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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

    • 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.

    • 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.

    • 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.

    Callbox Reviews

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    Marketing & Telemarketing for Healthcare Software Company

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

    "The workflow between our two companies was fantastic."

    Feb 5, 2021
    Director of Sales, VOW
    Dan Wehrle
    Verified
    • Other industries
    • Pittsburgh, Pennsylvania
    • 51-200 Employees
    • Online Review
    • Verified

    Callbox provides marketing and telemarketing services for a healthcare software company. The team works to promote the client's services via a website as well as through telemarketing campaigns.

    Lead Generation for Custom & Strategic Software Dev Firm

    • Market Research
    • $10,000 to $49,999
    • Sep. 2020 - Ongoing
    4.5
    Quality
    4.0
    Schedule
    5.0
    Cost
    4.5
    Willing to Refer
    5.0

    “They’re dedicated to learning about our business and have worked hard to educate themselves.”

    Feb 4, 2021
    Client & Strategy Development, LUX interactive, LLC
    Brianne Ray
    Verified
    • Other industries
    • Troy, Michigan
    • 11-50 Employees
    • Phone Interview
    • Verified

    Callbox calls potential buyers, messages them on LinkedIn, and sends email marketing campaigns to a target audience. Then they qualify leads, schedule appointments, and provide a summary report.

    Outreach for Telehealth & Telemedicine Payment Platform

    • Advertising Pay Per Click Social Media Marketing
    • Confidential
    • Oct. 2020 - Ongoing
    4.5
    Quality
    5.0
    Schedule
    4.0
    Cost
    5.0
    Willing to Refer
    5.0

    “Once their team understood our business, they increased the number of appointments booked by 400%.”

    Feb 4, 2021
    Owner, Capital Bankcard Option
    Dan Clark
    Verified
    • Financial services
    • Newport Beach, California
    • 1-10 Employees
    • Phone Interview
    • Verified

    Callbox generates leads for their clients by conducting outreach, qualifying potential buyers, and setting up appointments. They also support PPC and social media marketing efforts.

    Sales BPO for Medical Supply Seller

    • $10,000 to $49,999
    • June 2017 - June 2018
    4.5
    Quality
    4.5
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    4.5

    "Callbox has a desire to satisfy their customers’ needs."

    Feb 2, 2021
    Former VP of Sales, Pulsecheck
    Carl Schneider
    Verified
    • Other industries
    • Brentwood, Tennessee
    • 11-50 Employees
    • Phone Interview
    • Verified

    Callbox provided call services to an emergency department software company. The team reached out to specified names using a prepared script in order to secure new accounts.

    Marketing & Lead Gen Strategies for Business Consulting Firm

    • Business Consulting Call Center Services
    • $10,000 to $49,999
    • Oct. 2020 - Ongoing
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    3.0
    Willing to Refer
    5.0

    "Their quality assurance team is dedicated to meeting our qualified lead generation goals."

    Feb 1, 2021
    Owner, Strategy Leaders
    Andi Gray
    Verified
    • Other industries
    • Norwalk, Connecticut
    • 1-10 Employees
    • Phone Interview
    • Verified

    Callbox developed a lead generation strategy that the team executes. They collect lead information and then call prospects to spur leads. They manage Google Ads and LinkedIn accounts as well as a chatbot.

    Outbound Voice Services for Bank Security Company

    • Call Center Services
    • Confidential
    • Sep. 2018 - Ongoing
    4.0
    Quality
    4.0
    Schedule
    4.5
    Cost
    4.0
    Willing to Refer
    4.5

    "Overall, we’re pleased with the results gleaned from their efforts."

    Apr 18, 2019
    Director of Marketing, Bank Security Company
    Anonymous
    Verified
    • Financial services
    • Connecticut, United States
    • 201-500 Employees
    • Phone Interview
    • Verified

    Callbox provides outbound voice services for a bank security company. They are responsible for developing scripts, contacting existing and potential clients, and responding to customer challenges.

    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
    • $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.

    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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