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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 is perceived as offering good value for cost, with clients noting effectiveness in lead generation and appointment setting. Specific investments vary, with some clients spending between $12,000 and $80,000 annually, depending on project scope and engagement length.

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

  • Challenges with Non-English Markets

    Some clients noted challenges in non-English speaking markets, suggesting improvements in language capabilities could enhance effectiveness in regions like China and Vietnam, where local language proficiency is crucial.

  • Project Management and Communication

    Callbox's project management skills are frequently commended. Clients value their structured processes, regular updates, and the ability to maintain clear communication channels, ensuring project alignment and timely delivery.

  • Effective Lead Generation Services

    Callbox consistently delivers high-quality leads that meet client expectations. Many clients have reported increased lead volume and improved conversion rates, indicating effective lead generation strategies tailored to diverse industries.

  • Industry-Specific Expertise

    Callbox is noted for its ability to understand and adapt to various industries, providing tailored solutions that align with specific business objectives. This expertise helps them deliver relevant and impactful results.

  • Positive Client Relationships

    Callbox maintains strong client relationships through regular communication, responsiveness, and a commitment to client success. This fosters trust and long-term partnerships with their clients.

  • Responsive and Professional Team

    Callbox is praised for its responsive and professional team. Clients often highlight their prompt communication, adaptability to feedback, and commitment to achieving project goals, resulting in smooth collaborations.

Callbox Reviews

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Services
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Call Center Services for IT Services Firm

  • Call Center Services
  • $10,000 to $49,999
  • Sep. 2020 - May 2021
4.5
Quality
4.5
Schedule
5.0
Cost
4.5
Willing to Refer
4.0

"They were very professional and friendly."

Jul 20, 2021
Sales Manager, AdvantageNZ
Andrew Ramson
Verified
  • Other industries
  • New Zealand
  • 11-50 Employees
  • Online Review
  • Verified

An IT services company was looking to generate more leads for their sales team. They hired Callbox to handle calls and schedule appointments with prospective customers.

Lead Gen for Workplace Safety & Health Organization

  • Other Digital Marketing
  • $10,000 to $49,999
  • Feb. 2021 - Ongoing
4.5
Quality
5.0
Schedule
5.0
Cost
4.0
Willing to Refer
4.5

"Callbox has a clear idea of the process and has guided us well."

Jul 7, 2021
Marketing Manager, WSH Council
Chia Yi Lun
Verified
  • Government
  • Singapore
  • 201-500 Employees
  • Online Review
  • Verified

As part of their efforts to promote their mission, a Workplace Safety and Health (WSH) organization has hired Callbox to gather an audience for one of their programs. The vendor focuses on gathering leads.

Call Center Services for Consulting Firm

  • Call Center Services
  • $10,000 to $49,999
  • Dec. 2020 - Apr. 2021
4.0
Quality
4.0
Schedule
4.0
Cost
3.5
Willing to Refer
4.0

"Callbox is a good partner to engage for lead generation activities."

Jun 25, 2021
Business Development Executive, Consulting Firm
Anonymous
Verified
  • Other industries
  • Singapore
  • 51-200 Employees
  • Online Review
  • Verified

Callbox was hired by a consulting firm to generate leads for their sales team. The team provided conversational scripts for multiple channels and handled the client's lead generation campaign.

Go-To-Market Strat (GTM) & Campaign for Cybersecurity Firm

  • Advertising
  • $10,000 to $49,999
  • Feb. - June 2021
4.5
Quality
4.5
Schedule
4.0
Cost
5.0
Willing to Refer
4.5

"We appreciated their response speed."

Jun 1, 2021
CMO, Cybersecurity Firm
Rishika Mehrotra
Verified
  • Other industries
  • India
  • 51-200 Employees
  • Online Review
  • Verified

Market Research for Color Technology Firm

  • Market Research
  • Less than $10,000
  • Mar. 2021 - Ongoing
4.0
Quality
4.0
Schedule
4.0
Cost
4.0
Willing to Refer
4.5

"They ramp up productivity as they get more familiar and comfortable with the audience."

May 19, 2021
Marketing Analytics & Visibility Head, Color Technology Firm
Olivier Tulliez
Verified
  • Manufacturing
  • Grand Rapids, Michigan
  • 51-200 Employees
  • Online Review
  • Verified

Callbox provides market research consultations for a color technology firm. Their service discusses the qualifying questions needed to reach the client's target audience, ultimately increasing their relevance.

Call Center Services for Industrial Printer Manufacturer

  • Call Center Services
  • $10,000 to $49,999
  • Oct. 2020 - Ongoing
4.0
Quality
4.0
Schedule
3.0
Cost
5.0
Willing to Refer
3.5

"Feedback was good and consistent."

May 13, 2021
North America Marketing Analyst, Videojet, Inc.
Anonymous
Verified
  • Manufacturing
  • Wood Dale, Illinois
  • 201-500 Employees
  • Online Review
  • Verified

Callbox provides ongoing call center services for an industrial printer manufacturer. The team handles accounts requalification. They also record all the data found and send it to the client once weekly.

Call Center Services for Cybersecurity Company

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

"They are always willing to test new processes and strategies and are great at collaboration."

May 10, 2021
VP Sales, Cybersecurity Company
Josh Tenby
Verified
  • Other industries
  • Tel Aviv, Israel
  • 201-500 Employees
  • Online Review
  • Verified

To increase brand awareness, a cybersecurity company hired Callbox to provide outbound marketing services. The team is in charge of handling email and LI campaigns and scheduling calls with prospects.

Call Center Services for Clinical Solutions Company

  • Call Center Services
  • $10,000 to $49,999
  • May 2021 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"They are very fast and persistent in calling all our prospects despite this challenging time."

May 5, 2021
Business Development Specialist, Clinical Solutions Company
Anonymous
  • Other industries
  • Boston, Massachusetts
  • 10,001+ Employees
  • Online Review

Callbox provides telemarketing services for a clinical solutions company. The team is handling customer profiling and outbound marketing services for the client.

Outbound Sales & Marketing for SaaS Based Company

  • Call Center Services
  • $10,000 to $49,999
  • July 2020 - Ongoing
4.5
Quality
4.0
Schedule
4.0
Cost
5.0
Willing to Refer
5.0

"The most impressive attribute of Callbox was their understanding of our business and the prospects we were targeting."

Apr 6, 2021
Technical Sales Engineer, Allotrac
Matt Edgar
Verified
  • Other industries
  • Wollongong, Australia
  • 11-50 Employees
  • Online Review
  • Verified

An innovative software solutions company partnered with Callbox to provide an outbound sales and marketing team which specializes in account-based marketing and multi-channel marketing services.

Outbound Marketing for Material Handling Company

  • Advertising
  • $10,000 to $49,999
  • Oct. 2020 - Jan. 2021
4.5
Quality
4.0
Schedule
4.5
Cost
4.0
Willing to Refer
4.5

"We were very pleased with the vast improvements in metrics."

Mar 29, 2021
Marketing Analyst for SEA Region, Equipment Company
Jacqueline Tan
Verified
  • Manufacturing
  • Singapore
  • 51-200 Employees
  • Online Review
  • Verified

Callbox was hired to create outbound marketing campaigns for an equipment company. The team was in charge of growing the client's database by acquiring new contacts and generating more leads from those.

Premier Verified means Clutch independently confirmed Callbox is a legally registered business,
financially sound (Creditsafe: Low Risk), and backed by 116 verified client reviews averaging 4.6 stars.

Learn More
Verified Client Reviews
116
Overall Review Rating
4.6
Source
Clutch
Last Updated
August 22, 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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