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
2 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.
Founded in 2002, Antasis is a trusted Singapore-based provider of outsourced business solutions. We deliver world-class customer service, IT support, and back-office operations through a flexible, innovative workforce. Certified in ISO 27001, ISO 9001, Bizsafe Level 3, COPC, and Six Sigma, we ensure quality...
Top Services:
BPO
Call Centers
Location
Singapore, Singapore
Number of Employees
250 - 499
Average Hourly Rate
$15/hr
Minimal Budget
$1,000 - $10,000
Antasis Pte Ltd Services
BPO
Call Centers
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Getgo
Canadian Pizza
Healthy School Supply
Data sourced from the agency's DesignRush profile
Antasis Pte Ltd Reviews & Testimonials
nontombi mooi
Review from Google
5.0★
nontombi mooi's Review Sourced from Google
wanted to confirm I received and email and i went through the interview process with someone who claims to be working and recruiting for your company. I want to confirm if it is legit they are recruiting from South Africa to work and be based in Cambodia.
Daryl Deanna
Review from Google
5.0★
Daryl Deanna's Review Sourced from Google
Receive a text from someone claiming from this company other branch, in Bukit Indah, JB. Can you guys clarified this?
Andrew Chng
Review from Google
5.0★
Andrew Chng's Review Sourced from Google
I just wanted to let you know that it's been great working with Antasis. Thank you so much for meeting our needs and a partner that is easy to work with.
Reviews verified by DesignRush and sourced from the agency's profile
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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.
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