 1, 2026
22	Brickred Technologies	Indirect evidence	Chessington, United Kingdom	501-1,000	100 contacts →
	Indirect evidence “BrickRed Technologies - A 3Pillar Global Company Every day, some of the world's most hardworking organizations rely on our software and engineering skills to serve their customers…” Source: RevenueBase Database · checked Sep 1, 2026
23	Groupbwt	Partial evidence	London, United Kingdom	51-200	92 contacts →
	Partial evidence “GroupBWT is a consulting firm specializing in data management and the construction of data platforms.” Source: RevenueBase Database · checked Sep 1, 2026
24	AQB Solutions PVT LTD	Indirect evidence	London, United Kingdom	51-200	86 contacts →
	Indirect evidence “aQb is a progressive web application development company that has been offering a range of IT solution services for over a decade.” Source: RevenueBase Database · checked Sep 1, 2026
25	Growth HUB	Partial evidence	London, United Kingdom	51-200	84 contacts →
	Partial evidence “At Growth Hub, we help organisations streamline processes, harness data effectively, and make informed decisions.” Source: RevenueBase Database · checked Sep 1, 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: data outsourcing 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 data outsourcing companies.
Partial evidence: Its own public description names part of data outsourcing companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name data outsourcing 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 880 data outsourcing companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 9,262 reachable decision-makers.

Free signup · no credit card

View the full list →

Data outsourcing companies based in the United Kingdom at a glance

As of Sep 1, 2026

25.2%Verified-email coverage

8.2%Mobile-number coverage

41.7Average contacts per company

1-10Median size (employees)

40.9%Largest-city concentration · London

Sep 1, 2026Page data refreshed

Companies by employee count

1-10

559

11-50

209

51-200

201-500

501-1,000

1,001-5,000

10001+

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 data outsourcing 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 “data outsourcing 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 data outsourcing 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 data outsourcing 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, 9,262 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 1, 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.

Data outsourcing companies by metro

Data outsourcing companies in London360
Data outsourcing companies in Manchester30

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 data outsourcing 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 data outsourcing companies are there based in the United Kingdom?

RevenueBase identified 880 data outsourcing 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?

Firstsource, headquartered in Warrington, tops this list with the largest team on record.

Which city has the most data outsourcing companies?

London leads with 360 headquartered companies, followed by Manchester (30) and Leeds (17).

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 9,262 verified decision-maker contacts tracked across these 880 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 1, 2026.

Ready to reach these companies? Verified emails and direct dials for all 880 data outsourcing companies based in the United Kingdom. Start with a free account, no credit card.

Download this list →

Related lists

Data outsourcing companies by geography

Browse the directory

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.