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
3 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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A global Digital Marketing Agency helping brands streamline and scale their business with bespoke SEO, Social Media Marketing, PPC, Email Marketing, Content Marketing, Database generation, Lead Generation, Branding, and Website development solutions.
We help you grow your business online...
Top Services:
SEO
Digital Marketing
WordPress Website Design
Digital Services
Social Media Marketing
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Location
Pune, India
Number of Employees
Under 49
Average Hourly Rate
$15/hr
Minimal Budget
Under $1,000
Espial Solutions Services
SEO
Digital Marketing
WordPress Website Design
Digital Services
Social Media Marketing
Content Marketing
Email Marketing
PPC
Customer Support
eCommerce
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
TelerainMD
Boomerang Transportation
Bow and Baan Technology Services Pvt. Ltd.
Data sourced from the agency's DesignRush profile
Espial Solutions Reviews & Testimonials
Ahmed Iqbal Khan
Senior O&M Engineer at Amin Renewable Energy Company SAOC at Amin Renewable Energy Company SAOC
5.0★
PPC Review from Ahmed Iqbal Khan
Espial worked for us to deliver quality leads through PPC campaigns. Our challenge was that we hardly had 1% conversion from all the clicks that we were getting through Google Adwords. Within a month our lead to conversion increased from 1% to 5%, that was a remarkable achievement. They know which design and content works best. The level of communication and responsiveness that we receive from them makes them incredibly easy to work with.
Saurabh Agarwal
IT Manager at TelerainMD Inc
5.0★
SEO Review from Saurabh Agarwal
We are very satisfied with the services received so far in these 7 months. Because of Espial Solution's efforts, the site's traffic boosted and most keywords used got high-rankings on Google search. As a result, the client receives more organic conversions and customer satisfaction. The team is very professional and punctual.
Rajeev Mehta
President at Medical Transportation Company
5.0★
Digital Marketing Review from Rajeev Mehta
Working with them is quite fluid, they are available 24 hours of the day. Thanks to the work of Espial Solutions, website traffic increased and sales grew by almost 50%. The workflow is fluid, as the team is available all day. The client is impressed with the analytical way that Espial Solutions did their work, studying the business model first before starting.
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
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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