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.
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.
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.
Challenges with Non-English Markets
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.
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.
Positive Client Relationships
Callbox maintains strong client relationships through regular communication, responsiveness, and a commitment to client success. This fosters trust and long-term partnerships with their clients.
Project Management and Communication
Callbox's project management skills are frequently commended. Clients value their structured processes, regular updates, and the ability to maintain clear communication channels, ensuring project alignment and timely delivery.
Lead Generation Services for Communications Provider
Advertising
Confidential
June 2020 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
4.5
Willing to Refer
5.0
"They frequently ask for our feedback to customize and optimize our campaigns."
Feb 15, 2021
Account Management, USA Digital
Matt Estes
Verified
Telecommunications
Oklahoma City, Oklahoma
11-50 Employees
Online Review
Verified
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.
The client submitted this review online.
BACKGROUND
Please describe your company and your position there.
USA Digital Communications is a nationwide communications provider for data and voice. I lead our Account Management.
OPPORTUNITY / CHALLENGE
For what projects/services did your company hire Callbox?
Qualified lead generation.
What were your goals for this project?
Increase our qualified leads.
SOLUTION
How did you select Callbox?
Our review determined they were the most qualified to do what we were looking for.
Describe the scope of their work in detail.
They provide their own lists of potential customers and contact customers on our behalf via phone, email, and social media campaigns.
What was the team composition?
There are five to six people involved depending on work required at the time. Their roles range from overall Campaign Management, Social Media and Email Management, and callers.
RESULTS & FEEDBACK
Can you share any outcomes from the project that demonstrate progress or success?
We have been pleased with the number of qualified leads that they produce on an ongoing basis.
How effective was the workflow between your team and theirs?
Very effective. We have weekly campaign status calls and they are available by email anytime we need them.
What did you find most impressive about this company?
They frequently ask for our feedback to customize and optimize our campaigns. Additionally, they provide experience-based recommendations that have repeatedly added value.
Are there any areas for improvement?
None that come to mind.
RATINGS
5.0
Quality
5.0
Service & Deliverables
Schedule
5.0
On time / deadlines
Cost
4.5
Value / within estimates
Willing to Refer
5.0
NPS
Customer Outreach & Lead Generation for AI Software Dev Co
Other Digital Marketing
Confidential
Oct. 2020 - Ongoing
4.5
Quality
5.0
Schedule
3.5
Cost
5.0
Willing to Refer
5.0
"We are very pleased with how the team performs."
Feb 12, 2021
CEO & Co-Founder, LeapAnalysis
Anonymous
Verified
Other industries
Melbourne, Florida
11-50 Employees
Online Review
Verified
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
The client submitted this review online.
BACKGROUND
Please describe your company and your position there.
Our company builds AI software for enterprise level customers. I am CEO & Co-founder of the company
OPPORTUNITY / CHALLENGE
For what projects/services did your company hire Callbox?
Outreach to customers and developing qualified marketing/sales leads.
What were your goals for this project?
To generate 3-5 customers per year beyond our internal outreach.
SOLUTION
How did you select Callbox?
we found you on-line and had an initial call with a sales person.
Describe the scope of their work in detail.
We set up a 6 month contract, designed some call and outreach messaging and then over time refined those messages with Eunice and her team.
What was the team composition?
Eunice, Rey and some others who work behind the scenes.
RESULTS & FEEDBACK
Can you share any outcomes from the project that demonstrate progress or success?
CallBox has been very good about getting us connected to people in the financial area where we lacked connections. We need the team to also make in-roads into other areas such as Life Sciences where we currently work and have customers. We receive normally a couple of leads per week - though getting people on meetings afterward is still hard and as of yet, we have no actual conversions.
How effective was the workflow between your team and theirs?
The workflow is very good. Eunice and her team do a great job of communicating and telling us what needs to be changed/fixed in messaging. We are very pleased with how the team performs.
What did you find most impressive about this company?
