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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

    • 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.

    • 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.

    • 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.

    • 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.

    • 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.

    • 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.

    Callbox Reviews

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    Lead Generation for Marketing Technology Consulting Firm

    • Other IT Consulting and SI
    • $10,000 to $49,999
    • Aug. 2022 - Mar. 2023
    4.5
    Quality
    4.0
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    4.5

    "They've been very effective."

    Oct 4, 2022
    COO, Marketing Technology Consulting Firm
    Anonymous
    Verified
    • Other industries
    • Denver, Colorado
    • 51-200 Employees
    • Online Review
    • Verified

    A marketing technology solutions company has collaborated with Callbox for lead generation. The team handles the company's inbound and outbound calls, email campaigns, and social media to increase leads. 

    Lead Generation for Operational Management Platform

    • Content Marketing
    • Confidential
    • Jan. 2021 - Ongoing
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    5.0

    "They have constantly worked hard to refine and optimize our engagement."

    Sep 13, 2022
    Senior Business Development Executive, OpsVeda, Inc
    Perry Rowdy
    Verified
    • Other industries
    • Greensboro, North Carolina
    • 11-50 Employees
    • Online Review
    • Verified

    Callbox is the lead generation partner for an operational management platform. They provide outreach services to potential clients and utilize multiple communication channels to generate leads.

    Lead Generation for Software Development Company

    • Call Center Services
    • $10,000 to $49,999
    • Aug. 2022 - Ongoing
    5.0
    Quality
    5.0
    Schedule
    4.5
    Cost
    5.0
    Willing to Refer
    5.0

    "Callbox provides support from scratch, and they ensure they support your project each step of the way."

    Sep 12, 2022
    Head of International Business, Software Development Company
    Edmundo Castro Molestina
    Verified
    • Other industries
    • Hollywood, Florida
    • 11-50 Employees
    • Online Review
    • Verified

    Callbox supports a software development company's lead generation initiatives by implementing outbound approaches. They manage marketing through different channels such as phone calls, emails, and social media.

    Lead Generation Services for Decision Intelligence Firm

    • Call Center Services
    • $10,000 to $49,999
    • June 2022 - Ongoing
    5.0
    Quality
    4.5
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    4.5

    "Their professionalism and ability to speak English perfectly is impressive."

    Aug 29, 2022
    Managing Partner, Decision Intelligence Firm
    Anonymous
    Verified
    • Other industries
    • Raleigh, North Carolina
    • 11-50 Employees
    • Online Review
    • Verified

    Callbox provides lead generation services for a decision intelligence firm. They've provided a curated list of prospects based on the client's ICP and then conducted outreach efforts across multiple channels.

    Appointment Setting for B2B Services Company

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

    "They were wonderful to work with, and we communicated regularly."

    Jun 8, 2022
    Sales & Marketing Manager, B2B Services Company
    Bill Pace
    Verified
    • Financial services
    • Towson, Maryland
    • 11-50 Employees
    • Online Review
    • Verified

    Callbox was a B2B services company’s appointment setter. Their team conducted cold calls to small- and medium-sized businesses and used HubSpot to log information. 

    Lead Generation for Dental Care Company

    • Other Digital Marketing
    • Confidential
    • Feb. 2021 - Ongoing
    5.0
    Quality
    5.0
    Schedule
    4.5
    Cost
    4.5
    Willing to Refer
    5.0

    "Their workflow is very effecitve, and they deliver on time."

    May 3, 2022
    VP of Sales & Marketing, Keating Dental Lab
    Nick Azar
    Verified
    • Other industries
    • Irvine, California
    • 51-200 Employees
    • Online Review
    • Verified

    Callbox has been hired by a dental lab for their lead generation services. Their main task involves cold calling and setting appointments with prospective customers. The goal is to acquire 3–4 customers weekly.

    Lead Generation & Digital Marketing for Business Consultancy

    • Advertising Content Marketing Direct Marketing Marketing Strategy Other Digital Marketing
    • $50,000 to $199,999
    • Jan. 2007 - Ongoing
    4.0
    Quality
    4.0
    Schedule
    4.0
    Cost
    3.0
    Willing to Refer
    5.0

    "They’re very responsive from a project management perspective."

    Apr 20, 2022
    Principal, Alliance Cost Containment
    Eileen Flarity
    Verified
    • Other industries
    • Louisville, Kentucky
    • 11-50 Employees
    • Phone Interview
    • Verified

    A business consultancy was looking to extend their reach and garner appointments with prospective clients, so they engaged with Callbox for their lead generation and digital marketing services.

    Lead Generation for Telecommunications Company

    • Call Center Services
    • $10,000 to $49,999
    • Jan. 2021 - Jan. 2022
    0.5
    Quality
    0.5
    Schedule
    0.5
    Cost
    0.5
    Willing to Refer
    0.5

    "We spent a ton of money and got next to nothing."

    Apr 20, 2022
    Director of Sales, Metropark Communications
    Megan Bruns
    Verified
    • Telecommunications
    • Earth City, Missouri
    • 11-50 Employees
    • Online Review
    • Verified

    Callbox provided lead generation and appointment setting services for a telecommunications company. They implemented outreach campaigns over the phone and through LinkedIn and social media. 

    Lead Generation for Technology Company

    • Advertising Direct Marketing
    • $10,000 to $49,999
    • Apr. 2022 - Ongoing
    4.5
    Quality
    4.5
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    4.0

    "If you’re a small company and need to build your sales team or marketing department, then they’re a great team." 

    Apr 7, 2022
    BPO Sales & Marketing
    Merv Charles
    Verified
    • Other industries
    • Phone Interview
    • Verified

    Callbox provides lead generation services in the form of cold-calling and email marketing. They also schedule appointments and collaborate on scripts. 

    Lead Generation for Structural Repair Solutions Company

    • Call Center Services
    • $10,000 to $49,999
    • Feb. 2022 - Ongoing
    5.0
    Quality
    5.0
    Schedule
    4.5
    Cost
    5.0
    Willing to Refer
    5.0

    "They are very professional, quick to respond, and on-point."

    Apr 1, 2022
    Assistant Marketing Manager, Rhino Carbon Fiber
    Paul Trzcinko
    Verified
    • Other industries
    • Mississauga, Ontario
    • 51-200 Employees
    • Online Review
    • Verified

    Callbox provides call center services for a structural repair solutions company. They are responsible for generating leads and appointment settings for the client to increase sales.

    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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