Company lists · Data refreshed September 2026
Top 25 Customer agencies based in the United Kingdom
RevenueBase identified 518 company matches for customer agencies associated with the United Kingdom as of September 2026 and tracks 18,578 professional contacts across them, including 3,265 with verified work emails. London is the largest hub.
This list covers company matches for customer agencies 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 21, 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.
The 25 largest customer agencies based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,991 contacts → | ||||
Exact match “We believe customers and employees should be looked after, and every interaction is an opportunity for a conversation and to learn more about them.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 2 | 1,839 contacts → | ||||
Exact match “We are Sigma Connected, we are different.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 3 | 1,622 contacts → | ||||
Exact match “We are Huntswood.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 4 | 1,244 contacts → | ||||
Exact match “Ascensos is now Firstsource.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 5 | 873 contacts → | ||||
Exact match “At Convergys Intelligent Contact, we build sustainable revenue streams for our clients.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 6 | 595 contacts → | ||||
Exact match “Kura is a global CX outsourcer.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 7 | 569 contacts → | ||||
Exact match “Vertex is a leader in BPO and Customer Management Outsourcing, serving over 200 clients worldwide across many sectors.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 8 | 534 contacts → | ||||
Exact match “Your world is changing at lightning speed; new business models, new technologies, new competitors, and new customers.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 9 | 490 contacts → | ||||
Exact match “Give your customers a voice with ResQ.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 10 | 327 contacts → | ||||
Exact match “Skilled talent, proven processes and leading technology.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 11 | 318 contacts → | ||||
Exact match “Ventrica is a global leader in delivering emotive CX through BPO.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 12 | 312 contacts → | ||||
Exact match “Here at The Contact Company, we add value for clients, working as trusted partners to manage and develop their customer contact processes.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 13 | 221 contacts → | ||||
Exact match “Edit are future-focused data and technology experts.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 14 | 205 contacts → | ||||
Exact match “Established since 1998 Clearanswer is an expert provider of contact centre solutions.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 15 | 162 contacts → | ||||
Exact match “We are a leading UK customer experience outsourcer, recently named Gold winners for L&D Team of the Year 2025, Best Contact Centre Culture (Large) 2024 and Outsourced Contact…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 16 | 140 contacts → | ||||
Exact match “Echoing our clients in every conversation.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 17 | 134 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 18 | 132 contacts → | ||||
Exact match “Dedicated and shared contact centre outsourcing operations.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 19 | 131 contacts → | ||||
Exact match “Route 101 offers award-winning customer engagement solutions that help you reduce operational costs, enhance efficiency, and deliver a next-generation customer experience (CX).” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 20 | 129 contacts → | ||||
Exact match “Founded in 2007, we are independent, knowledgeable and reliable.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 21 | 99 contacts → | ||||
Exact match “Our business is your business.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 22 | 98 contacts → | ||||
Exact match “Founded in 1988, RSVP is the oldest provider of contact centre services in the UK.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 23 | 90 contacts → | ||||
Exact match “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…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 24 | 85 contacts → | ||||
Exact match “Humanizing AI-Powered Customer Support The future of customer support is intelligent, efficient-and unmistakably human.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 25 | 83 contacts → | ||||
Exact match “We are FM Outsource, a modern customer service outsourcer.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “customer agencies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 518 customer agencies based in the United Kingdom
See the full list, filter by size, metro and specialty, and access 3,265 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Customer agencies based in the United Kingdom at a glance
As of Sep 21, 2026Companies by employee count
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 518 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 “customer agencies” 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 3,265 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 21, 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.
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 “customer agencies”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many customer agencies are there based in the United Kingdom?
RevenueBase identified 518 company matches for customer agencies 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?
Quantanite tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most customer agencies?
London leads with 196 company records, followed by Manchester (20) and Bristol (13).
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 3,265 professional contacts with verified work emails tracked across these 518 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 21, 2026.
Ready to reach these companies? Verified emails and direct dials for all 518 customer agencies based in the United Kingdom. Start with a free account, no credit card.
Download this list →Related lists
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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 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.