How fast you work and for a reasonable price point.
Are there any areas for improvement?
Just helping us with the next stages now to actually convert customers.
RATINGS
4.5
"Great staff, hard workers, great communication"
Quality
5.0
Service & Deliverables
"Very good people, friendly, professional and results-drivenal and"
Schedule
3.5
On time / deadlines
"A lot of meetings with customers get moved and they are hard to get pinned down for demos so far."
Cost
5.0
Value / within estimates
"Very good work for the price"
Willing to Refer
5.0
NPS
"I already have recommended you to people
Lead Generation for Cleaning Services Provider
Other Digital Marketing
Less than $10,000
Jan. 2020 - Jan. 2021
4.5
Quality
4.0
Schedule
4.5
Cost
3.0
Willing to Refer
4.0
"Their customer service is impressive."
Feb 11, 2021
Sales Representative, Anago Cleaning Systems
Jesus Soto
Verified
Business services
Pompano Beach, Florida
1-10 Employees
Online Review
Verified
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.
The client submitted this review online.
BACKGROUND
Please describe your company and your position there.
Anago of the Bay Area Sales
OPPORTUNITY / CHALLENGE
For what projects/services did your company hire Callbox?
Lead Genration
What were your goals for this project?
Increase leads
SOLUTION
How did you select Callbox?
Research online
Describe the scope of their work in detail.
Generating leads
What was the team composition?
Not sure
RESULTS & FEEDBACK
Can you share any outcomes from the project that demonstrate progress or success?
Effective when it comes to generating leads
How effective was the workflow between your team and theirs?
Good communication with our team.
What did you find most impressive about this company?
Their customer service is impressive.
Are there any areas for improvement?
Get more leads
RATINGS
4.5
Quality
4.0
Service & Deliverables
Schedule
4.5
On time / deadlines
Cost
3.0
Value / within estimates
Willing to Refer
4.0
NPS
Marketing & Lead Gen for Computer & Network Security Firm
AdvertisingCall Center Services
$10,000 to $49,999
Sep. 2020 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
4.0
Willing to Refer
5.0
"Their attention to detail and process is very impressive."
Feb 8, 2021
President, Blue Reef Networks
Jim Henderson
Verified
Other industries
Dallas, Texas
1-10 Employees
Online Review
Verified
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.
The client submitted this review online.
BACKGROUND
Please describe your company and your position there.
Blue Reef Networks is a managed service provider for data connections, hosted phone, cyber security and IT infrastructure. I am the President of the company.
OPPORTUNITY / CHALLENGE
For what projects/services did your company hire Callbox?
We hired Callbox to implement a marketing campaign to target small to mid-size companies in the Texas and Oklahoma region. This campaign includes social media, email and calls to potential customers.
What were your goals for this project?
The goals were to get appointments for web/conference calls and leads for our services.
SOLUTION
How did you select Callbox?
We researched a few companies and felt that Callbox had the experience and success to help us get the appointments we needed.
Describe the project in detail.
The project consisted of preparing call scripts, email templates, social media posts and a marketing brochure for the campaign. Callbox provides the prospect list, a detailed pipeline of calls and leads through Hubspot.
What was the team composition?
They have a great team for our campaign. Everyone has their role and it's very consistent.
RESULTS & FEEDBACK
Can you share any outcomes from the project that demonstrate progress or success?
We have had a number of great conversations with prospects and are working on a few leads with interested decision makers.
How effective was the workflow between your team and theirs?
We meet weekly and are given updates on their progress. They are very detailed oriented and provide great feedback.
What did you find most impressive about this company?
Their attention to detail and process is very impressive.
Are there any areas for improvement?
Just making sure the prospect is seriously interested in speaking with us and keeping the meeting.
RATINGS
5.0
"I feel the value we are getting is above par."
Quality
5.0
Service & Deliverables
"They are consistent with the details."
Schedule
5.0
On time / deadlines
"They have been very good at getting meetings."
