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:
Proprietary Data Stack: Access to a vast, verified in-house B2B database with real-time intent signals.
Personalized Lead Nurturing: Automated, yet human-led programs to turn cold leads into warm prospects.
Precision ABM: Advanced Account-Based Marketing for hyper-targeted outreach to high-value accounts.
Full-Funnel Engagement: Content syndication, lead re-activation, and retargeting to maximize touchpoint density.
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.
Sales OutsourcingCall Center ServicesB2B Lead GenerationB2B Appointment Setting
Pricing Snapshot
Min. project size
Undisclosed
Avg. hourly rate
Undisclosed
Rating for cost
4.3
/5
What Clients Have Said
Callbox is perceived as offering good value for cost, with clients noting effectiveness in lead generation and appointment setting. Specific investments vary, with some clients spending between $12,000 and $80,000 annually, depending on project scope and engagement length.
Some clients noted challenges in non-English speaking markets, suggesting improvements in language capabilities could enhance effectiveness in regions like China and Vietnam, where local language proficiency is crucial.
Positive ROI and Business Growth
Several clients report positive ROI and business growth attributed to Callbox's efforts. The effective lead nurturing and appointment setting have directly contributed to increased sales and expanded client bases.
Responsive and Professional Team
Callbox is praised for its responsive and professional team. Clients often highlight their prompt communication, adaptability to feedback, and commitment to achieving project goals, resulting in smooth collaborations.
Effective Appointment Setting
Callbox excels in setting up appointments with potential clients, significantly aiding businesses in filling their sales pipelines. This service is often highlighted as a key strength by clients.
Effective Lead Generation Services
Callbox consistently delivers high-quality leads that meet client expectations. Many clients have reported increased lead volume and improved conversion rates, indicating effective lead generation strategies tailored to diverse industries.
Effective Multi-Channel Approach
Clients value Callbox's multi-channel marketing approach, which includes telemarketing, social media, and digital advertising. This strategy effectively broadens outreach and enhances engagement with target audiences.
Callbox is helping a supply chain software company generate leads from targeted accounts and contacts for their sales pipeline.
Callbox's efforts have had a positive impact on the business. They lead an effective workflow, communicate consistently, and document progress. Overall, the client had nothing but good feedback regarding the team's performance.
The client submitted this review online.
BACKGROUND
Please describe your company and your position there.
Supply Chain Software company that I manage the United States market.
OPPORTUNITY / CHALLENGE
For what projects/services did your company hire Callbox?
Lead Generation
SOLUTION
How did you select this vendor and what were the deciding factors?
Their solution offering was more complete than any alternative I'd been able to find after hours of searching.
Describe the project in detail and walk through the stages of the project.
Callbox will help us generate leads from targeted accounts and contacts to create a sales pipeline and customers.
How many resources from the vendor's team worked with you, and what were their positions?
1 - Sales
RESULTS & FEEDBACK
Can you share any outcomes from the project that demonstrate progress or success?
Success to date is limited to the selection of Callbox as my strategic vendor.
How effective was the workflow between your team and theirs?
Their workflow has been excellent.
What did you find most impressive or unique about this company?
Communication, documentation and solution offering.
Are there any areas for improvement or something they could have done differently?
Not that I'm aware of
RATINGS
5.0
Quality
5.0
Service & Deliverables
Schedule
5.0
On time / deadlines
Cost
5.0
Value / within estimates
Willing to Refer
5.0
NPS
Call Center Services for Recruitment Firm
Call Center Services
Less than $10,000
Jan. 2017 - Feb. 2022
5.0
Quality
4.5
Schedule
5.0
Cost
5.0
Willing to Refer
5.0
"We were impressed with the effort they put in."
Apr 7, 2022
President, Nearterm
Jim Higgins
Verified
Business services
Houston, Texas
11-50 Employees
Online Review
Verified
Looking to attain more leads, a recruitment firm hired Callbox for their call center services. The team was in charge of setting appointments.
Thanks to Callbox's services, the client managed to secure a number of business partnerships. By putting in the extra effort to accomplish each task, the team helped the client achieve their goals. Overall, the entire process was seamless.
