Top Call Center Services & Voice Services in London
-
Featured
What are Featured Providers?
$1,000+< $25 / hr250 - 999Serves London, EnglandServices provided
See all 26 projectsSimply Contact is a professional contact center services company specializing in inbound and outbound call handling, customer support services, and telephonic support across various languages and channels. Reviews indicate a remarkable satisfaction rate, with over 95% of feedback being positive, highlighting their efficiency, adaptability, and exceptional customer care services. Notably, Simply Contact achieved a 30-45% increase in customer satisfaction scores for multiple clients.
-
$10,000+Undisclosed250 - 999London, England
Services provided
MarketOne International is an Email Marketing company founded in 1998. Their services include Email Marketing and Call Center Services.
Read more -
UndisclosedUndisclosed10 - 49Lancing, England
Services provided
UK Pick & Pack is a Fulfillment company. Their team is headquartered in Lancing, England and provides Fulfillment and Warehousing & Distribution.
Read more -
$1,000+< $25 / hr2 - 9Hounslow , England
Services provided
Computer Call is a telephone answering service. They are headquartered in Hounslow , England and have small team. Their services include Call Center Services and Customer Service Outsourcing.
Read more -
$1,000+< $25 / hr10 - 49London, England
Services provided
Confero, a call center, is located in Wembley, England and London, England. Their services include Call Center Services and Customer Service Outsourcing.
Read more -
UndisclosedUndisclosed10 - 49London, England
Services provided
Kindico Digital Marketing Agency Ltd is an Affiliate Marketing and Sales Outsourcing company founded in 2016. The team specializes in Affiliate Marketing and Sales Outsourcing.
Read more -
UndisclosedUndisclosed250 - 999London, England
Services provided
GDCC (Global Data Collection Company), a midsize Market Research company, is based in Rotterdam, Netherlands and Cincinnati, Ohio. Their services include Market Research and Call Center Services.
Read more -
UndisclosedUndisclosed2 - 9London, England
Services provided
Effortless Digital Services is a social media marketing agency. Located in London, England, the firm was launched in 2018. Their team specializes in Social Media Marketing and Content Marketing.
Read more -
$10,000+$150 - $199 / hr10 - 49London, England
Services provided
Snap International is a Transcription company. They are based in London, England and have small team. Their services include Transcription and Call Center Services.
Read more -
$10,000+$150 - $199 / hr2 - 9Farnham Common, England
Services provided
Catalyst Communications #TalkingTechPR is a call center service. The firm is based in Farnham Common, England. Their team offers Call Center Services and Public Relations.
Read more -
$10,000+$150 - $199 / hr2 - 9London, England
Services provided
Raksha PR is a public relations company founded in 2003. The team specializes in Public Relations and Call Center Services and is based in London, England.
Read more -
$10,000+$150 - $199 / hr10 - 49London , England
Services provided
3x1 Public Relations, a branding agency, focus on Branding and Call Center Services. They were founded in 2001.
Read more -
$10,000+$150 - $199 / hr10 - 49Burgess Hill, England
Services provided
FML Public Relations is a small Burgess Hill, England-based branding agency. Their services include Branding and Call Center Services.
Read more -
$10,000+$150 - $199 / hr2 - 9London, England
Services provided
Headquartered in Birmingham, England and London, England, S&X Media Ltd is a small branding company. The team provides Branding and Call Center Services.
Read more -
$10,000+$150 - $199 / hr2 - 9Reading , England
Services provided
Call center company Hensman Consulting Intl LLP offers Call Center Services and IT managed services. They were established in 2006.
Read more -
UndisclosedUndisclosed2 - 9London, England
Services provided
Established in 2010, GA4-Search is a small SEO agency based in London, England. Their team provides Search Engine Optimization and UX/UI Design.
Read more
Share your project goals, and we’ll connect you with verified partners who fit your budget and timeline.
Get My Matches
Tell us what you need — we’ll match you with top agencies in minutes.
Get My MatchesWhy Trust Clutch
At Clutch, we believe trust is the foundation of every business relationship. Our mission is to help buyers make confident, data-backed decisions informed by real client experiences.
Every review on Clutch undergoes a rigorous, human-led verification process to make sure it’s valid. Our team of specialists confirms the identity of each reviewer, ensures the project is legitimate, and only publishes reviews that meet our strict criteria.