Cost
4.0
Value / within estimates
"Comparing the cost to hiring an individual to make calls, I would say it's affordable."
Willing to Refer
5.0
NPS
"Very likely!
Advertising & Marketing for Janitorial & Housekeeping Comp
Advertising
Less than $10,000
Sep. 2020 - Ongoing
4.0
Quality
4.0
Schedule
4.0
Cost
4.0
Willing to Refer
4.0
"There is always somebody in the other line to help and sort things out."
Feb 8, 2021
Sales Director, Janitorial & Housekeeping Company
Greyven Landergren
Verified
Arts, entertainment & music
Port Saint Lucie, Florida
51-200 Employees
Online Review
Verified
A janitorial, building maintenance, and housekeeping company hired Callbox to setup a person-to-person appointment to close more potential buyers.
Callbox continues to meet and close new accounts. The team's workflow is good.
The client submitted this review online.
BACKGROUND
Please describe your company and your position there.
I'm a sales manager , we sell janitorial and building maintenance services, housekeeping as well.
OPPORTUNITY / CHALLENGE
For what projects/services did your company hire Callbox?
We hire Callbox to set up person to person appointments for us to close the potential buyer.
What were your goals for this project?
Close more accounts.
SOLUTION
How did you select Callbox?
Online research
Describe the scope of their work in detail.
They call business interested in janitorial services, they talk about our company and cleaning services, then they try set a person to person appointment with the decision maker and one of our sales representative in efforts to provide a free proposal and finally close the sale.
What was the team composition?
Great communication, always willing to accommodate our requests.
RESULTS & FEEDBACK
Can you share any outcomes from the project that demonstrate progress or success?
Even with Covid, we were able to meet and close new accounts.
How effective was the workflow between your team and theirs?
I think workflow has always been good.
What did you find most impressive about this company?
There is always somebody in the other line to help and sort things out.
Are there any areas for improvement?
Sometimes scheduling appointments 1 or 2 hours apart when there is a great distance in between.
RATINGS
4.0
Quality
4.0
Service & Deliverables
"Serious company with great work ethics"
Schedule
4.0
On time / deadlines
Cost
4.0
Value / within estimates
Willing to Refer
4.0
NPS
Tele-Sales Services for Healthcare IT Startup
Call Center Services
$10,000 to $49,999
Jan. - Sep. 2018
4.5
Quality
4.5
Schedule
5.0
Cost
5.0
Willing to Refer
5.0
"Callbox provided a team of impressive support people that worked with us on a routine basis."
Jan 29, 2021
Co-Founder & CEO, Twiage
John Hui
Verified
Other industries
New York City, New York
11-50 Employees
Online Review
Verified
Callbox provided tele-sales services for a healthcare IT startup.
Callbox was able to schedule 3-5 demos for the client weekly, which was great metrics in their respective industry. The team's management is supportive.
The client submitted this review online.
BACKGROUND
Please describe your company and your position there.
I am the Founder & CEO of a healthcare IT startup company.
OPPORTUNITY / CHALLENGE
For what projects/services did your company hire Callbox?
We hired Callbox to provide tele-sales services.
What were your goals for this project?
The expectation was to launch tele-sales campaigns to schedule web sales demos for our sales executives.
SOLUTION
How did you select Callbox?
We evaluated a number of outsourced tele-sales providers. CallBox was one of them recommended by an industry peer. Its pricing structure seems to make the most sense.
Describe the project in detail.
CallBox provided tele-sales reps for my company to interview and select. It also provided management services and reports to help us monitor sales rep's productivities. It also provided sales leads and email marketing cammpaigns.
What was the team composition?
Two tele-sales reps One sales coordinator (included) One account manager (included)
RESULTS & FEEDBACK
Can you share any outcomes from the project that demonstrate progress or success?
The sales reps were able to schedule 3-5 sales demos per week, which was pretty good for our industry.