The client submitted this review online.
BACKGROUND
Please describe your company and your position there.
Recruiting and Staffing president
OPPORTUNITY / CHALLENGE
For what projects/services did your company hire Callbox?
Appointment setting
SOLUTION
How did you select this agency and what were the deciding factors?
The services they offered
Describe the project in detail and walk through the stages of the project.
They provide two top quilty callers. set two appointment a week
Describe the recruitment process in detail.
They call call a list of hospitals
RESULTS & FEEDBACK
Can you share any outcomes from the engagement that demonstrate progress or success?
we made a lot of deals because of there service
How effective was the workflow between your team and theirs?
We were impressed with the effort they put in.
What did you find most impressive or unique about this company?
The effort they put in.
Are there any areas for improvement or something they could have done differently?
None
RATINGS
5.0
Quality
4.5
Service & Deliverables
Schedule
5.0
On time / deadlines
Cost
5.0
Value / within estimates
Willing to Refer
5.0
NPS
BI & Analytics for IT Consultancy Company
BI & Big Data Consulting & SI
$50,000 to $199,999
Feb. 2022 - Ongoing
5.0
Quality
5.0
Schedule
4.0
Cost
2.0
Willing to Refer
5.0
"They are very professional."
Apr 7, 2022
Founder, CINCO ENTERPRISE
Anonymous
Verified
Advertising & marketing
Miami, Florida
1-10 Employees
Online Review
Verified
Callbox has partnered with an IT consultancy company in developing a social media analysis integrated with BI. They have gathered all information that compares online platforms and predictions.
The process is simple, but Callbox shows professionalism in accomplishing the tasks, earning positive remarks from the client.
The client submitted this review online.
BACKGROUND
Please describe your company and your position there.
My Company is IT Consultant Services we offer high end and professional on the following
Staffing and outsourcing
Blockchains
Big Data
Migration Cloud
Cloud Computing
AI
OPPORTUNITY / CHALLENGE
For what projects/services did your company hire Callbox?
not yet.
SOLUTION
How did you select this vendor and what were the deciding factors?
through research via online and analysis
Describe the project in detail and walk through the stages of the project.
we are developing analysis social media integrated with BI it's an big data to gather all data informations comparative who's doing better online and predictions.
How many resources from the vendor's team worked with you, and what were their positions?
My team it's just consulting and engineer.
RESULTS & FEEDBACK
Can you share any outcomes from the project that demonstrate progress or success?
it's confidential.
How effective was the workflow between your team and theirs?
it's simple process and we are still startup business yet.
What did you find most impressive or unique about this company?
They are very professional.
Are there any areas for improvement or something they could have done differently?
Costs!
RATINGS
5.0
Quality
5.0
Service & Deliverables
Schedule
4.0
On time / deadlines
Cost
2.0
Value / within estimates
Willing to Refer
5.0
NPS
Lead Generation for SaaS Company
Content Marketing
$50,000 to $199,999
Feb. 2021 - Ongoing
4.0
Quality
4.0
Schedule
3.0
Cost
5.0
Willing to Refer
4.0
"If there are any unclear points, Callbox does not hesitate to ask me questions."
Sep 15, 2021
Marketing Director, SaaS Company
Anonymous
Verified
Other industries
Tokyo, Japan
1,001-5,000 Employees
Online Review
Verified
Callbox has been hired by a SaaS company to head their lead generation efforts. Currently, they are making a targeted list of prospects and developing marketing content.
Thanks to Callbox's ongoing support, the company has already generated a good number of leads. The team holds weekly meetings to provide updates, and they continue to approach the project in accordance with the client's strategy. However, they need to be faster in providing reports.
The client submitted this review online.
BACKGROUND
Please describe your company and your position there.
Company: Saas vendor My position: Marketing Director, APAC
OPPORTUNITY / CHALLENGE
For what projects/services did your company hire Callbox?
For DB building, and generating leads
SOLUTION
How did you select this vendor and what were the deciding factors?
We gathered a couple of proposals. And Callbox was selected as they can provide broader range of services.
Describe the project in detail and walk through the stages of the project.
