Company lists · Data refreshed September 2026

Top 25 Business process outsourcing firms based in London, United Kingdom

Name: Business process outsourcing 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 8, 2026 171 companies tracked

RevenueBase identified 171 business process outsourcing firms headquartered in London, United Kingdom as of September 2026 and tracks 27,875 professional contacts across them, including 6,464 with verified work emails and 998 with mobile numbers. London is the largest hub.

This list covers business process outsourcing 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 8, 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 8, 2026 86% judged on-target in blind review

171Companies

27,875Contacts tracked

6,464Verified emails

998Mobile numbers

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The 25 largest business process outsourcing firms based in London, United Kingdom

Ranked by team size

Top 25 of 171 business process outsourcing firms based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 8, 2026. RevenueBase Smart Search rates how each company's information relates to business process outsourcing 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	Capita	Partial evidence	London, United KingdomHQ checked Sep 8, 2026	10001+	20,824 contacts →
	Partial evidence “Capita is an outsourcer, helping clients across the public and private sectors run complex business processes more efficiently, creating better consumer experiences.” Source: RevenueBase Database · checked Sep 8, 2026
2	QX Global Group	Partial evidence	London, United KingdomHQ checked Sep 8, 2026	1,001-5,000	3,115 contacts →
	Partial evidence “QX Global Group is a sector‑led, technology‑enabled Business Process Management partner serving mid‑market organizations across the US, UK, and Ireland.” Source: RevenueBase Database · checked Sep 8, 2026
3	Vertex Data Science	Partial evidence	London, United KingdomHQ checked Sep 8, 2026	51-200	569 contacts →
	Partial evidence “Vertex is a leader in BPO and Customer Management Outsourcing, serving over 200 clients worldwide across many sectors.” Source: RevenueBase Database · checked Sep 8, 2026
4	Sensée	Indirect evidence	London, United KingdomHQ checked Sep 8, 2026	1,001-5,000	406 contacts →
	Indirect evidence “In 2004, Sensée was founded on a simple principle: bring work to people, not people to work.” Source: RevenueBase Database · checked Sep 8, 2026
5	Damco Solutions Limited	Strong evidence	London, United KingdomHQ checked Sep 8, 2026	1,001-5,000	327 contacts →
	Strong evidence “Damco Solutions Limited is a specialist software solutions and services & a business process outsourcing services company.” Source: RevenueBase Database · checked Sep 8, 2026
6	GI Outsourcing	Partial evidence	London, United KingdomHQ checked Sep 8, 2026	201-500	311 contacts →
	Partial evidence “GI Outsourcing is a UK-based accountants outsourcing firm.” Source: RevenueBase Database · checked Sep 8, 2026
7	Youpro Contact	Partial evidence	London, United KingdomHQ checked Sep 8, 2026	51-200	90 contacts →
	Partial evidence “A world class offshore outsourcing agency, with offices in London and Harare, we have access to some of the best educated, best spoken graduates you will find anywhere in the…” Source: RevenueBase Database · checked Sep 8, 2026
8	Xanadutec	Strong evidence	London, United KingdomHQ checked Sep 8, 2026	201-500	70 contacts →
	Strong evidence “We are a 400 member strong, specialist business process outsourcing (BPO) provider that caters to the diverse and complex information processing needs of todays corporation.” Source: RevenueBase Database · checked Sep 8, 2026
9	Qormotho	Partial evidence	London, United KingdomHQ checked Sep 8, 2026	51-200	66 contacts →
	Partial evidence “QORMOTHO is a global outsourcing company.” Source: RevenueBase Database · checked Sep 8, 2026
10	Support Adventure	Partial evidence	London, United KingdomHQ checked Sep 8, 2026	51-200	62 contacts →
	Partial evidence “Support Adventure is an outsourcing company that specializes in customer service and support.” Source: RevenueBase Database · checked Sep 8, 2026
11	Direct Response	Partial evidence	London, United KingdomHQ checked Sep 8, 2026	51-200	46 contacts →
	Partial evidence “Direct Response can provide outsourcing of voice, data and contact centre services for organisation from a global business to a one-man operation, delivering outstanding service…” Source: RevenueBase Database · checked Sep 8, 2026
12	Factotum	Indirect evidence	London, United KingdomHQ checked Sep 8, 2026	51-200	41 contacts →
	Indirect evidence “Welcome to Factotum-your secret weapon for streamlined business success!” Source: RevenueBase Database · checked Sep 8, 2026
13	Oakford Advisors LTD	Indirect evidence	London, United KingdomHQ checked Sep 8, 2026	11-50	24 contacts →
	Indirect evidence “Oakford Advisors Ltd, a Centralis Group company, is an outsourced business services firm which specialises in providing back-office support to start-up or existing companies…” Source: RevenueBase Database · checked Sep 8, 2026
14	The Knowledge Group	Indirect evidence	London, United KingdomHQ checked Sep 8, 2026	1-10	23 contacts →
	Indirect evidence “At tkg, we empower organisations to outsource better.” Source: RevenueBase Database · checked Sep 8, 2026
15	Kimon Services	Indirect evidence	London, United KingdomHQ checked Sep 8, 2026	51-200	16 contacts →
