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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 good value for cost, frequently delivering high-quality leads and appointments. Clients appreciate the flexibility and responsiveness of their team, although some mention a desire for more personalized services and improved reporting. Overall, they are seen as a reliable partner for lead generation.

This summary is based on verified Clutch reviews.

Most Common Project Size

$10,000 - $49,999 based on 100 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 4.6
  • Cost 4.3
  • Willing to Refer 4.6

Top Mentions

Review Highlights

  • Efficient Workflow and Coordination

    The workflow between Callbox and its clients is often described as efficient and well-coordinated, with teams working seamlessly together to achieve project goals.

  • Successful in Increasing Brand Awareness

    Callbox has successfully helped clients increase brand awareness through targeted outreach and marketing campaigns, contributing to a stronger presence in their respective markets.

  • Effective Lead Generation Capabilities

    Callbox has been praised across multiple reviews for its ability to generate qualified leads, often exceeding client expectations in terms of lead volume and quality. Clients in various industries, such as healthcare, IT, and finance, have reported increased sales pipelines and improved conversion rates due to Callbox's lead generation efforts.

  • Professional and Knowledgeable Team

    The professionalism and industry knowledge of Callbox's team have been consistently praised, with clients appreciating their ability to understand complex business needs and deliver appropriate solutions.

  • Effective in Building Long-Term Relationships

    Callbox's efforts have not only increased immediate sales opportunities but also fostered long-term relationships with prospects, contributing to sustained business growth for clients.

  • Challenges with Non-English Speaking Markets

    Some clients have noted challenges in markets where English is not the primary language, suggesting the need for multilingual support to improve engagement in regions like Vietnam and China.

Callbox Reviews

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Services
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Industry
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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.

Demand Generation Services for Consulting Company

  • Other IT Consulting and SI
  • $10,000 to $49,999
  • Jan. 2021 - Ongoing
4.5
Quality
4.5
Schedule
4.5
Cost
4.0
Willing to Refer
4.5

"They always take feedback positively and are remarkable at following up."

Mar 18, 2021
Head of Sales & Marketing, Simplify Consulting Sdn. Bhd.
Kesava Voodi
Verified
  • Other industries
  • Kuala Lumpur, Malaysia
  • 11-50 Employees
  • Online Review
  • Verified

Callbox provides ongoing demand generation services for a consulting company. The team creates a list of targeted prospects which helps the client with content development for their lead generation initiatives.

Sales Consulting for IT Services Company

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

"They have always taken feedback positively and are remarkable at following up."

Mar 17, 2021
Head of Sales & Marketing, IT Services Company
Anonymous
  • Other industries
  • Kuala Lumpur, Malaysia
  • 11-50 Employees
  • Online Review

Callbox provides consultation for an IT services company to help with their demand generation initiatives such as event management, inside sales, and digital marketing.

Clutch verification provides an additional layer of data to help you make the right purchasing decision of business services.

Learn More
Verified Client Reviews
112
Overall Review Rating
4.6
Source
Clutch
Last Updated
March 4, 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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