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.
Organic rankings are determined by five factors: top services, reviews, portfolio, awards/press, and team expertise. Sponsored listings pay for a placement that appears above organic positions. Sponsorship does not affect star ratings or review content - read more on our methodology page.

Vserve Ebusiness Solutions
VerifiedVerified by the DesignRush team for authenticity and credibility.All-In-One E-commerce Technology Solution Provider: Because Every Click Matters.
Vserve Ebusiness Solutions is an AI-powered Supply Chain Management and Ecommerce company with 10+ years of global delivery. We provide offshore teams, BPO, procurement, order and inventory management, customer support, and ecommerce solutions to reduce costs and improve efficiency...
Top Services:
- Logistics
- Accounting
- eCommerce Development
- BPO
- Call Centers
- Show more
- Location
- New York City, New York
- Number of Employees
- 500 - 999
- Average Hourly Rate
- $25/hr
- Minimal Budget
- Under $1,000
- Portfolios Count
- 1 Project Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsVserve Ebusiness Solutions Services
Data sourced from the agency's DesignRush profileTraci Miller Marcia Maples Joseph Powell
Vserve Ebusiness Solutions Reviews & Testimonials
Customer Support Review from Marie M. Harris
Although we have been struggling before, after expanding our influence into mountain wear and watches, it became evident that we needed some professional help. We were offering many new products, and making matters worse, we were present in different foreign markets, which mean many competitors to keep an eye on. After some consultations with the Vserve team, we had no doubts that they were the solution we had been looking for. Thanks to their proven MAP enforcement strategies, maintaining our market position is now easier. We always have accurate pricing information at our fingerprints. I must say, we are really impressed with Vserve.
Customer Support Review from Danielle W
Our company is grateful to have found a collaborative team in Vserve for our Product Information Management. Initially, we were unsure about the quality of product descriptions and their accessibility to our buyers. However, Vserve’s expertise in programming language and business best practices helped us to manage our complete product information and catalog pretty well. The conversion rate excelled our expectations, and our products shot up on Google rankings!
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsUS-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
- Show more
- Location
- Las Vegas, Nevada
- Number of Employees
- 50 - 99
- Average Hourly Rate
- $50/hr
- Minimal Budget
- Under $1,000
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsLeadium Services
Data sourced from the agency's DesignRush profileSquare Rackspace Microsoft LG DirecTV OSRAM Time Logistics Palo Alto Networks Amada Senior Care brightwheel
Leadium Reviews & Testimonials

AI Marketing Review from Scott Proffitt
Our monthly leads have gone up by 3x with Leadium. This allows us to focus on production efficiencies.

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.