Verification doesn’t stop at the point of publication. Our Trust & Safety team routinely audits older reviews against our guidelines. When reviews fall short of our standards, we remove them.
We evaluate service providers using a structured methodology that combines:
- In-depth client interviews and ratings
- Comprehensive project details
- Market presence
- Portfolio examples and industry recognition
This data powers tools like the Leaders Matrix, which helps you compare agencies directly. Our research team curates rankings by weighing verified reviews most heavily, so the most trusted and experienced providers rise to the top.
Using this unique combination of verified client feedback and provider-supplied insights, Clutch distills the most important details into clear, digestible summaries so you have everything you need to make confident, informed decisions quickly.
We take fraud seriously. Providers who violate our guidelines may face lower rankings, restricted visibility, or removal from the platform altogether.
Clutch’s commitment to transparency is ongoing. We’re constantly refining our systems to protect the integrity of reviews and support you in finding the right agency.
List of the Top 15 London Call Center Companies & Voice Services
-
$1,000+< $25 / hr50 - 249Ed, Sweden
Ability to deliver
38.9/40.019.8/20 Reviews10/10 Clients & Experience9.2/10 Market PresenceService focus
10% Call Center Services80% Sales Outsourcing10% Other -
$1,000+< $25 / hr50 - 249Dover, DE
Ability to deliver
37.9/40.020/20 Reviews10/10 Clients & Experience7.9/10 Market PresenceService focus
10% Call Center Services80% Sales Outsourcing10% Other -
$1,000+< $25 / hr1,000 - 9,999London, England
Ability to deliver
30.3/40.015.6/20 Reviews7.6/10 Clients & Experience7.1/10 Market PresenceService focus
20% Call Center Services20% Sales Outsourcing60% Other -
$25,000+$300+ / hr50 - 249Reigate, England
Ability to deliver
33.9/40.015.2/20 Reviews9.2/10 Clients & Experience9.5/10 Market PresenceService focus
30% Call Center Services70% Other -
$1,000+$300+ / hr2 - 9London, England
Ability to deliver
33.9/40.018.2/20 Reviews10/10 Clients & Experience5.7/10 Market PresenceService focus
30% Sales Outsourcing70% Other -
$1,000+$50 - $99 / hr10 - 49Ipswich, England
Ability to deliver
35.5/40.016.2/20 Reviews10/10 Clients & Experience9.3/10 Market PresenceService focus
15% Sales Outsourcing85% Other -
UndisclosedUndisclosed50 - 249London, England
Ability to deliver
32/40.015.8/20 Reviews8.2/10 Clients & Experience8/10 Market PresenceService focus
10% Call Center Services10% Sales Outsourcing80% Other -
$5,000+$150 - $199 / hr10 - 49London, England
Ability to deliver
34.2/40.015.8/20 Reviews8.8/10 Clients & Experience9.5/10 Market PresenceService focus
10% Sales Outsourcing90% Other -
$1,000+< $25 / hr2 - 9London, England
Ability to deliver
25.9/40.015.8/20 Reviews6.1/10 Clients & Experience4/10 Market PresenceService focus
65% Sales Outsourcing35% Other -
$1,000+$100 - $149 / hr10 - 49London, England
Ability to deliver
28/40.016.8/20 Reviews6.3/10 Clients & Experience4.9/10 Market PresenceService focus
40% Sales Outsourcing60% Other -
$5,000+$50 - $99 / hr10 - 49Tallinn, Estonia
Ability to deliver
27.1/40.016.6/20 Reviews6.5/10 Clients & Experience4/10 Market PresenceService focus
40% Sales Outsourcing60% Other -
$5,000+$100 - $149 / hr10 - 49Kingston Upon Thames, England
Ability to deliver
27.6/40.015.8/20 Reviews6.7/10 Clients & Experience5.2/10 Market PresenceService focus
30% Sales Outsourcing70% Other -
$1,000+Undisclosed2 - 9London, England
Ability to deliver
