Since 2004, Callbox has been the trusted leader and top lead generation company, driving high-velocity growth for businesses worldwide. As the largest and most experienced player in B2B sales development, we offer comprehensive solutions from AI-powered prospecting to appointment setting designed to fuel your revenue pipeline.
Our multi-touch, multi-channel approach is built for the 2026 landscape. We seamlessly integrate intent-based conversations with email, LinkedIn, social media, search, and account-based marketing (ABM). This holistic strategy ensures engagement with key decision-makers at every stage of the conversion cycle, maximizing your ROI and delivering sales-qualified leads (SQLs).
Headquartered in Encino, CA, with a global footprint, we have successfully completed over 20,000 campaigns across diverse B2B verticals and global markets. This extensive track record makes us a top outsourced lead generation partner you can rely on.
Our Edge as a Top Lead Generation Company:
What’s New at Callbox
Co-managed Sales Development Staff Augmentation Integrate dedicated SDRs directly into your internal workflow. This model combines the control of an in-house team with Callbox’s premium data, AI-powered tech stack, and recruitment infrastructure to scale your pipeline with lower overhead.
Ready to Scale? Whether you are looking to penetrate new markets, increase conversion rates, or hit aggressive revenue targets, Callbox provides the data-driven lead generation and sales expertise to deliver measurable results. Partner with the industry leader today.
Callbox offers competitive pricing with good value for cost, frequently delivering high-quality leads and appointments. Clients appreciate the flexibility and responsiveness of their team, although some mention a desire for more personalized services and improved reporting. Overall, they are seen as a reliable partner for lead generation.
This summary is based on verified Clutch reviews.0 selected
"They were very organized and professional."
"Overall the experience is quite good with them."
Callbox provides ongoing demand generation services for an information services company. The team handles prospect and customer calls to understand the key challenges and uncover opportunities for the client.
For the past 10 years, Callbox's efforts drive awareness, promote marketing campaigns, and generate leads meeting the client's expectations. The team constantly communicates through weekly team calls. They are proactive and flexible.
"They were thorough and professional throughout the entire engagement."
Callbox provided lead generation services for an IT solutions provider. They handled Google Ads marketing for the project.
Callbox's service led to 63 leads, 43 of which were MQL. The client commended their efficient but thorough project management.
"They are doing what we expect them to do."
A portable purifier and filter company hired Callbox to head their lead generation efforts in the education, corporate, and healthcare verticals.
Callbox is adaptable, proactive, and enthusiastic. The team's tools, communication, and feedback are very helpful for the internal team.
"They were really responsive and courteous to my requests."
A cybersecurity firm partnered with Callbox in order to assist with lead generation and increase customers for their business.
Even during the COVID-19 pandemic, the Callbox team was still able to develop a pipeline for the company that provided them with 15 prospective clients per month. Even though the team needed a bit of experience in understanding the cybersecurity industry they were always responsive to the company.
"Our assigned account manager is very thorough and responsive."
Callbox performs telemarketing services for a facilities services company. They support the client's campaign. Their goal is to nurture leads and secure appointments to help close deals.
Callbox generates great leads for the company. With their efficient support, the client has achieved a high close rate. They excel at collaborating and are quick to resolve issues.
"They frequently ask for our feedback to customize and optimize our campaigns."
A communications provider hired Callbox to provide ongoing lead generation services. The team works on phone, email, and social media campaigns. The project goal is to increase the client's qualified leads.
Thanks to Callbox's efforts, the company is pleased with the number of qualified leads that they produce on an ongoing basis. The team establishes an effective workflow through weekly campaign status calls. They are always available when needed.
"We are very pleased with how the team performs."
Callbox entered a partnership with an AI software development company to provide them with customer outreach and lead generation services. The yearly targets are 3–5 customers beyond the client's internal work.
Callbox connects their partner with people in the areas of expertise that they need. They also receive a consistent number of leads per week. The team utilizes an efficient workflow, communicating concerns that need to be addressed. Their performance quality and reasonable pricing are outstanding
"Their customer service is impressive."
Callbox was hired by a cleaning services provider for lead generation efforts.
Callbox successfully delivered effective lead generation work to the client. The team is communicative with the partner, and their customer service was notable.
"Their attention to detail and process is very impressive."
Callbox performs marketing campaigns for a computer and network security firm including social media efforts. They also provide call center services to get solid leads and appointments for the company.
Since Callbox joined the project, the client has been able to reach out to more prospects and are awaiting to close a number of leads. The team frequently provides updates on their progress. Above all, they offer excellent feedback to the company. Overall, it is a successful engagement.
Showing 101-110 of 119 Reviews
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Learn More| 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 |
| International Credit Risk Assessment | Low Risk |
| Source | Creditsafe |
| Last Updated | February 2, 2021 |
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