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 View All ReviewsSales Enablement Partner.
Denave is a B2B sales enablement organization based in Malaysia that offers a complete range of demand generation and lead generation solutions. Denave offers services including Business process outsourcing, digital marketing and B2B data services...
Top Services:
- Digital Marketing
- Event Marketing
- Call Centers
- Customer Support
- Email Marketing
- Show more
- Location
- Kuala Lumpur, Malaysia
- Number of Employees
- 1000 & Up
- Average Hourly Rate
- $50/hr
- Minimal Budget
- Under $1,000
- Portfolios Count
- 1 Project Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsDenave Services
Data sourced from the agency's DesignRush profileLenovo Saint Gobain Marg
Denave Reviews & Testimonials
Rutteren Morgan's Review Sourced from Google
I recently attended an interview with Denave for a Talent Acquisition role, and it was a disappointing experience. The interviewer Shalini (Global HR) demonstrated a lack of professionalism throughout the session.I felt I was not given a fair chance to express myself, as the interviewer appeared more interested in steering the conversation to her preferences. Additionally, I was surprised by her comments about my career transitions, especially since her profile suggests similar patterns.The session was further marred by poor etiquette, such as answering phone calls during the interview. As someone with extensive experience in recruitment, I expected a higher standard of professionalism from a company like Denave. This experience has raised concerns about their commitment to a candidate-focused hiring process.
Vy Ro Cam's Review Sourced from Google
It's has been 8 months now since I joined the company, such a great team ever. Co-workers are friendly, Team leaders are very supportive and thoughtful. HR team, IT team always response immediately when ever have an issue. :)
NGUYEN TRAM's Review Sourced from Google
October 2021 will mark my 6th anniversary of my employment at Denave.Something that I have experienced in Denave is the encouragement for growths.I have moved up over 6 years in Denave. When I joined Denave I didn’t see myself as a manager, and now I manage multiple people. And I was only able to do that through the support from my team and the encouragement of my managers .It has been a great journey to me and I am proud to be a part of Denave family.
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsUltimate Technology Partner.
MetaFussion is a dynamic digital company driven by a passion for crafting innovative software solutions tailored to meet the evolving needs of businesses. Our comprehensive services, including SEO, SMM, web development, and PPC campaigns, empower clients to thrive in today's fast-paced digital environment...
Top Services:
- Digital Services
- Web Development
- Digital Marketing
- Mobile App Development
- Business Consulting
- Show more
- Location
- Brampton, Canada
- Number of Employees
- 50 - 99
- Average Hourly Rate
- $10/hr
- Minimal Budget
- Under $1,000
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsMetaFussion Services
Data sourced from the agency's DesignRush profileAdam Master Movers Atlantic Moving Mk Furniture Gm Abatements
MetaFussion Reviews & Testimonials
Jemnii Wrost's Review Sourced from Google
Metafussion will assit you in growing your online business.They offer guidance and strategy while I focus on running my day-to-day operations.Highly recommended!
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsEngineering products. Engineering demand.
Talent Axis Solutions is a Noida-based team helping brands grow through smart technology and result-driven marketing. From building modern web and mobile applications to running Salesforce implementations and hyperlocal ad campaigns, we focus on outcomes clients can actually measure more leads, more footfall...
Top Services:
- Digital Services
- Web Development
- eCommerce Development
- Digital Marketing
- SEO
- Show more
- Location
- Noida, India
- Number of Employees
- Under 49
- Average Hourly Rate
- $20/hr
- Minimal Budget
- Under $1,000
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsTalent Axis Solutions Services
Data sourced from the agency's DesignRush profileHind Collection Retail Shop Oxford Public School Aditya Spare Parts Wholesale
Your go to Web & Outsourcing Partner
BEXMS is a Pakistan based web development and outsourcing company helping businesses build, grow, and manage their digital operations. We create fast, custom websites and web applications, manage social media, and provide trained outsourced staff for office operations and customer support. Our teams work with...
Top Services:
- BPO
- Web Development
- Customer Support
- Web Design
- UI/UX Design
- Show more
- Location
- Lahore, Pakistan
- Number of Employees
- 50 - 99
- Average Hourly Rate
- $5/hr
- Minimal Budget
- Under $1,000
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsBexms Services
Data sourced from the agency's DesignRush profileNomshah File-editor Hi Aims Medical Averqis IRK Consultants
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
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsD3Mynds Services
Data sourced from the agency's DesignRush profileSoftware & IT Services Industry Corporate Services Industry Entertainment Industry
Innovation and Intregration Everyday
BizzBuzz Creations is a result-driven Digital Marketing & BPO agency offering SEO, SMO, SMM, Google Ads, Meta Ads, Website Design & Development, Branding, Content Strategy, and Complete BPO Services. We help businesses grow with tailored strategies, data-driven solutions, and a strong focus on performance and...
Top Services:
- Digital Services
- Graphic Design
- Web Design
- Web Development
- Social Media Marketing
- Show more
- Location
- Prayagraj, India
- Number of Employees
- Under 49
- Average Hourly Rate
- $10/hr
- Minimal Budget
- Under $1,000
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsBizzBuzz Creations Services
Data sourced from the agency's DesignRush profileMr. Tariq Mr.Shubhash Tahir Abbas
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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.







