Callbox, Martal Group, CIENCE, TeleDirect, Leadium - these are among the top telemarketing companies sales teams rely on to generate qualified leads, increase conversion rates, and build consistent pipelines through targeted outreach and performance-driven communication strategies.
Best Telemarketing Firms
5 Companies-Rankings updated: September 05, 2026
DesignRush evaluates all telemarketing firms based on their expertise, success stories, and verified client reviews. Some listings may be paid.
US-Based Outbound SDR Agency. Boutique. Multi-Channel. Real Pipeline.
Leadium builds each engagement around channel-optimized lead research, identifying whether each prospect is best reached by phone, email, or LinkedIn before outreach begins. Thefirm provides outbound and inbound appointment setting, cold calling, data sourcing, and deliverability management...
Top Services:
Email Marketing
BPO
CRM Consulting
Business Consulting
Direct Marketing
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Location
Las Vegas, Nevada
Number of Employees
50 - 99
Average Hourly Rate
$50/hr
Minimal Budget
Under $1,000
Leadium Services
Email Marketing
BPO
CRM Consulting
Business Consulting
Direct Marketing
Customer Support
Market Research
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Square
Rackspace
Microsoft
LG
DirecTV
OSRAM
Time Logistics
Palo Alto Networks
Amada Senior Care
brightwheel
Data sourced from the agency's DesignRush profile
Leadium Reviews & Testimonials
Scott Proffitt
VP of Sales at Energy Assurance
5.0★
AI Marketing Review from Scott Proffitt
Our monthly leads have gone up by 3x with Leadium. This allows us to focus on production efficiencies.
Sam Jennings
Sales Manager at Best Bees Company
5.0★
Call Centers Review from Sam Jennings
Finding Leadium changed the way our team operates. They've been able to fill our pipeline with the people we want to talk to so we can focus on beekeeping.
Marcos Moura
Founder and COO at Amada Senior Care
5.0★
Call Centers Review from Marcos Moura
Leadium is able to speak to our prospects as if they're Amada themselves. They're filling our pipeline in a way we couldn't!
Reviews verified by DesignRush and sourced from the agency's profile
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24/7 Live Answering, Virtual Receptionist & Call Center Solutions
AnswerFirst helps businesses stay connected with real, helpful people answering every call day or night. No bots. No scripts. Just trained Customer Service Professionals who know how to support your customers when it matters most...
Top Services:
Phone Answering Services
Call Centers
Customer Support
Location
Tampa, Florida
Number of Employees
100 - 249
Minimal Budget
Under $1,000
AnswerFirst Communications Services
Phone Answering Services
Call Centers
Customer Support
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
AAMCO
ABM
AFC Urgent Care
AFLAC
Bauer Food, LLC (Operates McDonald's)
Berkshire Hathaway
Brookhaven National Lab
Coldwell Banker
Century 21
Cushman and Wakefield
Data sourced from the agency's DesignRush profile
AnswerFirst Communications Reviews & Testimonials
Johnson Legal PLLC
Review from Google
1.0★
Johnson Legal PLLC's Review Sourced from Google
As a small law office, we used AnswerFirst for about a year. We opted not to have calls recorded as their system has an irritating "beep" that sounds in the background while customers are on the phone. We thought things were going well. Several months later we signed up for CallRail, which recorded all incoming calls. We began to see a pattern of poorly handled calls. When we shared this information with management, and offered to provide the recording, they said "no thanks." The probems continued. For instance one caller asked if we did simple Wills. The AnswerFirst agent said, "No, we only do Estate Planning." After sharing these simple issues with management nothing changed. We asked if they could give us an adjustment to our bill based on the poorly handled responses. They said "No." We notified them this week we were switching carriers and they acted like they could care less. DO NOT use them as they cannot handle the simplest of calls.
Demetri Karoutsos
Review from Google
5.0★
Demetri Karoutsos's Review Sourced from Google
Outstanding After-Hours Answering Service – Highly Recommend for Service-Based Businesses
We've transitioned to AnswerFirst about four months ago for our after-hours answering service needs, and they’ve exceeded every expectation. Their live agent support, combined with responsive customer service and advanced technology integration, has provided our team with a seamless and professional solution that far surpasses our previous provider.
What sets AnswerFirst apart is their adaptability to our unique workflows, quick response times, and overall attention to detail. As a service business, having a reliable, U.S.-based call center is essential and AnswerFirst delivers with consistency and clarity.
Their platform gives us the functionality we need, and the quality of their after-hours call handling has significantly improved both our internal efficiency and our customer experience.
If you're a service-based company looking for high-quality live agents, professional support, and a partner who understands urgency and accountability, I highly recommend AnswerFirst. Exceptional value, exceptional team.
