• Post a Project

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 for lead generation services, with clients noting good value for cost. Engagements range from $12,000 to $80,000 annually, with flexible payment options. Clients appreciate the quality of leads generated and the effective communication throughout projects.

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

    Overall, clients express high satisfaction with Callbox's services, noting their ability to deliver results, enhance brand awareness, and provide valuable lead generation support. Many clients have renewed their contracts due to positive outcomes.

  • Commitment to Client Success

    Clients appreciate Callbox's dedication to achieving business objectives and their proactive approach to overcoming challenges. Their commitment to client success is evident in their willingness to go above and beyond.

  • Adaptability and Flexibility

    Callbox is noted for their flexibility in adapting to client needs and processes. They are open to feedback and willing to make adjustments to improve campaign performance, ensuring a tailored approach for each client.

  • Need for Improved Reporting

    Some clients have noted that Callbox could enhance their reporting capabilities by providing more detailed insights and analysis. This would help clients better understand campaign performance and make informed decisions.

  • Strong Project Management

    Clients frequently praise Callbox for their project management skills, highlighting their responsiveness, structured approach, and ability to meet deadlines. Regular communication and weekly meetings ensure transparency and alignment with client goals.

  • Effective Multichannel Marketing

    Callbox employs a comprehensive multichannel marketing strategy, including email, social media, and telemarketing. This approach has been effective in generating awareness, engaging prospects, and driving conversions.

Callbox Reviews

Submit a Review
All Filters

0 selected

Sort by
Services
Project Cost
Industry
Location

Account-Based Mktg for Digital Commerce Solutions Co

  • Account-Based Marketing Demand Generation Marketing
  • Confidential
  • Oct. 2025 - Ongoing
4.5
Quality
4.0
Schedule
5.0
Cost
4.5
Willing to Refer
4.5

“Callbox’s team is hardworking, won’t give up, and is always open to adapting.”

Aug 26, 2026
Manager, Nisum
Anonymous
Verified
  • Information technology
  • Brea, California
  • 1,001-5,000 Employees
  • Online Review
  • Verified

Callbox provides account-based marketing (ABM) services for a digital commerce solutions company. The team works in alignment with the client's strategy, playing a key role in generating a curated lead list.

SMM, Content Writing & SEO for Revenue Platform

  • Content Writing Services Search Engine Optimization Social Media Marketing
  • Case Study Writing Content development
  • Confidential
  • Nov. 2025 - Ongoing
5.0
Quality
4.5
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"Callbox's accommodation and openness to feedback are impressive."

Aug 25, 2026
CEO, Revenue Platform
Anonymous
Verified
  • Information technology
  • New York, United States
  • 1-10 Employees
  • Online Review
  • Verified

Callbox provides marketing services for a revenue platform. The team manages social media accounts and creates content, including post copy, blogs, and newsletters, and produces sales and marketing collateral.

Lead Generation for Telecommunications Company

  • Demand Generation Marketing
  • Confidential
  • Jan. 2021 - Ongoing
4.5
Quality
4.5
Schedule
4.5
Cost
4.0
Willing to Refer
3.0

"I'm impressed with Callbox's dedication to quality lead generation and follow-through."

Aug 22, 2026
Manager, The Maynard Group
David Atkinson-Smith
Verified
  • Telecommunications
  • Soquel, California
  • 51-200 Employees
  • Online Review
  • Verified

Callbox provides lead generation services for a telecommunications company. The team delivers a list of qualified leads and sets appointments.

Content Marketing & Marketing Strategy for ISO Consultancy

  • Content Marketing Marketing Strategy
  • Confidential
  • Aug. 2026 - Ongoing
4.0
Quality
4.0
Schedule
5.0
Cost
4.0
Willing to Refer
4.0

"We've had a great experience with Callbox so far."

Aug 21, 2026
Head of Sales & Marketing, ISO Consultancy
Anonymous
Verified
  • Business services
  • Stockport, England
  • 1-10 Employees
  • Online Review
  • Verified

Callbox provides marketing strategy and content marketing services for an ISO consultancy. The team is responsible for improving the client's website authority score and generating leads.

Telesales Services for HVAC & Refrigeration Solutions Co

  • Call Center Services Sales Outsourcing
  • B2B Appointment Setting B2B Lead Generation
  • Confidential
  • May 2026 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"Callbox utilizes a team approach to spread work among a number of their personnel."