Callbox builds a target list of prospects. And then develop marketing content. Then conduct account-based multi-channel lead management. The project is ongoing.
How many resources from the vendor's team worked with you, and what were their positions?
Client success manager, Product manager, and Sales development rep.
RESULTS & FEEDBACK
Can you share any outcomes from the project that demonstrate progress or success?
Callbox generated a good amount of leads.
How effective was the workflow between your team and theirs?
We are meeting on a weekly basis and monitoring the progress together.
What did you find most impressive or unique about this company?
If there are any unclear points, Callbox does not hesitate to ask me questions. I think they are working according to our strategy.
Are there any areas for improvement or something they could have done differently?
I would appreciate it if you could increase the frequency of updates and the speed at which you provide reports from webinar participants.
RATINGS
4.0
Quality
4.0
Service & Deliverables
"So far, so good"
Schedule
3.0
On time / deadlines
Cost
5.0
Value / within estimates
"I think the services are cost effective."
Willing to Refer
4.0
NPS
Telemarketing Lead Generation for Computer Software Company
Call Center Services
$10,000 to $49,999
Jan. - Aug. 2021
4.0
Quality
4.0
Schedule
4.5
Cost
2.5
Willing to Refer
4.0
"They were very organized and professional."
May 14, 2021
Sales Operations Manager, Computer Software Company
Please describe your company and your position there.
Sales Operations Manager at a Canadian software company that specializes in animation production and storyboarding software
OPPORTUNITY / CHALLENGE
For what projects/services did your company hire Callbox, and what were your goals??
Lead conversion in the APAC Territory
SOLUTION
How did you select this vendor and what were the deciding factors?
Reviewed multiple vendors, selected the Partner that best matched our existing processes.
Describe the project in detail and walk through their service package, including any calling tools used.
They reached out to a list they created, in specified markets and booked appointments for our Agents
Who did you work with and what was the feedback process like?
Edelyn and Isabel. Weekly feedback sessions
RESULTS & FEEDBACK
Can you share any measurable outcomes of the project or general feedback about the service?
They managed to set up 3-9 SDR Qualified appointments weekly.
Describe their project management style, including communication tools and timeliness.
Outside of weekly scheduled calls, Edelyn and her team were always very responsive via email or video calls.
What did you find most impressive or unique about this company?
They were very organized and professional. Their feedback reports were also informative.
Are there any areas for improvement or something they could have done differently?
Hire multilingual agents to be able to serve to non-English speaking markets.
RATINGS
4.0
Quality
4.0
Service & Deliverables
Schedule
4.5
On time / deadlines
Cost
2.5
Value / within estimates
Willing to Refer
4.0
NPS
Demand Generation Services for Information Services Company
Call Center Services
Confidential
Jan. 2020 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
4.0
Willing to Refer
5.0
"Overall the experience is quite good with them."
May 6, 2021
Regional Marketing Manager, Information Services Company
Anonymous
Verified
Other industries
Singapore
11-50 Employees
Online Review
Verified
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.
The client submitted this review online.
BACKGROUND
Please describe your company and your position there.
I'm from the marketing department
OPPORTUNITY / CHALLENGE
For what projects/services did your company hire , and what were your goals??
I have been working with Callbox for more than 10years now. We work with them to help us drive demand generation and support my marketing programs.
SOLUTION
How did you select this vendor and what were the deciding factors?
We have evaluated different vendors that are available in the marketing. When we select a vendor we look at their capabilities, skills, and cost. Callbox became top choice after these considerations.
Describe the project in detail and walk through their service package, including any calling tools used.
They call prospects and customers to understand their key challenges and uncover opportunities for us.
Who did you work with and what was the feedback process like?
I usually work with Mitos APAC Director - Client Services and Sales and her team they look after my campaigns. The team is very professional and ensures the success of my campaigns.
RESULTS & FEEDBACK
Can you share any measurable outcomes of the project or general feedback about the service?
The team helps drive more awareness, generate leads, and promote marketing campaigns.
Describe their project management style, including communication tools and timeliness.
We do a weekly call with the team, we also constantly communicate on emails often
What did you find most impressive or unique about this company?