21.9/40.016/20 Reviews1.9/10 Clients & Experience4/10 Market PresenceService focus
70% Sales Outsourcing30% Other -
$1,000+< $25 / hr50 - 249Kolkata, India
Ability to deliver
28.4/40.017.8/20 Reviews2.2/10 Clients & Experience8.3/10 Market PresenceService focus
10% Call Center Services90% Other -
$1,000+$300+ / hr2 - 9London, England
Ability to deliver
28.3/40.016.6/20 Reviews6.4/10 Clients & Experience5.2/10 Market PresenceService focus
10% Sales Outsourcing90% Other -
$1,000+< $25 / hr1,000 - 9,999Sandy, UT
Ability to deliver
18.4/40.012.4/20 Reviews0/10 Clients & Experience6/10 Market PresenceService focus
50% Call Center Services50% Other -
$1,000+$50 - $99 / hr10 - 49London, England
Ability to deliver
26.2/40.014.6/20 Reviews5.7/10 Clients & Experience6/10 Market PresenceService focus
10% Call Center Services90% Other -
$1,000+< $25 / hr250 - 999London, England
Ability to deliver
16.3/40.01.6/20 Reviews7.6/10 Clients & Experience7.1/10 Market PresenceService focus
40% Call Center Services60% Other -
Undisclosed$25 - $49 / hr10 - 49Harlow, England
Ability to deliver
20.1/40.014.6/20 Reviews1.4/10 Clients & Experience4/10 Market PresenceService focus
35% Call Center Services65% Other -
$5,000+$100 - $149 / hr2 - 9London, England
Ability to deliver
20.6/40.016.6/20 Reviews0/10 Clients & Experience4/10 Market PresenceService focus
20% Sales Outsourcing80% Other -
$100,000+$100 - $149 / hr10 - 49New York, NY
Ability to deliver
13.2/40.00/20 Reviews8.5/10 Clients & Experience4.7/10 Market PresenceService focus
70% Sales Outsourcing30% Other -
UndisclosedUndisclosed50 - 249London, England
Ability to deliver
18.1/40.013/20 Reviews0/10 Clients & Experience5.2/10 Market PresenceService focus
10% Call Center Services90% Other -
$5,000+Undisclosed10,000+Austin, TX
Ability to deliver
7.9/40.00/20 Reviews0/10 Clients & Experience7.9/10 Market PresenceService focus
20% Call Center Services80% Other -
$1,000+< $25 / hr250 - 999London, England
Ability to deliver
7.6/40.00/20 Reviews3.6/10 Clients & Experience4/10 Market PresenceService focus
80% Call Center Services20% Other -
$250,000+< $25 / hr1,000 - 9,999Lahore, Pakistan
Ability to deliver
7.6/40.00/20 Reviews0/10 Clients & Experience7.6/10 Market PresenceService focus
35% Call Center Services15% Sales Outsourcing50% Other -
$1,000+$25 - $49 / hr2 - 9Uxbridge, England
Ability to deliver
7.5/40.00/20 Reviews1.8/10 Clients & Experience5.7/10 Market PresenceService focus
80% Sales Outsourcing20% Other -
UndisclosedUndisclosed10,000+Paris, France
Ability to deliver
7.2/40.00/20 Reviews0/10 Clients & Experience7.2/10 Market PresenceService focus
23% Call Center Services15% Sales Outsourcing62% Other -
$1,000+< $25 / hr1,000 - 9,999San Jose, CA
Ability to deliver
6/40.00/20 Reviews0/10 Clients & Experience6/10 Market PresenceService focus
100% Call Center Services -
$100,000+< $25 / hr1,000 - 9,999London , England
Ability to deliver
6/40.00/20 Reviews0/10 Clients & Experience6/10 Market PresenceService focus
45% Call Center Services55% Other -
$1,000+$25 - $49 / hr10 - 49Harlow, England
Ability to deliver
5.6/40.00/20 Reviews0.7/10 Clients & Experience4.9/10 Market PresenceService focus
80% Call Center Services20% Other
Latest Call Centers Articles
See all articles![How to Build a Budget for Call Center Services [With Template] cover image](https://img.shgstatic.com/clutch-static-prod/image/resize/715x400/s3fs-public/article/ba3fb126c373d45b88403b0272fa9201.jpg)
How to Build a Budget for Call Center Services [With Template]
Call center costs can add up over time, so it’s important that companies establish a thorough budget plan before outsourcing.
