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Top B2B Lead Generation Experts Worldwide

Since 2004, Callbox has been the trusted leader and top lead generation company, driving growth for businesses worldwide. As the largest and most experienced player in the B2B lead generation field, we offer comprehensive solutions encompassing lead generation, appointment setting, and data-driven strategies designed to fuel your success. Our multi-touch, multi-channel approach sets us apart. We seamlessly integrate live conversations with email, social media, search, and direct marketing, ensuring engagement with key decision-makers at every stage of the conversion cycle. This holistic strategy maximizes your ROI and delivers qualified leads.

  • 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

No have been added yet...

    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 a focus on value for cost, delivering high-quality leads and appointments. Clients note positive ROI and effective project management, often exceeding lead generation expectations. Their flexibility and responsiveness are highlighted, though some suggest improvements in regional market understanding and lead qualification.

    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

    • Challenges with Non-English Markets

      Some clients indicate that Callbox could improve their effectiveness in non-English speaking markets. Expanding language capabilities could enhance their reach and lead generation in diverse regions.

    • Multi-Channel Marketing Approach

      Callbox uses a comprehensive multi-channel marketing approach, including telemarketing, email, and social media, to reach potential leads. This strategy is appreciated for its effectiveness in broadening reach and improving lead quality.

    • High Client Satisfaction and Long-Term Partnerships

      Many clients express satisfaction with Callbox’s services, leading to long-term partnerships. Clients appreciate their commitment to achieving business objectives and their willingness to adjust strategies to improve outcomes.

    • Strong Project Management and Communication

      Clients praise Callbox for their project management skills, noting their responsiveness, regular updates, and effective communication. Weekly meetings and detailed reports keep clients informed and engaged.

    • Effective Lead Generation and Appointment Setting

      Callbox consistently delivers qualified leads and appointments, exceeding client expectations. Clients report a significant increase in sales opportunities, indicating Callbox’s effectiveness in lead generation and nurturing processes.

    • Competitive Pricing and Value

      Clients find Callbox’s pricing competitive and the services offered provide good value, especially in comparison to other vendors. This is a significant factor in selecting Callbox as a partner.

    Callbox Reviews

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    Services
    Project cost

    Advertising & Marketing for Janitorial & Housekeeping Comp

    • Advertising
    • Less than $10,000
    • Sep. 2020 - Ongoing
    4.0
    Quality
    4.0
    Schedule
    4.0
    Cost
    4.0
    Willing to Refer
    4.0

    "There is always somebody in the other line to help and sort things out."

    Feb 8, 2021
    Sales Director, Janitorial & Housekeeping Company
    Greyven Landergren
    Verified
    • Arts, entertainment & music
    • Port Saint Lucie, Florida
    • 51-200 Employees
    • Online Review
    • Verified

    A janitorial, building maintenance, and housekeeping company hired Callbox to setup a person-to-person appointment to close more potential buyers.

    Tele-Sales Services for Healthcare IT Startup

    • Call Center Services
    • $10,000 to $49,999
    • Jan. - Sep. 2018
    4.5
    Quality
    4.5
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    5.0

    "Callbox provided a team of impressive support people that worked with us on a routine basis."

    Jan 29, 2021
    Co-Founder & CEO, Twiage
    John Hui
    Verified
    • Other industries
    • New York City, New York
    • 11-50 Employees
    • Online Review
    • Verified

    Callbox provided tele-sales services for a healthcare IT startup. 

    Systems Development for IoT GPS Tracking Service

    • IT Staff Augmentation
    • $10,000 to $49,999
    • Jan. 2016 - Sep. 2019
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    5.0

    “They do what they say they will, and they do it well.”

    Aug 23, 2019
    CEO, GPS Service
    Anonymous
    Verified
    • Other industries
    • Phoenix, Arizona
    • 11-50 Employees
    • Online Review
    • Verified

    Callbox provided development services, working on a series of cellular-based systems.

    Lead Generation for Administration Department

    • Call Center Services
    • Less than $10,000
    • Jan. 2016 - Ongoing
    4.5
    Quality
    5.0
    Schedule
    4.5
    Cost
    5.0
    Willing to Refer
    5.0

    "They save us several hours per day."

    Nov 2, 2017
    Adminstration Department Owner
    Anonymous
    • Other industries
    • Miami, Florida
    • 1-10 Employees
    • Survey Response

    Telemarketing & Lead Generation for Advertising Company

    • Call Center Services
    • Less than $10,000
    • Dec. 2013 - Ongoing
    4.5
    Quality
    4.0
    Schedule
    4.5
    Cost
    4.5
    Willing to Refer
    4.5

    "[Their service] is really helpful."

    Nov 2, 2017
    Marketing Manager, Advertising Company
    Anonymous
    • Advertising & marketing
    • San Diego, California
    • 11-50 Employees
    • Survey Response

    Appointment Setting for Business Service

    • Call Center Services
    • Less than $10,000
    • Jan. 2014 - Ongoing
    4.5
    Quality
    4.5
    Schedule
    4.5
    Cost
    4.5
    Willing to Refer
    4.5

    "Their service is very on point and easy to use."

    Nov 2, 2017
    CEO, Business Service
    Anonymous
    • Other industries
    • Tampa, Florida
    • 51-200 Employees
    • Survey Response

    Telemarketing Services for Transportation Company

    • Call Center Services
    • Less than $10,000
    • Oct. 2016 - Ongoing
    5.0
    Quality
    4.5
    Schedule
    5.0
    Cost
    4.5
    Willing to Refer
    4.5

    "Their service saves us money."

    Nov 2, 2017
    Senior IT Manager, Transportation Company
    Anonymous
    • Other industries
    • Elk Grove Village, Illinois
    • 501-1,000 Employees
    • Survey Response

    Appointment Scheduling for IT Company

    • Call Center Services
    • Less than $10,000
    • Jan. 2017 - Ongoing
    4.0
    Quality
    4.0
    Schedule
    4.5
    Cost
    4.0
    Willing to Refer
    4.5

    "They are a great solution to my company's needs."

    Aug 16, 2017
    IT Manager, Information Technology Company
    Anonymous
    • Other industries
    • Salem, Oregon
    • 5,001-10,000 Employees
    • Survey Response

    Appointment Setting for Consumer Products Company

    • Call Center Services
    • Less than $10,000
    • Jan. 2015 - Ongoing
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    5.0

    "They improved our revenue."

    Aug 12, 2017
    Senior Manager, Consumer Products Company
    Anonymous
    • Other industries
    • Brockton, Massachusetts
    • 5,001-10,000 Employees
    • Survey Response

    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
    May 8, 2025

    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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