	Indirect evidence “Kimon Services provides high-quality outsourced staff across various industries and disciplines, including customer service, data entry, call centres, marketing and sales support…” Source: RevenueBase Database · checked Sep 8, 2026
16	Matlay	Strong evidence	London, United KingdomHQ checked Sep 8, 2026	51-200	15 contacts →
	Strong evidence “We are a full range Business Process Outsourcing company with innovative and cost-effective technology services to help our customers focus on their primary business objectives…” Source: RevenueBase Database · checked Sep 8, 2026
17	The Sales Centre	Partial evidence	London, United KingdomHQ checked Sep 8, 2026	1-10	14 contacts →
	Partial evidence “We are an outsourcing agency specializing in sales, marketing, and customer support.” Source: RevenueBase Database · checked Sep 8, 2026
18	Shorza	Strong evidence	London, United KingdomHQ checked Sep 8, 2026	11-50	14 contacts →
	Strong evidence “Shorza is a UK-focused Business Process Outsourcing (BPO) partner helping companies scale with South African talent.” Source: RevenueBase Database · checked Sep 8, 2026
19	Capita Business Services	Partial evidence	London, United KingdomHQ checked Sep 8, 2026	n/a	13 contacts →
	Partial evidence “Capita is the UK's leading FTSE100 outsourcing company.” Source: RevenueBase Database · checked Sep 8, 2026
20	IH Solutions	Indirect evidence	London, United KingdomHQ checked Sep 8, 2026	11-50	12 contacts →
	Indirect evidence “We bring our extensive industry experience to the hum-drum of finance, HR, operations, marketing and compliance so that you can focus on delivering the fun to your customers.” Source: RevenueBase Database · checked Sep 8, 2026
21	Anybpo	Strong evidence	London, United KingdomHQ checked Sep 8, 2026	1-10	11 contacts →
	Strong evidence “About AnyBPO: AnyBPO is an international consulting company specializing in Business Process Outsourcing (BPO) solutions.” Source: RevenueBase Database · checked Sep 8, 2026
22	ECO Outsourcing	Strong evidence	London, United KingdomHQ checked Sep 8, 2026	51-200	11 contacts →
	Strong evidence “At Eco Outsourcing, we specialize in providing managed business process solutions to businesses across Eurasia (UK, UAE, EU, MENA).” Source: RevenueBase Database · checked Sep 8, 2026
23	Alaouico	Indirect evidence	London, United KingdomHQ checked Sep 8, 2026	1-10	7 contacts →
	Indirect evidence “At alaouico, we understand the challenges businesses face with customer interactions-whether it's managing high call volumes, ensuring timely responses, or maintaining customer…” Source: RevenueBase Database · checked Sep 8, 2026
24	Elite LVL Services	Partial evidence	London, United KingdomHQ checked Sep 8, 2026	1-10	6 contacts →
	Partial evidence “ELITE LVL SERVICES UK is a Business Process Consulting Practice driven by three core values: People First, Exceptional Service, and Integrity.” Source: RevenueBase Database · checked Sep 8, 2026
25	Cxhero	Partial evidence	London, United KingdomHQ checked Sep 8, 2026	1-10	6 contacts →
	Partial evidence “Traditional outsourcing can leave you feeling like you're spinning your wheels.” Source: RevenueBase Database · checked Sep 8, 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: business process outsourcing 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 business process outsourcing firms.
Partial evidence: Its own public description names part of business process outsourcing firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name business process outsourcing 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 171 business process outsourcing firms based in London, United Kingdom

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Business process outsourcing firms based in London, United Kingdom at a glance

As of Sep 8, 2026

23.2%Verified-email coverage

3.6%Mobile-number coverage

163.0Average contacts per company

11-50Median size (employees)

99.4%Largest-city concentration · London

Sep 8, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

6,0100–30

41831–60

061–90

090–180

36180+

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 business process outsourcing 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 “business process outsourcing 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 business process outsourcing 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 business process outsourcing 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, 6,464 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 8, 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.

Business process outsourcing firms by metro in the United Kingdom

Business process outsourcing firms in London170

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 business process outsourcing 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 business process outsourcing firms are there based in London, United Kingdom?

RevenueBase identified 171 business process outsourcing 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?

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

Which city has the most business process outsourcing firms?

London leads with 170 headquartered companies, followed by Manchester (24) and Birmingham (9).

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 6,464 verified decision-maker contacts tracked across these 171 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 8, 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.