More company lists
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- Lists by location
- Lists A-Z
- New lists
- Customer agencies based in Sao Paulo, Brazil
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Company intelligence · public preview
Top 25 customer agencies based in the United Kingdom
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 518 matching company records for customer agencies based in the United Kingdom, with 18,578 tracked contacts and 3,265 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 21, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 customer agencies based in the United Kingdom
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  Quantanitequantanite.comHQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 1,991 contacts → |
“We believe customers and employees should be looked after, and every interaction is an opportunity for a conversation and to learn more about them.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Sigma Connected Groupsigmaconnected.comHQ: Birmingham, United KingdomReported employees: 1,001-5,000 | Birmingham, United Kingdom | 1,001-5,000 | Exact match | 1,839 contacts → |
“We are Sigma Connected, we are different.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Huntswoodhuntswood.com HQ: Reading, United KingdomReported employees: 1,001-5,000 | Reading, United Kingdom | 1,001-5,000 | Exact match | 1,622 contacts → |
“We are Huntswood.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Ascensosascensos.comHQ: Motherwell, United KingdomReported employees: 1,001-5,000 | Motherwell, United Kingdom | 1,001-5,000 | Exact match | 1,244 contacts → |
“Ascensos is now Firstsource.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Convergys Intelligent Contactconvergys.comHQ: Altrincham, United KingdomReported employees: 10001+ | Altrincham, United Kingdom | 10001+ | Exact match | 873 contacts → |
“At Convergys Intelligent Contact, we build sustainable revenue streams for our clients.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Kura CS LTDwearekura.comHQ: Glasgow, United KingdomReported employees: 1,001-5,000 | Glasgow, United Kingdom | 1,001-5,000 | Exact match | 595 contacts → |
“Kura is a global CX outsourcer.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Vertex Data Sciencevertexgroup.comHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 569 contacts → |
“Vertex is a leader in BPO and Customer Management Outsourcing, serving over 200 clients worldwide across many sectors.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Arvatoconnectarvatoconnect.co.ukHQ: Datchet, United KingdomReported employees: 501-1,000 | Datchet, United Kingdom | 501-1,000 | Exact match | 534 contacts → |
“Your world is changing at lightning speed; new business models, new technologies, new competitors, and new customers.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  RESQresqcs.co.ukHQ: Kingston Upon Hull, United KingdomReported employees: 1,001-5,000 | Kingston Upon Hull, United Kingdom | 1,001-5,000 | Exact match | 490 contacts → |
“Give your customers a voice with ResQ.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  ANT Marketingantmarketing.comHQ: Sheffield, United KingdomReported employees: 501-1,000 | Sheffield, United Kingdom | 501-1,000 | Exact match | 327 contacts → |
“Skilled talent, proven processes and leading technology.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Ventricaventrica.co.ukHQ: Southend-on-sea, United KingdomReported employees: 501-1,000 | Southend-on-sea, United Kingdom | 501-1,000 | Exact match | 318 contacts → |
“Ventrica is a global leader in delivering emotive CX through BPO.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  The Contact Companythecontactcompany.co.ukHQ: Birkenhead, United KingdomReported employees: 1,001-5,000 | Birkenhead, United Kingdom | 1,001-5,000 | Exact match | 312 contacts → |
“Here at The Contact Company, we add value for clients, working as trusted partners to manage and develop their customer contact processes.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  EDITedit.co.ukHQ: Bath, United KingdomReported employees: 51-200 | Bath, United Kingdom | 51-200 | Exact match | 221 contacts → |
“Edit are future-focused data and technology experts.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Clearanswer Call Centresclearanswer.co.ukHQ: Hull, United KingdomReported employees: 501-1,000 | Hull, United Kingdom | 501-1,000 | Exact match | 205 contacts → |
“Established since 1998 Clearanswer is an expert provider of contact centre solutions.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Interact Contact Centresinteractcc.comHQ: Richmond, United KingdomReported employees: 501-1,000 | Richmond, United Kingdom | 501-1,000 | Exact match | 162 contacts → |
“We are a leading UK customer experience outsourcer, recently named Gold winners for L&D Team of the Year 2025, Best Contact Centre Culture (Large) 2024 and Outsourced Contact…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Echo-U LTDecho-u.co.ukHQ: Newcastle Upon Tyne, United KingdomReported employees: 201-500 | Newcastle Upon Tyne, United Kingdom | 201-500 | Exact match | 140 contacts → |
“Echoing our clients in every conversation.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  SPARKhellospark.comHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 134 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 18 |  We ARE Wovenwearewoven.comHQ: Bristol, United KingdomReported employees: 1,001-5,000 | Bristol, United Kingdom | 1,001-5,000 | Exact match | 132 contacts → |
“Dedicated and shared contact centre outsourcing operations.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Route 101 LTDroute101.comHQ: Bristol, United KingdomReported employees: 51-200 | Bristol, United Kingdom | 51-200 | Exact match | 131 contacts → |
“Route 101 offers award-winning customer engagement solutions that help you reduce operational costs, enhance efficiency, and deliver a next-generation customer experience (CX).” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Orchestrathisisorchestra.comHQ: Woolwich, United KingdomReported employees: Not recorded | Woolwich, United Kingdom | Not recorded | Exact match | 129 contacts → |
“Founded in 2007, we are independent, knowledgeable and reliable.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Tchgroup The Consumer Helplinetchgroup.ukHQ: Swansea, United KingdomReported employees: 201-500 | Swansea, United Kingdom | 201-500 | Exact match | 99 contacts → |
“Our business is your business.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Rsvp Media Response LTDrsvp.co.ukHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 98 contacts → |
“Founded in 1988, RSVP is the oldest provider of contact centre services in the UK.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Youpro Contactyouprocontact.co.ukHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 90 contacts → |
“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…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Sirius Supportsirius-support.comHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 85 contacts → |
“Humanizing AI-Powered Customer Support The future of customer support is intelligent, efficient-and unmistakably human.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  FM Outsourcefmoutsource.comHQ: Bury, United KingdomReported employees: 201-500 | Bury, United Kingdom | 201-500 | Exact match | 83 contacts → |
“We are FM Outsource, a modern customer service outsourcer.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 518 company matches
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Customer agencies: dataset insights
September 21, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
516 records in the displayed employee bands.
