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Top B2B Lead Generation Experts Worldwide

Since 2004, Callbox has been the trusted leader and top lead generation company, driving high-velocity growth for businesses worldwide. As the largest and most experienced player in B2B sales development, we offer comprehensive solutions from AI-powered prospecting to appointment setting designed to fuel your revenue pipeline.

  • Min project size
    Undisclosed
  • Hourly rate
    Undisclosed
  • Employees
    1,000 - 9,999
  • Locations
    Los Angeles, CA
  • Year founded
    Founded 2004
  • Languages

6 Languages that we service

  • Mandarin
  • English
  • Spanish
  • Portuguese
  • Vietnamese
  • Cantonese

2 Locations

  • Los Angeles , CA
  • Singapore , Singapore

Select Focus Area
Back Office Outsourcing
Customer Service Outsourcing
Outbound Services
Industries
Information technology
20%
Telecommunications
15%
Advertising & marketing
10%
Business services
10%
Financial services
10%
Medical
10%
Education
5%
Hospitality & leisure
5%
Manufacturing
5%
Other industries
5%
Retail
5%
Clients
Enterprise (>$1B)
45%
Midmarket ($10M - $1B)
40%
Small Business (<$10M)
15%
Certified in:
Sales Outsourcing Call Center Services B2B Lead Generation B2B Appointment Setting

Pricing Snapshot

Min. project size Undisclosed
Avg. hourly rate Undisclosed
Rating for cost 4.3 /5

What Clients Have Said

Callbox offers competitive pricing with positive value for cost, as noted by clients. Projects typically range from $12,000 to $80,000 annually, providing significant lead generation and appointment setting results, with clients reporting improved sales pipelines and high-quality leads.

This summary is based on verified Clutch reviews.

Most Common Project Size

$10,000 - $49,999 based on 101 reviews
< $10,000 $10,000 - $49,999 $50,000 - $199,999 > $200,000

Select a service to see pricing information

Callbox Review Insights

Overall Review Rating

4.6
  • Quality 4.5
  • Schedule 4.7
  • Cost 4.3
  • Willing to Refer 4.6

Top Mentions

Review Highlights

  • High Client Satisfaction and Long-term Partnerships

    Many clients express high satisfaction with Callbox's services, leading to long-term partnerships. The company's ability to consistently deliver results and adapt to changing needs fosters client loyalty and repeated contract renewals.

  • Successful Adaptation to Client Processes

    Callbox is praised for their ability to integrate with client processes, adapting to internal workflows and systems like CRM platforms, which enhances the efficiency and effectiveness of their lead generation efforts.

  • Strong Project Management and Communication

    Callbox is praised for excellent project management, maintaining clear communication with clients through regular meetings and updates. They are responsive, professional, and able to adapt strategies based on client feedback, ensuring smooth collaboration and project success.

  • Professional and Knowledgeable Team

    Clients commend Callbox for its professional and knowledgeable team, capable of understanding complex business models and industries. Their expertise helps in crafting effective messaging and outreach strategies that resonate with target audiences.

  • Room for Improvement in Non-English Markets

    Some clients noted that Callbox could enhance their services by including multilingual support to better cater to non-English speaking markets, which would expand their reach and effectiveness in diverse regions.

  • Adaptability and Customization

    Callbox is noted for its flexibility and ability to tailor services to fit client needs. They are open to feedback and make necessary adjustments to improve outcomes, which clients find valuable in achieving their marketing and sales goals.

Callbox Reviews

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Services
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Call Services & Lead Generation for Software Firm

  • Call Center Services Market Research
  • Third party verification
  • $10,000 to $49,999
  • Oct. 2020 - Ongoing
4.0
Quality
4.5
Schedule
5.0
Cost
4.0
Willing to Refer
5.0

“The team offers a different perspective on how you think to improve your sales.”

Feb 12, 2021
Account Manager, Bentley Systems
Leah Kegle
Verified
  • Other industries
  • Exton, Pennsylvania
  • 1,001-5,000 Employees
  • Phone Interview
  • Verified

Callbox provides lead generation services for a tech firm. To drive more sales prospects for a construction solution, they call suitable contacts and pass their notes to an internal member to close the deal. 

Social Media, & Email Marketing & Lead Gen for Telecoms Co

  • Advertising Other Digital Marketing
  • Other advertising
  • $50,000 to $199,999
  • Mar. 2019 - Ongoing
4.0
Quality
4.5
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"Flexibility and proactivity are two of their strengths and key to their competitive advantage."

Feb 12, 2021
Marketing Operations Lead, Telecommunications Company
Paulo Lopez
Verified
  • Telecommunications
  • Miami, Florida
  • 10,001+ Employees
  • Phone Interview
  • Verified

A telecommunications company engaged Callbox to augment lead generation initiatives. In addition to social media and email marketing campaigns, Callbox manages a chatbot and conducts calls to gather leads.

Appointment Scheduling for Managed IT Services Provider

  • Call Center Services
  • $10,000 to $49,999
  • Nov. 2020 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"They are responsive and act as though they are an extended part of our company."

 
Feb 12, 2021
Director of Business Development, Excensure
Steve Moisoff
Verified
  • Other industries
  • New York City, New York
  • 1-10 Employees
  • Online Review
  • Verified

Callbox is the partner of a managed IT services provider in scheduling appointments with prospective clients. The goal of the project is to schedule up to 20 appointments monthly and close a percentage of them.

