Top 50 Telemarketing Companies in London
The Best of December 2025Looking for a top telemarketing service in London?
With so many companies telemarketing in today’s world, it can be difficult for your company’s calls to stand out amongst the competition. Partnering with a telemarketing service can help your company reach the maximum amount of customers.
To assist you in your search for a partner, we’ve compiled this list of the top telemarketing companies in London. Browse descriptions, feedback, and awards to find which can best suit your company’s needs.
List of the Best London Telemarketing Services
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1$1,000+1,000 - 9,999 employeesLondon, EnglandRead More
Quantanite is a professional services company based in London and has offices in Johannesburg and Dhaka, Bangladesh. The company, founded in 2014, has more than 1,000 employees and provides non-voice BPO/back office services, voice services, transcription, AI, and email marketing services. Quantanite serves small and larger-sized companies in various industries that include automotive, business services, and consumer products & services.
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Just ParkIndustries
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2Undisclosed50 - 249 employeesLondon, EnglandAbacus Cambridge Partners, an ERP consulting and SI company, is based in London, England; Dubai, United Arab Emirates; Riyadh, Saudi Arabia and New York, New York. They focus on ERP consulting and SI, BI & big data consulting & SI, Custom Software Development, Call Center Services, and more and were founded in 2017.Read More
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Hafilat Industry LLCIndustries
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3$1,000+250 - 999 employeesLondon, EnglandRead More
CALLCARE is a midsize call center service launched in 1998. Their services include voice services and non-voice bpo/back office services. The company is based in London, United Kingdom.
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4$1,000+50 - 249 employeesLondon, EnglandTask Virtual is a SEO company. The midsize Kolkata, India-based firm was founded in 2016. Their services include Search Engine Optimization, Back Office Outsourcing, Social Media Marketing, Content Marketing, and more.Read More
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5$1,000+250 - 999 employeesLondon, EnglandOnline Giants is a call center founded in 2013. The company offers Call Center Services and Customer Service Outsourcing.Read More
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6$250,000+1,000 - 9,999 employeesLondon, EnglandAbacus Outsourcing is a call center company. Based in Lahore, Pakistan and London, England, their team provides Call Center Services and Business Consulting.Read More
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7Undisclosed10,000+ employeesLondon, EnglandWebhelp, a Customer Service Outsourcing company, was established in 2000. The large team provides Customer Service Outsourcing and Call Center Services.Read More
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8$1,000+50 - 249 employeesLondon , EnglandTelemarketingPower.com is an answering service company. Their midsize team is located in Surry Hills, Australia and Los Angeles, California. Their services include Call Center Services.Read More
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9$5,000+1,000 - 9,999 employeesLondon , EnglandIntegreon, a large Back Office Outsourcing company, is headquartered in New York, New York and Makati, Philippines. Their services include Back Office Outsourcing and Transcription.Read More
Clients
MicrosoftIndustries
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10$5,000+10 - 49 employeesLondon , EnglandFounded in 2018, Call Vidia is a Customer Service Outsourcing company. The company offers Customer Service Outsourcing and Back Office Outsourcing, and is small.Read More
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11$1,000+10 - 49 employeesLondon, EnglandIRecruit Tech is a Back Office Outsourcing company founded in 2016. Their team provides Back Office Outsourcing and Call Center Services.Read More
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12$1,000+10 - 49 employeesHarlow, EnglandEstablished in 2004, Zebra Connexions Ltd is an answering service. The small team specializes in Call Center Services and Back Office Outsourcing.Read More
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13Undisclosed50 - 249 employeesLondon, EnglandMicrotalk is a call center service. Their team is in London, England and Kolkata, India and provides Call Center Services.Read More
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14$1,000+2 - 9 employeesLondon, EnglandSugar Beet is a Business Consulting company. The small London, England-based team offers Business Consulting and Call Center Services. The firm was founded in 2015.Read More
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15Undisclosed50 - 249 employeesLondon, EnglandCall center company Smart Call Solutions Pvt Ltd was founded in 2022. The team offers Call Center Services and Digital Strategy.Read More
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16$1,000+10 - 49 employeesLondon, EnglandMedlysis is a telephone answering service founded in 2023. Headquartered in London, England and California, California, their small team offers Call Center Services, Recruitment Process Outsourcing, and Customer Service Outsourcing.Read More
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17$1,000+10 - 49 employeesLondon, EnglandThe Lead Generation Company is a small non-voice bpo/back office services and phone answering service. The Glasgow, United Kingdom-based agency was established in 2012. Their services include non-voice bpo/back office services and voice services.Read More
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18Undisclosed10 - 49 employeesRadlett, EnglandMarketing Strategy company The Covalence was established in 2018. Headquartered in Rawalpindi, Pakistan and Radlett, England, the team provides Marketing Strategy and Web Development.Read More
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19$1,000+250 - 999 employeesLondon, EnglandEmerj.io, an answering service company, is based in London, England. The team offers Call Center Services and Tax Law.Read More
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20$1,000+10 - 49 employeesHounslow, EnglandL2 Global Technologies pvt ltd. Is a CRM consulting and SI company. The Hounslow, England-based agency was launched in 2014. Their services include CRM consulting and SI and Web Development.Read More
Clients
PennarIndustries
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21Undisclosed1,000 - 9,999 employeesLondon, EnglandGenisys Group is an user experience company. Based in London, England and Bengaluru, India, the company offers UX/UI Design and IT strategy consulting.Read More
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22$50,000+10 - 49 employeesLondon, EnglandCustomer Service Outsourcing company Web3 Community Management is in San Francisco, California and London, England. They provide Customer Service Outsourcing and Sales Outsourcing.Read More
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23$1,000+10 - 49 employeesLondon, EnglandRSVP is a Customer Service Outsourcing company. Their small team is located in London, England. Their services include Customer Service Outsourcing and Back Office Outsourcing.Read More
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24Undisclosed10 - 49 employeesBricket Wood, EnglandGSA Business Development Ltd is a Marketing Strategy company. Launched in 2000, the company is based in Bricket Wood, England. Their team focuses on Marketing Strategy and Business Consulting.Read More
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25$10,000+2 - 9 employeesWembley, EnglandCybrosys Communications is a call center company based in Wembley, England and Abbottabad, Pakistan. Their services include Call Center Services.Read More
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26UndisclosedFreelancer employeesLondon, EnglandBOOSTER is a small London, England-based Sales Outsourcing company. Their services include Sales Outsourcing and Business Consulting.Read More
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27$1,000+10 - 49 employeesHorsham , EnglandRead More
Small direct marketing company Virtual Sales Limited, is in Horsham , United Kingdom. They specialize in direct marketing and market research and were launched in 2001.
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28$1,000+2 - 9 employeesLondon, EnglandBack Office Outsourcing company The Business Outsourcing Company is based in London, England and Ripon, England. They provide Back Office Outsourcing and Call Center Services.Read More
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29$1,000+10 - 49 employeesDorking, EnglandNovus Business Connections Limited, a small Direct Marketing company, is based in Dorking, England. Their services include Direct Marketing and Customer Service Outsourcing.Read More
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30$1,000+250 - 999 employeesBorough Green, EnglandCustomer Service Outsourcing company Clearanswer specializes in Customer Service Outsourcing and Call Center Services. They are based in Borough Green, England.Read More
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