Demetri Karoutsos
Director, CareMaster
Scott Lady
Review from Google
5.0★
Scott Lady's Review Sourced from Google
Finally, and I mean FINALLY an inbound call center who does what they say they will do, and does it excellently.
Danielle and Robert have been incredible helping me with my campaigns, and ensuring everything is flowing smoothly.
I highly recommend giving them a shot for your call inbound call needs.
Reviews verified by DesignRush and sourced from the agency's profile
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Offering Contact & Call Center Services. Experience is everything. At NexRep, we know that creating exceptional experiences for our Marketplace Contractors inspires them to create exceptional customer experiences...
Top Services:
Call Centers
Phone Answering Services
BPO
Location
Portland, Maine
Number of Employees
250 - 499
Minimal Budget
Under $1,000
NexRep Services
Call Centers
Phone Answering Services
BPO
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
We are the fastest-growing BPO in India. Offers the best business opportunities in the industry. Deals in non-voice process, voice process, BPO solutions, banking process, digital marketing, and IT projects...
Top Services:
BPO
Business Consulting
HR Outsourcing
Customer Support
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Location
Noida, India
Number of Employees
Under 49
Average Hourly Rate
$50/hr
Minimal Budget
Under $1,000
Zoetic BPO Services Services
BPO
Business Consulting
HR Outsourcing
Customer Support
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Empowering Customer Experience with AI and Human Expertise-Customized Care Solutions by D3Mynds.
Empowering Customer Experience with AI and Human Expertise-Customized Care Solutions by D3Mynds. Where AI Meets Human Touch D3Mynds Delivers Customized Customer Care Solutions for a New Era...
Top Services:
BPO
Business Consulting
Call Centers
Phone Answering Services
Customer Support
Show more
Location
Delhi, India
Number of Employees
Under 49
Average Hourly Rate
$10/hr
Minimal Budget
Under $1,000
D3Mynds Services
BPO
Business Consulting
Call Centers
Phone Answering Services
Customer Support
Transcription Services
HR Outsourcing
Market Research
Accounting
Translation Services
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
5 Frequently Asked Questions About Telemarketing Firms
What do telemarketing companies do?
Telemarketing agencies use phone-based direct marketing to sell products, generate leads, or book appointments on behalf of businesses, performing both outbound and inbound calls to grow sales pipelines and client relationships.
As all telemarketing interactions involve direct human contact, the approach allows them to influence potential customers’ opinions, purchasing habits, or perceptions toward a brand.
What services do telemarketing firms provide?
Telemarketing services for businesses can be split into two main categories: inbound and outbound.
Inbound telemarketing services cover customer support calls, namely technical support, order taking, billing inquiries, upselling, and virtual receptionist service, to name a few. They can support both B2B and B2C companies.
Outbound telemarketing services, also referred to as proactive outreach, are intended to boost businesses’ bottom line. This category comprises several different service types, including lead qualification, appointment setting, cold calling, customer reactivation, and more.
B2B telemarketing companies are often hired to assist non-profit organizations in soliciting donations or to collect debt and follow up on overdue accounts on behalf of other businesses.
How much do telemarketing agencies charge for their services?
Telemarketing agencies charge between $7 and $75 per hour for their services. The service cost can also vary based on location (offshore vs. onshore), campaign complexity, duration, and agent experience, with B2B telemarketing campaigns often costing more than B2C.
Other common pricing models include:
Per-lead: $35 to $60 per qualified lead
Flat-rate: $650+ for a 4-week campaign
Commission-based: 5% to 20% of each closed sale
How long do telemarketing campaigns take?
Telemarketing campaigns usually take a few months, as lead nurturing takes multiple phone calls for telemarketers to engage with a prospect and close a sale.
Although initial lead generation begins within the first few weeks, for a full, effective cycle, the campaigns are run between 3 and 6 months. The average campaign takes about 14 weeks to reach an optimum level of opportunities per day. The length also depends on the campaign type:
Pilot and trial campaigns: Usually run for 10 to 12 weeks to test the market, refine the pitch, and validate traction.
Short campaigns: 4 to 6 weeks for time-sensitive promotions or event registrations.
Long-term campaigns: 6 months to over a year for slow B2B sales cycles that require more lead nurturing.
What kind of ROI can businesses expect from telemarketing campaigns?
Lucrative telemarketing campaigns often result in a 5:1 to 10:1 return on investment (ROI), meaning $5 to $10 in revenue for every $1 spent. The return rate depends on the quality of the call lists, the persuasion skill of the callers, the product, the offer, and whether it's part of a multi-channel strategy. Notably, ROI grows over time through stronger customer retention and better targeting informed by feedback from calls.
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