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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.

    • 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.

    • 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.

    • 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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    Demand Generation Marketing for IT Consulting & Services Co

    • Branding Demand Generation Marketing Market Research
    • $10,000 to $49,999
    • Oct. 2023 - Aug. 2024
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    4.0
    Willing to Refer
    4.5

    "The account manager was competent, and the team in general was good."

    Dec 20, 2024
    Pre Sales Head, IT Consulting & Services Company
    Anonymous
    • Other industries
    • Singapore
    • 11-50 Employees
    • Online Review

    Callbox provided demand generation services for an IT consulting firm. The tasks included managing social media campaigns, event and webinar management, and SAP products and services.

    Sales Outsourcing for IT Company

    • Sales Outsourcing
    • Confidential
    • Dec. 2024 - Feb. 2025
    4.5
    Quality
    5.0
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    5.0

    "They were friendly and professional."

    Dec 19, 2024
    Head of Business Development, IT Company
    Anonymous
    Verified
    • Information technology
    • Singapore
    • 51-200 Employees
    • Online Review
    • Verified

    Callbox worked with an IT company to build their sales funnel. They led the client's database curation and enrichment efforts, created lead generation collateral, and handled appointment-setting.

    Lead Generation for IT Company

    • Account-Based Marketing Email Marketing Sales Outsourcing
    • $10,000 to $49,999
    • Nov. 2024 - Ongoing
    4.5
    Quality
    5.0
    Schedule
    5.0
    Cost
    4.0
    Willing to Refer
    4.0

    "We're impressed with their professionalism, detail-oriented approach, and timely delivery."

    Dec 18, 2024
    CEO, IT Company
    Anonymous
    Verified
    • Information technology
    • Australia
    • 1-10 Employees
    • Online Review
    • Verified

    Callbox provides lead generation services for an IT company. They've reached out to potential prospects based on the client's ICP. The team has also created a pipeline of qualified leads and appointments.

    Lead Generation for 3D Visualization Software Company

    • Market Research
    • Confidential
    • June - Dec. 2023
    4.0
    Quality
    4.0
    Schedule
    4.0
    Cost
    4.0
    Willing to Refer
    4.0

    "CallBox had a professional workflow and good execution process."

    Dec 18, 2024
    Business Development Manager, Trimble Solutions (SEA)
    Anonymous
    Verified
    • Other industries
    • Bangkok, Thailand
    • 11-50 Employees
    • Online Review
    • Verified

    Callbox provided lead generation services for a 3D modeling and visualization software company.

    SEO, Event Marketing & Sales Outsourcing for MSP

    • Event Marketing Sales Outsourcing Search Engine Optimization
    • $10,000 to $49,999
    • Nov. 2024 - Ongoing
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    5.0

    "The results are delivered on activity levels and client meetings."

    Dec 17, 2024
    VP of Sales, Managed Service Provider
    Anonymous
    Verified
    • Information technology
    • Newport Beach, California
    • 11-50 Employees
    • Online Review
    • Verified

    Callbox provides business development, SEO, and event marketing services for a managed service provider (MSP). The team is responsible for email outreach, cold calling, and website optimization.

    Lead Gen & Appointment Setting for Financial Services Firm

    • Demand Generation Marketing Sales Outsourcing
    • $10,000 to $49,999
    • Sep. 2024 - Ongoing
    4.5
    Quality
    5.0
    Schedule
    4.5
    Cost
    4.0
    Willing to Refer
    4.5

    "We're impressed with their good reporting and responsive teams."

    Dec 17, 2024
    Senior Marketing Manager, Financial Services Company
    Lucassen Salim
    Verified
    • Financial services
    • Singapore
    • 51-200 Employees
    • Online Review
    • Verified

    Callbox provides demand generation services for a financial services firm. The team is responsible for finding databases, conducting lead generation campaigns, and setting appointments.

    Lead Generation for Cybersecurity Company

    • Demand Generation Marketing Media Planning & Buying Other Digital Marketing
    • Confidential
    • Jan. - Dec. 2024
    4.5
    Quality
    4.5
    Schedule
    4.5
    Cost
    4.5
    Willing to Refer
    4.5

    "Callbox's professionalism, efficiency, and commitment to results truly set them apart."

    Dec 17, 2024
    Digital Marketing Manager, Cybersecurity Company
    Anonymous
    Verified
    • Information technology
    • Singapore
    • 10,001+ Employees
    • Online Review
    • Verified

    Callbox provided lead generation services for a cybersecurity company. The team delivered BANT leads and drove RSVPs for the client's webinars and events.

    Lead Generation for Venture Capital Firm

    • Sales Outsourcing
    • Confidential
    • Nov. 2024 - Ongoing
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    4.5
    Willing to Refer
    5.0

    "They have a very friendly and approachable staff."

    Dec 16, 2024
    Portfolio Manager & Advisory, 5I Ventures
    Kevin Chang
    Verified
    • Business services
    • Singapore
    • 1-10 Employees
    • Online Review
    • Verified

    Callbox provides lead generation services for a venture capital firm. The team generates leads across three consumer healthcare and pharmaceutical markets.

    Demand Generation Services for Healthcare Company

    • Conversion Optimization Demand Generation Marketing Email Marketing
    • $10,000 to $49,999
    • Nov. 2024 - Ongoing
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    4.0
    Willing to Refer
    5.0

    "They're open to feedback and suggestions on how to improve the process further to get the best possible ROI."

    Dec 16, 2024
    Product Manager, Healthcare Company
    Alan Osbucan
    • Other industries
    • Taguig, Philippines
    • 501-1,000 Employees
    • Online Review

    Callbox provides demand generation services for a healthcare firm. They conduct 800 weekly outreach activities, set appointments, create email and social media content, build landing pages, and set up HubSpot.

    Lead Generation for Global Trade & Service Provider

    • Call Center Services Other Digital Marketing
    • Confidential
    • Sep. - Nov. 2022
    4.5
    Quality
    5.0
    Schedule
    4.5
    Cost
    4.5
    Willing to Refer
    4.5

    "We were impressed by their long-time experience and willingness to bring value to both sides."

    Nov 7, 2022
    Commercial Manager, Arian Holding
    Hosein Hashemian
    Verified
    • Other industries
    • Iraq
    • 51-200 Employees
    • Online Review
    • Verified

    Callbox spearheaded a global trade and service provider's lead generation efforts to get active leads from Europe and USA. They leveraged the integrated marketing plan to target potential clients.

    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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