2 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 518 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 21, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for customer agencies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many customer agencies did RevenueBase find based in the United Kingdom?
The saved snapshot records 518 matching company records, 18,578 tracked contacts and 3,265 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 21, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Customer agencies by geography
- Customer agencies based in Sao Paulo, Brazil
- Customer agencies based in Bangalore, India
- Customer agencies based in Hyderabad, India
- Customer agencies based in Mumbai, India
- Customer agencies based in New Delhi, India
- Customer agencies based in Noida, India
- Customer agencies based in Pune, India
- Customer agencies based in Karachi, Pakistan
- Customer agencies based in Lahore, Pakistan
- Customer agencies based in Atlanta, United States
- Customer agencies based in Austin, United States
- Customer agencies based in Chicago, United States
Browse the directory
Cite this list
RevenueBase Data Team. Top 25 customer agencies based in the United Kingdom. Snapshot: September 21, 2026. https://revenuebase.ai/companies/customer-agencies/united-kingdom.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Customer agencies based in Sao Paulo, Brazil
- Customer agencies based in Bangalore, India
- Customer agencies based in Hyderabad, India
- Customer agencies based in Mumbai, India
- Customer agencies based in New Delhi, India
- Customer agencies based in Noida, India
Company intelligence · public preview
Top 25 customer agencies based in the United Kingdom
RevenueBase records 518 matching company records for customer agencies based in the United Kingdom, with 18,578 tracked contacts and 3,265 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 21, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 customer agencies based in the United Kingdom
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Quantanitequantanite.com HQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 1,991 contacts → |
“We believe customers and employees should be looked after, and every interaction is an opportunity for a conversation and to learn more about them.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Sigma Connected Groupsigmaconnected.com HQ: Birmingham, United KingdomReported employees: 1,001-5,000 | Birmingham, United Kingdom | 1,001-5,000 | Exact match | 1,839 contacts → |
“We are Sigma Connected, we are different.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Huntswoodhuntswood.com HQ: Reading, United KingdomReported employees: 1,001-5,000 | Reading, United Kingdom | 1,001-5,000 | Exact match | 1,622 contacts → |
“We are Huntswood.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Ascensosascensos.com HQ: Motherwell, United KingdomReported employees: 1,001-5,000 | Motherwell, United Kingdom | 1,001-5,000 | Exact match | 1,244 contacts → |
“Ascensos is now Firstsource.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Convergys Intelligent Contactconvergys.com HQ: Altrincham, United KingdomReported employees: 10001+ | Altrincham, United Kingdom | 10001+ | Exact match | 873 contacts → |
“At Convergys Intelligent Contact, we build sustainable revenue streams for our clients.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Kura CS LTDwearekura.com HQ: Glasgow, United KingdomReported employees: 1,001-5,000 | Glasgow, United Kingdom | 1,001-5,000 | Exact match | 595 contacts → |
“Kura is a global CX outsourcer.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Vertex Data Sciencevertexgroup.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 569 contacts → |
“Vertex is a leader in BPO and Customer Management Outsourcing, serving over 200 clients worldwide across many sectors.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Arvatoconnectarvatoconnect.co.uk HQ: Datchet, United KingdomReported employees: 501-1,000 | Datchet, United Kingdom | 501-1,000 | Exact match | 534 contacts → |
“Your world is changing at lightning speed; new business models, new technologies, new competitors, and new customers.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | RESQresqcs.co.uk HQ: Kingston Upon Hull, United KingdomReported employees: 1,001-5,000 | Kingston Upon Hull, United Kingdom | 1,001-5,000 | Exact match | 490 contacts → |
“Give your customers a voice with ResQ.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | ANT Marketingantmarketing.com HQ: Sheffield, United KingdomReported employees: 501-1,000 | Sheffield, United Kingdom | 501-1,000 | Exact match | 327 contacts → |
“Skilled talent, proven processes and leading technology.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Ventricaventrica.co.uk HQ: Southend-on-sea, United KingdomReported employees: 501-1,000 | Southend-on-sea, United Kingdom | 501-1,000 | Exact match | 318 contacts → |