They are very proactive, if the campaign is not delivering the result we are trying to achieve they will recommend another alternative approach we can expolore.
Are there any areas for improvement or something they could have done differently?
Overall the experience is quite good with them.
RATINGS
5.0
Quality
5.0
Service & Deliverables
Schedule
5.0
On time / deadlines
Cost
4.0
Value / within estimates
Willing to Refer
5.0
NPS
Lead Generation for IT Solutions Provider
Cloud Consulting & SI
$10,000 to $49,999
Jan. - Apr. 2021
4.0
Quality
4.5
Schedule
5.0
Cost
3.5
Willing to Refer
4.0
"They were thorough and professional throughout the entire engagement."
May 4, 2021
Director of Sales & Marketing, IT Solutions Provider
Anudeep Parashar
Verified
Other industries
Singapore
11-50 Employees
Online Review
Verified
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.
The client submitted this review online.
BACKGROUND
Please describe your company and your position there.
I am heading the sales and marketing outreach for an integrated platform for e-commerce in the APAC region.
OPPORTUNITY / CHALLENGE
For what projects/services did your company hire Callbox?
Primarily for lead generation in the APAC region.
SOLUTION
How did you select this vendor and what were the deciding factors?
Evaluated the proposals and strengths of multiple vendors before shortlisting callbox.
Describe the project in detail and walk through the stages of the project.
Product orientation and training
Messaging and branding
Campaign efforts
LinkedIn outreach
Google Ad-words marketing
Weekly updates
Scheduling of appointments.
How many resources from the vendor's team worked with you, and what were their positions?
One CSM
One PM
Two writers
One main agent
One backup agent.
RESULTS & FEEDBACK
Can you share any outcomes from the project that demonstrate progress or success?
The outreach led to a total of 63 leads of which 43 were MQL's and remaining were appointments.
How effective was the workflow between your team and theirs?
Very effective and efficient.
What did you find most impressive or unique about this company?
They were thorough and professional throughout the entire engagement.
Are there any areas for improvement or something they could have done differently?
Probably have more flexi pricing options.
RATINGS
4.0
Quality
4.5
Service & Deliverables
"As explained above, very thorough and professional throughout the entire engagement."
Schedule
5.0
On time / deadlines
Cost
3.5
Value / within estimates
Willing to Refer
4.0
NPS
Lead Generation for Portable Air Purifier Company
Call Center Services
Less than $10,000
Feb. 2021 - Ongoing
4.0
Quality
3.5
Schedule
4.0
Cost
4.0
Willing to Refer
4.0
"They are doing what we expect them to do."
Mar 11, 2021
Director of B2B Sales, Alen Inc
Anonymous
Verified
Other industries
Austin, Texas
51-200 Employees
Online Review
Verified
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.
The client submitted this review online.
BACKGROUND
Please describe your company and your position there.
Alen is a portable air purifier and filter company looking to expand our business sales division.
OPPORTUNITY / CHALLENGE
For what projects/services did your company hire Callbox?
We hired Callbox to help us with lead generation in the education, corporate and healthcare verticals.
What were your goals for this project?
Obtain leads and contacts to sell more purifiers
SOLUTION
How did you select Callbox?
Our CRO, Tony Tamburrano had worked with Callbox previously at a different company.
Describe the project in detail.
Callbox sources leads through traditional telephone and email outreach as well as social media. They provide weekly updates on MQLs and Appointment setting.
What was the team composition?
Callbox has provided Alen with 1 lead and 2 people on outreach
RESULTS & FEEDBACK
Can you share any outcomes from the project that demonstrate progress or success?
It is too early to determine success through metrics but Cllbox has been adaptable, proactive and enthusiastic thus far.
How effective was the workflow between your team and theirs?
Their tools, frequency of communication and feedback has been very helpful to the Alen team.
What did you find most impressive about this company?
Their tools, frequency of communication and feedback has been very helpful to the Alen team.
Are there any areas for improvement?
As long as Callbox continues to focus on quality of the leads, they are doing what we expect them to do.
