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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

    • 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.

    • 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.

    • 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.

    • 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.

    • 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.

    Callbox Reviews

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    Appointment Scheduling for Managed IT Services Provider

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

    "They are responsive and act as though they are an extended part of our company."

     
    Feb 12, 2021
    Director of Business Development, Excensure
    Steve Moisoff
    Verified
    • Other industries
    • New York City, New York
    • 1-10 Employees
    • Online Review
    • Verified

    Callbox is the partner of a managed IT services provider in scheduling appointments with prospective clients. The goal of the project is to schedule up to 20 appointments monthly and close a percentage of them.

    Telemarketing & Lead Generation for Medical Imaging Company

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

    “We’ve definitely gained business tied to work that Callbox does.”

    Feb 11, 2021
    Director of Marketing, Precision Image Analysis
    Anonymous
    Verified
    • Other industries
    • Seattle, Washington
    • 11-50 Employees
    • Phone Interview
    • Verified

    Callbox provides telemarketing services for a hospital image post-processing company. They use a script, conduct email outreach, and use a multi-touch approach to secure qualified leads.

    Lead Generation for IT Cloud Services Company

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

    "Their structure, systems, and methods are all very impressive."

    Feb 9, 2021
    VP Sales, Backup Technology
    Mike Colesante
    • Other industries
    • Houston, Texas
    • 11-50 Employees
    • Online Review

    An IT cloud services company hired Callbox in order to help them generate leads and revenue. The team is responsible for taking a multimedia approach to lead generation and appointment setting.

    Lead Generation Campaign for IT Outsourcing Company

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

    "We have a total team approach from both parties which has made this a pleasant and successful campaign to date."

    Feb 9, 2021
    Director of Sales, IT Outsourcing Firm
    Jim Lumpkin
    Verified
    • Other industries
    • Atlanta, Georgia
    • 11-50 Employees
    • Online Review
    • Verified

    An IT outsourcing company needed to establish brand recognition and develop leads. They partnered with Callbox to develop marketing campaigns that will generate qualified leads.

    Appointments & Leads for Technology Company

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

    "Callbox has gotten us over 80 solid leads and/or appointments, which our inside teams are now working."

    Feb 9, 2021
    Sales & Marketing Liaison, Technology Company
    Kira Stone
    Verified
    • Other industries
    • Washington, District of Columbia
    • 51-200 Employees
    • Online Review
    • Verified

    A technology company partnered with Callbox in order to take the lead on their appointment setting and lead gathering efforts to help their business development and sales teams.

    Outreach Optimization for Marketing & Tech Company

    • Digital Strategy
    • $10,000 to $49,999
    • Dec. 2020 - Ongoing
    4.5
    Quality
    4.5
    Schedule
    5.0
    Cost
    4.5
    Willing to Refer
    5.0

    "We create the best workflow possible and we're still trying to improve it."

    Feb 8, 2021
    Senior Vice President, Atypical Digital
    Anonymous
    Verified
    • Advertising & marketing
    • New York City, New York
    • 201-500 Employees
    • Online Review
    • Verified

    Callbox was hired by a marketing and technology company to help optimize their outreach program. The team serves as an extension for the client's business development process.

    Outbound Campaign for Inheritance Funding Company

    • Call Center Services
    • Confidential
    • Dec. 2019 - Dec. 2020
    4.5
    Quality
    5.0
    Schedule
    4.0
    Cost
    4.5
    Willing to Refer
    5.0

    "Their responsiveness was impressive."

    Feb 8, 2021
    VP of Business Development, Inheritance Funding Company
    Anonymous
    Verified
    • Financial services
    • West Palm Beach, Florida
    • 11-50 Employees
    • Online Review
    • Verified

    An inheritance funding company wanted to do an educational campaign across the country to inform their target audience regarding their services. They partnered with Callbox to provide the necessary services.

    Introductory Phone Calls for Insurance Resource Firm

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

    "Callbox did a great job of discovering who we were and who we needed to connect with."

    Feb 8, 2021
    Director of Operations, AdvisorServe
    Turner Lee
    Verified
    • Financial services
    • Woodstock, Georgia
    • 1-10 Employees
    • Online Review
    • Verified

    To help an insurance resources firm connect with more prospective clients, Callbox reached out to fee-only financial advisors. They helped set introductory calls via phone, email, and LinkedIn marketing. 

    B2B Appointment Setting Services for Finance Company

    • Call Center Services
    • $10,000 to $49,999
    • Nov. 2019 - Ongoing
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    5.0

    "They are very professional and responsive."

    Feb 7, 2021
    CEO, ProbateCash
    Robin Shapiro
    Verified
    • Financial services
    • West Palm Beach, Florida
    • 11-50 Employees
    • Online Review
    • Verified

    Callbox provides B2B appointment setting services for a finance firm. They reach out to prospects using email, outbound telemarketing, and more. Then, they set up appointments with the client's internal staff.

    Lead Generation Call Center Svcs for Medical Device 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 have an excellent workflow."

    Feb 5, 2021
    President & Founder, ARC Medical, Inc.
    Hal Norris
    Verified
    • Other industries
    • Tucker, Georgia
    • 1-10 Employees
    • Online Review
    • Verified

    Callbox provides call center services to a medical device company in order to enhance their lead generation efforts. The team reaches out to potential customers and sets up Zoom meetings with the client's reps.

    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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