“Ventrica is a global leader in delivering emotive CX through BPO.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | The Contact Companythecontactcompany.co.uk HQ: Birkenhead, United KingdomReported employees: 1,001-5,000 | Birkenhead, United Kingdom | 1,001-5,000 | Exact match | 312 contacts → |
“Here at The Contact Company, we add value for clients, working as trusted partners to manage and develop their customer contact processes.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | EDITedit.co.uk HQ: Bath, United KingdomReported employees: 51-200 | Bath, United Kingdom | 51-200 | Exact match | 221 contacts → |
“Edit are future-focused data and technology experts.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Clearanswer Call Centresclearanswer.co.uk HQ: Hull, United KingdomReported employees: 501-1,000 | Hull, United Kingdom | 501-1,000 | Exact match | 205 contacts → |
“Established since 1998 Clearanswer is an expert provider of contact centre solutions.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Interact Contact Centresinteractcc.com HQ: Richmond, United KingdomReported employees: 501-1,000 | Richmond, United Kingdom | 501-1,000 | Exact match | 162 contacts → |
“We are a leading UK customer experience outsourcer, recently named Gold winners for L&D Team of the Year 2025, Best Contact Centre Culture (Large) 2024 and Outsourced Contact…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Echo-U LTDecho-u.co.uk HQ: Newcastle Upon Tyne, United KingdomReported employees: 201-500 | Newcastle Upon Tyne, United Kingdom | 201-500 | Exact match | 140 contacts → |
“Echoing our clients in every conversation.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | SPARKhellospark.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 134 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 18 | We ARE Wovenwearewoven.com HQ: Bristol, United KingdomReported employees: 1,001-5,000 | Bristol, United Kingdom | 1,001-5,000 | Exact match | 132 contacts → |
“Dedicated and shared contact centre outsourcing operations.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Route 101 LTDroute101.com HQ: Bristol, United KingdomReported employees: 51-200 | Bristol, United Kingdom | 51-200 | Exact match | 131 contacts → |
“Route 101 offers award-winning customer engagement solutions that help you reduce operational costs, enhance efficiency, and deliver a next-generation customer experience (CX).” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Orchestrathisisorchestra.com HQ: Woolwich, United KingdomReported employees: Not recorded | Woolwich, United Kingdom | Not recorded | Exact match | 129 contacts → |
“Founded in 2007, we are independent, knowledgeable and reliable.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Tchgroup The Consumer Helplinetchgroup.uk HQ: Swansea, United KingdomReported employees: 201-500 | Swansea, United Kingdom | 201-500 | Exact match | 99 contacts → |
“Our business is your business.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Rsvp Media Response LTDrsvp.co.uk HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 98 contacts → |
“Founded in 1988, RSVP is the oldest provider of contact centre services in the UK.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Youpro Contactyouprocontact.co.uk HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 90 contacts → |
“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…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Sirius Supportsirius-support.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 85 contacts → |
“Humanizing AI-Powered Customer Support The future of customer support is intelligent, efficient-and unmistakably human.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | FM Outsourcefmoutsource.com HQ: Bury, United KingdomReported employees: 201-500 | Bury, United Kingdom | 201-500 | Exact match | 83 contacts → |
“We are FM Outsource, a modern customer service outsourcer.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 518 company matches
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Customer agencies: dataset insights
September 21, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
516 records in the displayed employee bands.
2 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 518 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 21, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for customer agencies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many customer agencies did RevenueBase find based in the United Kingdom?
The saved snapshot records 518 matching company records, 18,578 tracked contacts and 3,265 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 21, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
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Cite this list
RevenueBase Data Team. Top 25 customer agencies based in the United Kingdom. Snapshot: September 21, 2026. https://revenuebase.ai/companies/customer-agencies/united-kingdom.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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