Aug 20, 2026
Owner, Alliance Mechanical Services
Cody Edge
Verified
  • HVAC
  • Euless, Texas
  • 11-50 Employees
  • Online Review
  • Verified

Callbox provides telesales services for an HVAC and refrigeration solutions company. The team contacts potential customers, introduces the client's services, and books discovery meetings with the sales team.

Lead Generation for PropTech Company

  • Sales Outsourcing
  • $10,000 to $49,999
  • Dec. 2024 - Mar. 2025
5.0
Quality
5.0
Schedule
5.0
Cost
4.5
Willing to Refer
5.0

"They are communicative, reliable, and transparent."

Jan 13, 2025
Sales Operations, PropTech Company
Anonymous
Verified
  • Information technology
  • Singapore
  • 11-50 Employees
  • Online Review
  • Verified

Callbox provides lead generation services for a proptech company. The team is responsible for collecting additional information through the client's existing database.

Sales Outsourcing for Software Company

  • Sales Outsourcing
  • B2B Appointment Setting B2B Lead Generation B2B Lead Qualification
  • $10,000 to $49,999
  • Oct. 2024 - Apr. 2025
3.5
Quality
3.5
Schedule
4.5
Cost
3.0
Willing to Refer
3.5

"They worked collaboratively with us to understand our business."

Jan 9, 2025
Operations Manager, Parker Software Inc
Samantha Rutter
Verified
  • Other industries
  • England
  • 11-50 Employees
  • Online Review
  • Verified

A software company hired Callbox to reach out to their target audience within the US and discuss their products and USPs. This involved arranging meetings for the client's sales consultants.

Lead Generation for Cybersecurity Solutions Provider

  • Call Center Services Sales Outsourcing
  • Confidential
  • Aug. 2021 - Ongoing
4.5
Quality
4.5
Schedule
4.5
Cost
5.0
Willing to Refer
4.0

"Callbox's dedication to providing all-around marketing services and their positive, can-do attitude are impressive."

Dec 31, 2024
Marketing, Cybersecurity Solutions Provider
Anonymous
Verified
  • Information technology
  • San Jose, California
  • 1,001-5,000 Employees
  • Online Review
  • Verified

Callbox provides lead generation services for a cybersecurity solutions provider. The team contacts the client's white space ICP, sets up sales appointments, and drives webinar registrations.

Lead Generation Services for IT Solutions Provider

  • Call Center Services
  • $10,000 to $49,999
  • Sep. - Nov. 2024
3.0
Quality
3.0
Schedule
3.0
Cost
3.0
Willing to Refer
3.0

"Callbox's customer engagement services were impressive."

Dec 20, 2024
Marketing, IT Solutions Provider
Anonymous
Verified
  • Other industries
  • Singapore
  • 11-50 Employees
  • Online Review
  • Verified

Callbox was hired by an IT solutions provider for demand generation and lead appointment services. The team is also responsible for customer engagement.

Demand Generation Marketing for IT Consulting & Services Co

  • Branding Demand Generation Marketing Market Research
  • $10,000 to $49,999
  • Oct. 2023 - Aug. 2024
5.0
Quality
5.0
Schedule
5.0
Cost
4.0
Willing to Refer
4.5

"The account manager was competent, and the team in general was good."

Dec 20, 2024
Pre Sales Head, IT Consulting & Services Company
Anonymous
  • Other industries
  • Singapore
  • 11-50 Employees
  • Online Review

Callbox provided demand generation services for an IT consulting firm. The tasks included managing social media campaigns, event and webinar management, and SAP products and services.

Premier Verified means Clutch independently confirmed Callbox is a legally registered business,
financially sound (Creditsafe: Low Risk), and backed by 121 verified client reviews averaging 4.6 stars.

Learn More
Verified Client Reviews
121
Overall Review Rating
4.6
Source
Clutch
Last Updated
August 29, 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

Contact Callbox

If you’re not seeing exactly what you need here, send this company a custom message. You can talk about your project needs, price, and timeline to get started on your project.

Connect with Callbox on Social

Get connected to see updates from Callbox like new case studies, latest reviews, their latest masterpieces in their portfolio, delivered straight to you.

Alliance Mechanical Services, LLC

(1)
Alliance Mechanical Services, LLC Logotype

Cody Edge

DataHub Innovations

(1)
DataHub Innovations Logotype

Mit Patel

Maus Software

(1)
Maus Software Logotype

Aaron Stine

The Maynard Group

(1)
The Maynard Group Logotype

David Atkinson-Smith

Additional Connections

(2)