Discover the top-performing call centres in the United Kingdom that provide specialized services at the highest standards to help businesses of all sizes deliver a great customer experience. Browse their rates, reviews, size and more using our custom filters.

Best United Kingdom Call Center Service Providers Rankings

4 Companies - Rankings updated: September 05, 2026

Every agency on DesignRush meets evaluation criteria around expertise and client feedback to empower informed choices. Some listings include paid partnerships.

Expertise
Energy & Mining
Budget
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United Kingdom × Energy & Mining × Sort by: Number of Reviews × Clear Filters

  • Munzai Solutions

    SDR Teams, Lead Generation & Call Center Services for B2B Companies

    Munzai Solutions provides B2B call center services covering cold calling, inbound call management, and customer support, with each engagement staffed by dedicated SDRs working 40 hours per week. The call center company's packages include a US-based dialer, project manager, and weekly reporting...

    Top Services:

    • Customer Support
    • Business Consulting
    • Call Centers
    • Email Marketing
    • CRM Consulting
    • Show more
    Location
    Manchester, United Kingdom
    Number of Employees
    Under 49
    Average Hourly Rate
    $35/hr
    Minimal Budget
    $10,000 - $25,000
    Portfolios Count
    12 Projects Listed

    Munzai Solutions Services

    • Customer Support
    • Business Consulting
    • Call Centers
    • Email Marketing
    • CRM Consulting
    • Managed Services
    • BPO
    • Phone Answering Services
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Souqh
    • Maxyfi
    • Konch
    • Skriber
    Data sourced from the agency's DesignRush profile

    Munzai Solutions Reviews & Testimonials

    • Davey Warren 🍐
      Davey Warren 🍐 CEO at Pearagon
      5.0 ★

      Outbound Review from Davey Warren 🍐

      Munzai Solutions has been a great partner for our outbound outreach. What stood out most was their communication. They checked in with us daily and weekly, kept us updated every step of the way, and worked closely with us to identify our target clients and the best directions to pursue. That level of consistent communication made the whole engagement feel efficient and collaborative, and it is a big reason we felt we got the best bang for our buck. We enjoyed working with them and would recommend them to other companies looking for a communicative, responsive outbound partner.

    • Sam Bartow Moreno
      Sam Bartow Moreno Founding GTM Director at CourtNexa
      5.0 ★

      Appointment Setting Review from Sam Bartow Moreno

      Munzai Solutions are amazing to work with. They got started immediately and booked multiple meetings in the first few days. I’m very happy with the results and the support they offered us. If you’d like to ask any questions about the service feel free to contact me at +1 458 600 8797 I’m very satisfied. And would highly recommend them.

    • Brian Oltmanns
      Brian Oltmanns CEO at GoFindBuild
      5.0 ★

      Call Centers Review from Brian Oltmanns

      I am very happy with this team and their performance. They were organized, provided consistent updates, and always made suggestions to pivot if results were falling short. I would highly recommend them.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
    Visit Website View Profile
    4.8 4.8 (19)

  • Service 800

    Customer Experience Consultants

    For more than 30 years, SERVICE 800 has been designing programs and providing resources to measure Customer Experience every day. The SERVICE 800 methodology delivers the accurate metrics you need to build and measure an effective customer journey map. SERVICE 800 programs reveal the actions and behaviors...

    Top Services:

    • Call Centers
    • Market Research
    Location
    London, United Kingdom
    Number of Employees
    250 - 499

    Service 800 Services

    • Call Centers
    • Market Research
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Johnson Controls
    • Johnson & Johnson Surgical Vision
    • Grundfos North America
    Data sourced from the agency's DesignRush profile
    Visit Website View Profile

  • Gigaleads

    The reliable and consistent source of hot leads.

    We are the only Netherlands-based marketing agency that guarantees profitable marketing campaigns. If our campaigns are not profitable, you just don't pay us - easy as that. Feel free to book a call and discover the magic of Gigaleads today...

    Top Services:

    • Social Media Marketing
    • Media Buying
    • Advertising
    • Email Marketing
    • CRO
    • Show more
    Location
    London, United Kingdom
    Number of Employees
    Under 49
    Minimal Budget
    $1,000 - $10,000

    Gigaleads Services

    • Social Media Marketing
    • Media Buying
    • Advertising
    • Email Marketing
    • CRO
    • Call Centers
    • Business Consulting
    • Video Marketing
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Ernst Adviesgroep B.V.
    • Alarm
    • Diamondflame
    • NL Zonnepanelen
    • BeGood
    • Bongo Solar
    • SMC Movement
    • Novulo Buildings
    • Flexwoning op Maat
    • WebActueel
    Data sourced from the agency's DesignRush profile

    Gigaleads Reviews & Testimonials

    • MSM Property Fund Marketing
      MSM Property Fund Marketing Review from Google
      5.0 ★

      MSM Property Fund Marketing's Review Sourced from Google

      Very professional team. Despite a tricky first month, we've received qualified leads above expectations for the last 3 months running. The team are very proactive and transparent. Thanks!

    • Sem Verkerk
      Sem Verkerk Review from Google
      5.0 ★

      Sem Verkerk's Review Sourced from Google

      Gigaleads truly impressed me. From the initial contact to the final results, everything was well-organized and highly professional. What stood out most: they think along with you, act fast, and stick to their promises. No empty words, just leads that actually convert. My calendar is filling up with high-quality appointments. For entrepreneurs who want real growth without the noise, this is the team to work with. Great job Gigaleads!

    • Kevin Raoult
      Kevin Raoult Review from Google
      5.0 ★

      Kevin Raoult's Review Sourced from Google

      Hired Gigaleads for a one off project in the NL, to drive client acquisition in the renewable energy field. So far I'm extremely pleased. Very attentive team & we're already seeing positive ROI, thanks guys! Kevin

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
    Visit Website View Profile
    4.6 4.6 (68)

  • Voicentric

    Marketing Science Globally

    Voicentric are specialists in scientific marketing for Life and Materials Science companies. We deliver intelligent telemarketing and B2B lead generation that connects you directly with decision-makers worldwide. Our multilingual team excels at engaging scientists with complex technical information, building...

    Top Services:

    • Direct Marketing
    • Call Centers
    • Digital Marketing
    • Advertising
    • Event Marketing
    • Show more
    Location
    Durham, United Kingdom
    Number of Employees
    50 - 99
    Average Hourly Rate
    $47/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    5 Projects Listed

    Voicentric Services

    • Direct Marketing
    • Call Centers
    • Digital Marketing
    • Advertising
    • Event Marketing
    • Market Research
    • Phone Answering Services
    • Customer Support
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Food and Beverage Industry
    • Corporate Services Industry
    • Health Care Industry
    Data sourced from the agency's DesignRush profile
    Visit Website View Profile
    4.4 4.4 (7)

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