Telemarketing & Lead Generation for Medical Imaging Company

  • Call Center Services
  • B2C Telemarketing & telesales
  • $50,000 to $199,999
  • July 2020 - Ongoing
4.5
Quality
4.5
Schedule
4.0
Cost
5.0
Willing to Refer
5.0

“We’ve definitely gained business tied to work that Callbox does.”

Feb 11, 2021
Director of Marketing, Precision Image Analysis
Anonymous
Verified
  • Other industries
  • Seattle, Washington
  • 11-50 Employees
  • Phone Interview
  • Verified

Callbox provides telemarketing services for a hospital image post-processing company. They use a script, conduct email outreach, and use a multi-touch approach to secure qualified leads.

Lead Generation for IT Cloud Services Company

  • Advertising
  • $50,000 to $199,999
  • June 2020 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"Their structure, systems, and methods are all very impressive."

Feb 9, 2021
VP Sales, Backup Technology
Mike Colesante
  • Other industries
  • Houston, Texas
  • 11-50 Employees
  • Online Review

An IT cloud services company hired Callbox in order to help them generate leads and revenue. The team is responsible for taking a multimedia approach to lead generation and appointment setting.

Lead Generation Campaign for IT Outsourcing Company

  • Advertising
  • $10,000 to $49,999
  • Jan. 2021 - Ongoing
5.0
Quality
5.0
Schedule
4.5
Cost
4.5
Willing to Refer
5.0

"We have a total team approach from both parties which has made this a pleasant and successful campaign to date."

Feb 9, 2021
Director of Sales, IT Outsourcing Firm
Jim Lumpkin
Verified
  • Other industries
  • Atlanta, Georgia
  • 11-50 Employees
  • Online Review
  • Verified

An IT outsourcing company needed to establish brand recognition and develop leads. They partnered with Callbox to develop marketing campaigns that will generate qualified leads.

Appointments & Leads for Technology Company

  • Call Center Services
  • $10,000 to $49,999
  • July 2020 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"Callbox has gotten us over 80 solid leads and/or appointments, which our inside teams are now working."

Feb 9, 2021
Sales & Marketing Liaison, Technology Company
Kira Stone
Verified
  • Other industries
  • Washington, District of Columbia
  • 51-200 Employees
  • Online Review
  • Verified

A technology company partnered with Callbox in order to take the lead on their appointment setting and lead gathering efforts to help their business development and sales teams.

Outreach Optimization for Marketing & Tech Company

  • Digital Strategy
  • $10,000 to $49,999
  • Dec. 2020 - Ongoing
4.5
Quality
4.5
Schedule
5.0
Cost
4.5
Willing to Refer
5.0

"We create the best workflow possible and we're still trying to improve it."

Feb 8, 2021
Senior Vice President, Atypical Digital
Anonymous
Verified
  • Advertising & marketing
  • New York City, New York
  • 201-500 Employees
  • Online Review
  • Verified

Callbox was hired by a marketing and technology company to help optimize their outreach program. The team serves as an extension for the client's business development process.

Outbound Campaign for Inheritance Funding Company

  • Call Center Services
  • Confidential
  • Dec. 2019 - Dec. 2020
4.5
Quality
5.0
Schedule
4.0
Cost
4.5
Willing to Refer
5.0

"Their responsiveness was impressive."

Feb 8, 2021
VP of Business Development, Inheritance Funding Company
Anonymous
Verified
  • Financial services
  • West Palm Beach, Florida
  • 11-50 Employees
  • Online Review
  • Verified

An inheritance funding company wanted to do an educational campaign across the country to inform their target audience regarding their services. They partnered with Callbox to provide the necessary services.

Introductory Phone Calls for Insurance Resource Firm

  • Call Center Services
  • $10,000 to $49,999
  • June 2020 - Jan. 2021
5.0
Quality
5.0
Schedule
5.0
Cost
4.5
Willing to Refer
5.0

"Callbox did a great job of discovering who we were and who we needed to connect with."

Feb 8, 2021
Director of Operations, AdvisorServe
Turner Lee
Verified
  • Financial services
  • Woodstock, Georgia
  • 1-10 Employees
  • Online Review
  • Verified

To help an insurance resources firm connect with more prospective clients, Callbox reached out to fee-only financial advisors. They helped set introductory calls via phone, email, and LinkedIn marketing. 

Premier Verified means Clutch independently confirmed Callbox is a legally registered business,
financially sound (Creditsafe: Low Risk), and backed by 119 verified client reviews averaging 4.6 stars.

Learn More
Verified Client Reviews
119
Overall Review Rating
4.6
Source
Clutch
Last Updated
August 26, 2026

Business Entity

Business Entity Name Callbox, Inc.
Source Delaware Secretary of State
Jurisdiction of Formation Delaware
Date of Formation January 13, 2012
Status Active
Last Updated November 16, 2020
ID 5095306

Credit Report Results

International Credit Risk Assessment Low Risk
Source Creditsafe
Last Updated February 2, 2021
Learn More About The Clutch Verification Process

Locations (2)

4924 Balboa Blvd # 353 Los AngelesCA, United States 91316

2 - 5

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