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.

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  • Your AI & Digital Transformation Partner

    At Bitwords, we drive growth by leveraging AI and advanced digital transformation across the contech, fintech, and e-commerce industries. We specialize in creating seamless, tech-forward experiences that connect brands with their customers, optimize complex ecosystems, and maximize market opportunities...

    Top Services:

    • Design Services
    • Digital Strategy
    • eCommerce Development
    • Web Development
    • AI Development
    • Show more
    Location
    New York City, New York
    Number of Employees
    50 - 99
    Average Hourly Rate
    $100/hr
    Minimal Budget
    $10,000 - $25,000
    Portfolios Count
    3 Projects Listed
  • Dominate Your Rankings. Conquer Your Digital Battlefield.

    Gladiators Ranking is a Business Growth & Technology Agency helping service-based businesses generate more visibility, leads, conversations, and customers through SEO, Google Business Profile optimization, web development, PPC, social media, AI automation, AI search optimization, and receptionist solutions...

    Top Services:

    • Digital Marketing
    • Web Development
    • SEO
    • PPC
    • AEO
    • Show more
    Location
    Denver, Colorado
    Number of Employees
    Under 49
    Portfolios Count
    1 Project Listed
  • We Focus On Customer Service So You Can Focus On Your Business.

    Five Star Solutions is a premier, mid-sized contact center outsourcer dedicated to delivering world-class customer care. By blending boutique-level agility with enterprise-grade capabilities, the company serves as a seamless extension of its clients' brands...

    Top Services:

    • Business Consulting
    • Call Centers
    • BPO
    • Phone Answering Services
    • Show more
    Location
    Sioux Falls, South Dakota
    Number of Employees
    1000 & Up
    Average Hourly Rate
    $25/hr
    Minimal Budget
    $50,000 & Up
  • Elevating Business Efficiency. Driving Success.

    SkyTech Global is a Bangladesh-based global delivery, business process, and technology company powering scalable operations worldwide.Formerly SkyTech Solutions...

    Top Services:

    • BPO
    • Customer Support
    • Call Centers
    Location
    Dhaka, Bangladesh
    Number of Employees
    500 - 999
    Average Hourly Rate
    $25/hr
    Minimal Budget
    $1,000 - $10,000
  • Nearshore call center and VA teams, live in about 7 days

    Call Force Global builds dedicated nearshore call center and virtual assistant teams from Jamaica, Trinidad, Saint Lucia, Belize, and Colombia for North American businesses. Teams go live in about 7 days at 12 to 18 USD per hour all-in, on month-to-month terms with no long contracts. Every call is scored by...

    Top Services:

    • Call Centers
    • BPO
    • Phone Answering Services
    • Customer Support
    • Show more
    Location
    Toronto, Canada
    Number of Employees
    Under 49
    Average Hourly Rate
    $15/hr
  • Calls answered. Insight delivered.

    Customer Direct answers your calls and gives you answers about your business. What makes us unique: we analyze every single interaction, not just a small sample like most call centers...

    Top Services:

    • Call Centers
    • BPO
    • Phone Answering Services
    • Customer Support
    • AI Development
    • Show more
    Location
    Maryland Heights, Missouri
    Number of Employees
    250 - 499
    Minimal Budget
    Under $1,000
  • UK Operations Partner

    AtDesk is a UK-focused operations partner helping service businesses manage calls, customer support, dispatch, CRM and administrative workflows with clear reporting and accountable human support...

    Top Services:

    • Phone Answering Services
    • Customer Support
    • BPO
    • Call Centers
    • Business Consulting
    • Show more
    Location
    Blackburn, United Kingdom
    Number of Employees
    50 - 99
    Average Hourly Rate
    $15/hr
    Minimal Budget
    Under $1,000
  • Conversation Intelligence for Modern Enterprises

    Make every call a useful conversation with Oli AI, an enterprise AI voice agent for inbound and outbound calls. From welcoming callers and booking appointments to qualifying leads and managing customer follow-ups, Oli AI adapts to your workflows across 22+ global languages. It connects with your business...

    Top Services:

    • Call Centers
    • BPO
    • Phone Answering Services
    • Customer Support
    • Show more
    Location
    Chennai, India
    Number of Employees
    Under 49
    Average Hourly Rate
    $1/hr
  • Build. Deploy. Manage. Scale.

    Ruminative is a BPO and Operations Management company helping businesses build, manage, and scale dedicated teams across customer support, sales, backend operations, field activities, and verification services. With an in-house operational setup and multi-region capabilities, we provide flexible outsourcing...

    Top Services:

    • BPO
    • Logistics
    • Phone Answering Services
    • Customer Support
    • Call Centers
    • Show more
    Location
    Gurgaon, India
    Number of Employees
    50 - 99
    Average Hourly Rate
    $11/hr

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Every agency is independently vetted before it can be listed or ranked

1

Identity Check

We verify businesses and reviewer LinkedIn profiles for integrity.

Agencies vetted
129,003+
2

Portfolio Review

We review agency work, case studies, and results to confirm skill.

Applicants rejected
47%
3

Ongoing Audit

We monitor listings regularly; outdated agencies are removed.

Agencies verified
9

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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.