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Top BPO Service Companies for CSS

7 of 15 BPO service companies ranked on evidence in the Q4 2026 edition.

Between them, the 15 BPO service companies on this page cover IT services (13), iOS app (13), web development (12) and web design (12). They also list work in United Kingdom. 15 of them have written a profile you can read before you get in touch.

TrustList ranking

Q4 2026 edition

7 of 15 BPO service companies ranked on evidence held on 6 October 2026: client reviews, vetting, awards and facts each business states on its own website, which we read and date. Nobody pays to be placed.

Positions are fixed for the quarter; the next edition is due in January 2027.

How this is ranked About this edition

All BPO service companies 7 ranked SMEs 5 ranked

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The DDC Group
IT Services · iOS App · Web Development · Also in United Kingdom
Business process outsourcing and AI-enabled operations provider for logistics, energy, retail, banking, insurance and healthcare
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Why #1: Founded 1989 · Team of 5,000+, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Liberata
IT Services · iOS App · Web Design · Also in United Kingdom
Liberata is a UK business process services company that runs finance, payroll, customer contact and debt recovery work on behalf of organisations. It was established in 1975.
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Why #2: Founded 1975, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
FMP Global
IT Services · iOS App · Web Development · Also in United Kingdom
FMP Global provides outsourced payroll and HR services to employers in the UK and abroad.
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Why #3: In business 40+ years, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Sutherland
IT Services · iOS App · Web Development · Also in United States of America
Digital transformation company redesigning and automating business processes using AI, analytics and operations services
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Why #4: In business 30+ years, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
ESG Global
IT Services · iOS App · Web Development · Also in United Kingdom
ESG Global is an outsourcing company that runs offshore teams for clients through a UK management layer.
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Why #5: Founded 2005, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Sitel
IT Services · iOS App · Web Development · Also in United States of America
Sitel is a customer experience management group that handles customer contact for other companies.
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Why #6: Team of 75,000+, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Confluence
Also in Egypt
Confluence, trading as Confluence Technologies, supplies software and services for regulatory reporting, portfolio analytics and investor communications in the investment…
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Why #7: nothing checkable yet, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
Also listed, not yet ranked. We hold nothing checkable on these yet that ranks them here: no client review, vetting, award, expert review, or fact stated on their own website (and on a place ranking, where they are based). They follow in order of their TrustList Score. How TrustList ranks · Get vetted, free
Parseq
IT Services · iOS App · Web Development · Also in United Kingdom
UK business process outsourcing firm handling documents, finance, payroll and payments for large organisations and growing companies
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On record: Team of 2,000+, as stated on its own website, read 5 Oct 2026
Cardea
CMS · Also in Tamil Nadu and Karnataka
Cardea, run as Cardea Healthcare Solutions, is a healthcare training and consulting centre based in Bengaluru.
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DIG GmbH
IT Services · iOS App · Web Development · Also in Austria
DIG GmbH supplies digital spend management software for purchasing, finance and supply chain teams.
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FIS
IT Services · iOS App · Web Development · Also in United States of America
FIS, formally Fidelity Information Services, makes the software and infrastructure that banks, payment firms and investment managers run on.
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ICT Watchers
IT Services · iOS App · Web Development · Also in Italy
ICT Watchers is a business process outsourcing company. The information available lists a short set of services that a business can hand over to an outside team instead of running…
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Infinity
IT Services · iOS App · Web Development · Also in United Kingdom
Infinity is a business process outsourcing firm that handles sales and customer work for its clients.
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Paragon Customer Communications
IT Services · iOS App · Web Development · Also in United Kingdom
Paragon Customer Communications provides end-to-end customer communications services, reaching clients' customers across every channel.
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WNS Global Services
IT Services · iOS App · Web Development · Also in India
WNS Global Services is a business process management company. It combines industry knowledge with technology and analytics to run and change business operations for clients…
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