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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

    • 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.

    • Professionalism and Customer Service

      Callbox’s professionalism and customer service are frequently highlighted. Clients note their courteous and proactive approach, ensuring a smooth and productive collaboration.

    • 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.

    • Flexibility in Campaign Adjustments

      Callbox is noted for their flexibility in adjusting campaigns based on client feedback and changing market conditions. This adaptability is crucial for optimizing lead generation efforts.

    • 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.

    • Industry Expertise and Adaptability

      Callbox’s ability to understand client industries and adapt strategies accordingly is highly valued. They take time to learn about client businesses, which enhances their ability to generate relevant leads.

    Callbox Reviews

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    Lead Generation for Economic Development Marketing Agency

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

    “Whenever we ask for something, they take care of it right away.”

    Mar 4, 2021
    Partner, CQNS
    Chris Hokansson
    Verified
    • Advertising & marketing
    • Oakville, Ontario
    • 1-10 Employees
    • Phone Interview
    • Verified

    Callbox provides voice services for a marketing agency. They handle appointment setting and lead generation efforts in efforts to reach qualified candidates and qualify them for sales and appointments.

    Outbound Sales & Marketing Calls for IT Services Provider

    • Call Center Services
    • $50,000 to $199,999
    • Jan. 2021 - Ongoing
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    5.0

    "They are extremely organized and methodical."

     
    Feb 25, 2021
    Vice President, IT-Henhouse
    Ann Fields
    Verified
    • Other industries
    • Charlotte, North Carolina
    • 1-10 Employees
    • Online Review
    • Verified

    Callbox was engaged by a business IT services provider for outbound sales and marketing solutions. The team's main task is to qualified leads and schedule appointments to increase the client's revenue.

    B2B Lead Generation & Sales for IT Services Company

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

    "I found their level of professionalism and dedication to our efforts the most impressive."

    Feb 24, 2021
    CTO, DV8 Infosystems, Inc
    Bill Faruki
    Verified
    • Other industries
    • Irvine, California
    • 11-50 Employees
    • Online Review
    • Verified

    An IT services company partnered with Callbox to take charge of their B2B lead generation, appointment setting, and initial contact with new prospects.

    Call Marketing Services for Industrial Information Provider

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

    "I was (and still am) very impressed with the ability of the Callbox team to adapt to the needs of clients."

    Feb 23, 2021
    Managing Director, Industrial Info Resources
    Gordon Murray
    Verified
    • Business services
    • Japan
    • 501-1,000 Employees
    • Online Review
    • Verified

    Callbox was contracted by an industrial information provider for extended marketing support through call center services. The main objective was to boost awareness of the company's services amid the pandemic.

    Marketing & Digital Strategy for Economic Dev Marketing Co

    • Advertising Other Digital Marketing
    • $50,000 to $199,999
    • June 2020 - Ongoing
    5.0
    Quality
    4.5
    Schedule
    5.0
    Cost
    4.5
    Willing to Refer
    5.0

    “They spent time working with us to build a relationship and understand our business.”

    Feb 23, 2021
    Partner, CQNS
    Bill Elliot
    Verified
    • Advertising & marketing
    • Canada
    • 11-50 Employees
    • Phone Interview
    • Verified

    Callbox serves as the digital marketing partner to a consultancy firm. They are working on a proactive marketing campaign, identifying target markets and developing content.

    Lead Generation Campaign for Video Marketing Company

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

    "They always provide comprehensive and accurate information on leads, which is all that we really want."

    Feb 18, 2021
    Director, KOR Creative
    Steve Wallace
    Verified
    • Media
    • Auckland, New Zealand
    • 1-10 Employees
    • Online Review
    • Verified

    Callbox provided outbound lead generation services for a video marketing company, helping them reach out to potential clients. The goal was to improve the firm's ROI and develop relationships with clients.

    Appointment & Lead Gen for Cloud-based Solutions Provider

    • Call Center Services
    • $50,000 to $199,999
    • Jan. 2020 - Ongoing
    5.0
    Quality
    3.5
    Schedule
    5.0
    Cost
    1.0
    Willing to Refer
    4.0

    "Callbox has an understanding of what we do, and they’re able to articulate that accurately to our audience."

    Feb 17, 2021
    Marketing Consulting Head, Instant InfoSystems
    Anonymous
    Verified
    • Other industries
    • Torrance, California
    • 11-50 Employees
    • Phone Interview
    • Verified

    Callbox was hired by a cloud-based solutions provider to generate leads and appointments. Their marketing services include online banner and display ads as well as Google Ads campaigns.

    Multi-Touch Point Telemarketing for Big Data & AI Company

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

    "Callbox team has the mindset to drive the result."

    Feb 15, 2021
    Marketing Director, ADVANCE.AI
    Long Long
    Verified
    • Other industries
    • Singapore
    • 1,001-5,000 Employees
    • Online Review
    • Verified

    Callbox provides ongoing multi-touch telemarketing services for a leading big data and AI company. The team generates new leads and sales appointments, handles event RSVP invite, and screens potential leads.

    Call Services & Lead Generation for Software Firm

    • Call Center Services Market Research
    • $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
    • $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.

    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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