RATINGS
4.0
Quality
3.5
Service & Deliverables
Schedule
4.0
On time / deadlines
Cost
4.0
Value / within estimates
Willing to Refer
4.0
NPS
Lead Generation for Cybersecurity Firm
Other IT Consulting and SI
$10,000 to $49,999
Jan. 2021 - Ongoing
4.0
Quality
4.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0
"They were really responsive and courteous to my requests."
Feb 23, 2021
CEO, Firebird Security and Compliance Consulting LLC
Wayne Salas
Verified
Other industries
Phoenix, Arizona
1-10 Employees
Online Review
Verified
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.
The client submitted this review online.
BACKGROUND
Please describe your company and your position there.
CEO and Expert Cyber Security Consultant Cyber Security Assessments, Audits and vCISO Advisory Services.
OPPORTUNITY / CHALLENGE
For what projects/services did your company hire Callbox?
All my Cyber Security Services
What were your goals for this project?
Multiple Projects to gain business customers for my services.
SOLUTION
How did you select Callbox?
Pricing, and the ability to get the initial clients calls into my calendar.
Describe the project in detail.
Projects included consulting with companies about their Cyber Security Needs in reference to potential Audits, Assessments or Advisory services for the regulations and standards which includes FFIEC, NCUA, PCI, HIPAA, MURA, NIST CSF, NIST SP800:53 etc.
What was the team composition?
I am a startup at this time.
RESULTS & FEEDBACK
Can you share any outcomes from the project that demonstrate progress or success?
Callbox was able to get me a pipeline during a pandemic and filled my calendar with at a minimum of 15 clients a month.
How effective was the workflow between your team and theirs?
It was very good and communicative between the my company which if Firebird Security and Compliance Consulting LLC and Callbox.
What did you find most impressive about this company?
They were really responsive and courteous to my requests.
Are there any areas for improvement?
They just needed more experience in understanding about Cyber Security in General to get a better grasp on what type of clients I'm looking for, but they did get going pretty good once they started getting a better grasp on what my services I'm selling.
RATINGS
4.0
"Great."
Quality
4.0
Service & Deliverables
"Needed a little more experience in selling Cyber Security Services."
Schedule
5.0
On time / deadlines
"Callbox was always available for me."
Cost
5.0
Value / within estimates
"Great for the service that they provide."
Willing to Refer
5.0
NPS
"They did a great job for me.
Telemarketing Services for Facilities Services Company
Call Center Services
Less than $10,000
Sep. 2020 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0
"Our assigned account manager is very thorough and responsive."
Feb 19, 2021
Senior Sales Executive, Facilities Services Company
Shayaan Ali
Verified
Business services
Canada
1-10 Employees
Online Review
Verified
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.
The client submitted this review online.
BACKGROUND
Please describe your company and your position there.
Facility Services - Senior Sales Executive
OPPORTUNITY / CHALLENGE
For what projects/services did your company hire Callbox?
We hired callbox for providing us with lead generation and have been using them for 10+ years now. Very friendly and great people to work with!
What were your goals for this project?
To generate leads for our set out campaign.
SOLUTION
How did you select Callbox?
Our other offices have been using callbox for years and recommended us.
Describe the project in detail.
They dial for us on a daily basis and provide myself and my partner with appointments within out industry with key decision makers. Their leads are very well qualified and we end up closing them at a high rate.
What was the team composition?
We have dedicated callers on our campaign assigned to us who understand our needs.
RESULTS & FEEDBACK
Can you share any outcomes from the project that demonstrate progress or success?
We close their leads at very high closing average. Well qualified and generated leads.
How effective was the workflow between your team and theirs?
Our assigned account manager is very thorough and responsive. If e are encountering any issues, they resolve it right away.
What did you find most impressive about this company?
The open communication is great.
Are there any areas for improvement?
Cant think if any!
RATINGS
5.0
Quality
5.0
Service & Deliverables
Schedule
5.0
On time / deadlines
Cost
5.0
Value / within estimates
Willing to Refer
5.0
NPS
Showing 101-110 of
123 Reviews
Premier Verified means Clutch independently confirmed Callbox is a legally registered business, financially sound (Creditsafe: Low Risk), and backed by 116 verified client reviews averaging 4.6 stars.
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