Company lists · Data refreshed September 2026

Top 25 Outbound sales agencies based in the United Kingdom

RevenueBase identified 1,001 company matches for outbound sales agencies associated with the United Kingdom as of September 2026 and tracks 8,406 professional contacts across them, including 1,558 with verified work emails and 453 with mobile numbers. London is the largest hub.

This list covers company matches for outbound sales 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 3, 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 3, 2026 How this list was built
1,001Companies
8,406Contacts tracked
1,558Verified emails
453Mobile numbers
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The 25 largest outbound sales agencies based in the United Kingdom

Ranked by team size
Top 25 of 1,001 company matches for outbound sales agencies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 3, 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 matchLondon, United KingdomHQ recorded Sep 3, 2026201-500417 contacts →

Exact match

“MVF powers growth for our clients by connecting them to potential customers.”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
2Exact matchBrighton, United KingdomHQ recorded Sep 3, 2026201-500242 contacts →

Exact match

“The Telemarketing Company is one of the UK's most trusted telemarketing agencies, delivering flexible, high-quality voice services, including pre and post sales research…”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
3Exact matchExeter, United KingdomHQ recorded Sep 3, 202651-200123 contacts →

Exact match

“Since 2016, Air Marketing has been the trusted outsourced sales and lead generation agency in the UK for ambitious B2B businesses.”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
4Exact matchBirmingham, United KingdomHQ recorded Sep 3, 202651-200120 contacts →

Exact match

“GCL, with its unique, non-scripted approach to telemarketing and related marketing services, has for over 30 years established an enviable reputation for providing winning lead…”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
5Exact matchDoxford International Business Park, United KingdomHQ recorded Sep 3, 20261,001-5,000115 contacts →

Exact match

“EC Outsourcing is one of the UK's leading outsourced contact centres.”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
6Exact matchNewcastle Upon Tyne, United KingdomHQ recorded Sep 3, 202651-200114 contacts →

Exact match

“More than SDR Outsourcing.”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
7Exact matchGlasgow, United KingdomHQ recorded Sep 3, 202651-20096 contacts →

Exact match

“Pursuit Marketing are Experts in Demand Generation, Telemarketing, Digital Marketing and Creative Design - your 360 Marketing Provider.”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
8Exact matchSheffield, United KingdomHQ recorded Sep 3, 2026201-50075 contacts →

Exact match

“Voice is an agency that specialises in customer acquisition, development and retention programs.”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
9Exact matchHitchin, United KingdomHQ recorded Sep 3, 202651-20065 contacts →

Exact match

“Excelerate360 offers business development and sales outsourcing services for B2B software and technology companies in the UK, Europe, and North America.”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
10Exact matchRomsey, United KingdomHQ recorded Sep 3, 2026201-50055 contacts →

Exact match

“Employing over 250 staff, we are a well-established, highly regarded and successful outsourced multi-channel contact centre.”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Sep 3, 202651-20049 contacts →

Exact match

“At Fly Pie, sales outsourcing isn’t a “done-for-you” service, it’s a growth engine we build with you.”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
12Exact matchEllesmere Port, United KingdomHQ recorded Sep 3, 202651-20045 contacts →

Exact match

“Advance Connects are a B2B telemarketing, lead generation & appointment scheduling experts, operating within various sectors including construction, built environment, industrial…”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
13Exact matchLeeds, United KingdomHQ recorded Sep 3, 202651-20043 contacts →

Exact match

“B2B and B2C outsourced Telemarketing agency.”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
14Exact matchLeeds, United KingdomHQ recorded Sep 3, 202651-20039 contacts →

Exact match

“The problem with B2B growth isn't a lack of activity.”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
15Exact matchLondon, United KingdomHQ recorded Sep 3, 2026201-50039 contacts →

Exact match

“At Stack Solutions Group, we help ambitious brands grow faster, smarter, and more efficiently - across any market.”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
16Exact matchEwell, United KingdomHQ recorded Sep 3, 202651-20035 contacts →

Exact match

“1 Stop Data offers the best of breed Marketing, Lead Generation and Call Centre services.”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
17Exact matchPortsmouth, United KingdomHQ recorded Sep 3, 202651-20032 contacts →

Exact match

“Working with clients across a variety of sectors, Paragon is a leading provider of B2B lead generation and appointment setting marketing projects with vast experience in creating…”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
18Exact matchLeeds, United KingdomHQ recorded Sep 3, 202651-20032 contacts →

Exact match

“Telu is the complete business solution for generating leads and revenue for your business.”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
19Exact matchManchester, United KingdomHQ recorded Sep 3, 2026201-50027 contacts →

Exact match

“Since SLM Connect started up as a contact centre in 2008, we've supplied more than customers to our clients.”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
20Exact matchGlasgow, United KingdomHQ recorded Sep 3, 202651-20026 contacts →

Exact match

“Established in 1988 in London as Hotlines Telemarketing Ltd, the Glasgow branch (which was established in June rebranded as 1Call Direct in October 2003.”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
21Exact matchEast Kilbride, United KingdomHQ recorded Sep 3, 202651-20019 contacts →

Exact match

“AGO Outsourcing is a leading provider of outsourced business services, including inbound and outbound customer service and outbound sales as well as social media engagement…”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
22Exact matchLondon, United KingdomHQ recorded Sep 3, 202651-20016 contacts →

Exact match

“Big Wolf Marketing - Leaders in B2B Telemarketing, Lead Generation & Appointment Setting With a vast combined experience, implementing established and cutting edge innovative…”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
23Exact matchLondon, United KingdomHQ recorded Sep 3, 202651-20016 contacts →

Exact match

“ADDS Corporation is a one-stop marketplace for the best B2B Marketers, Agencies, Publishers, and Lead Generation Solution Providers.”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
24Exact matchLondon, United KingdomHQ recorded Sep 3, 202651-20012 contacts →

Exact match

“Welcome to Callent Tech, The Future of B2B Demand Generation.”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase
25Exact matchLondon, United KingdomHQ recorded Sep 3, 202651-20011 contacts →

Exact match

“We increase sales leads by 50% and achieve 99% customer satisfaction with our UK- and US-based team.”

Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase

Showing 25 of 1,001 outbound sales agencies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 1,558 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Outbound sales agencies based in the United Kingdom at a glance

As of Sep 3, 2026
18.5%Verified-email coverage
5.4%Mobile-number coverage
8.4Average contacts per company
1-10Median size (employees)
32.6%Largest-city concentration · London
Sep 3, 2026Page data refreshed

Companies by employee count

1-10
632
11-50
267
51-200
76
201-500
16
501-1,000
1
1,001-5,000
2
10001+
1

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

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 “outbound sales 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 1,558 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 3, 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 “outbound sales agencies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many outbound sales agencies are there based in the United Kingdom?

RevenueBase identified 1,001 company matches for outbound sales 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?

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

Which city has the most outbound sales agencies?

London leads with 326 company records, followed by Manchester (56) and Birmingham (27).

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 1,558 professional contacts with verified work emails tracked across these 1,001 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 3, 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 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.