How effective was the workflow between your team and theirs?
It has been a continous improvement in our workflow, which took us a couple of months to fully sync. Callbox's account management team was quite supportive.
What did you find most impressive about this company?
Callbox provided a team of impressive support people that worked with us on a routine basis. We were very involved in the sales rep selecting process.
Are there any areas for improvement?
As a client, we still need to be responsible for sales training to the reps to speed. The email campaigns can also be improved.
RATINGS
4.5
Quality
4.5
Service & Deliverables
Schedule
5.0
On time / deadlines
Cost
5.0
Value / within estimates
Willing to Refer
5.0
NPS
Systems Development for IoT GPS Tracking Service
IT Staff Augmentation
$10,000 to $49,999
Jan. 2016 - Sep. 2019
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0
“They do what they say they will, and they do it well.”
Aug 23, 2019
CEO, GPS Service
Anonymous
Verified
Other industries
Phoenix, Arizona
11-50 Employees
Online Review
Verified
Callbox provided development services, working on a series of cellular-based systems.
The team delivered what they were contracted to, producing excellent systems and allowing the company to execute their services. They managed the work well and always achieved good results.
The client submitted this review online.
BACKGROUND
Please describe your company and your position there.
I’m the CEO of a company offering Wi-Fi GPS fleet tracking.
OPPORTUNITY / CHALLENGE
For what projects/services did your company hire Callbox?
We’re a small company, and we needed help with many cellular-based systems.
What were your goals for this project?
To increase our leads, and to have them buy and test our product.
SOLUTION
How did you select this vendor?
We’ve tried many different vendors over the past 30 years.
Describe the project in detail.
They developed several cellular-based systems.
What was the team composition?
We worked with one person.
RESULTS & FEEDBACK
Can you share any outcomes from the project that demonstrate progress or success?
They’ve done a great job over the past few years.
How effective was the workflow between your team and theirs?
The team we have is awesome.
What did you find most impressive about this company?
They do what they say they will, and they do it well.
Are there any areas for improvement?
No.
RATINGS
5.0
"They're a great team."
Quality
5.0
Service & Deliverables
Schedule
5.0
On time / deadlines
Cost
5.0
Value / within estimates
Willing to Refer
5.0
NPS
"I have twice already.
Lead Generation for Administration Department
Call Center Services
Less than $10,000
Jan. 2016 - Ongoing
4.5
Quality
5.0
Schedule
4.5
Cost
5.0
Willing to Refer
5.0
"They save us several hours per day."
Nov 2, 2017
Adminstration Department Owner
Anonymous
Other industries
Miami, Florida
1-10 Employees
Survey Response
OPPORTUNITY / CHALLENGE
Why does your firm need outbound services? Did you previously handle these needs in-house?
My needs are consistent, their services are just more efficient.
What was the volume of outbound calls your company was handling per day?
About 20 calls.
What challenge were you trying to address with the service provider?
To have better service.
SOLUTION
What was the scope of the service provider's involvement?
To perform reliable service.
Could you describe the service provider's pricing structure and how they billed you?
It is a monthly bill.
How did you come to work with this service provider?
Through a reference and after conducting an online search.
How would you assess the service provider's ability to conduct outbound sales calls, generate new business, and handle customer issues?
They are very effective.
How much time, in hours, does this service provider save you each month?
It saves us several hours per day.
How much money does this service provider save you each month?
I'm not sure.
RESULTS & FEEDBACK
What takeaways and measures of success can you share about working with this service provider?
They are very good and reliable.
What are the service provider's strengths?
They are efficient.
How can the service provider improve?
I do not know.
How long has your company been working with this service provider?
We've been working together for 1 year.
How much money do you spend annually with this service provider?
$1,000 to $4,999.
RATINGS
4.5
Quality
5.0
Service & Deliverables
Schedule
4.5
On time / deadlines
Cost
5.0
Value / within estimates
Willing to Refer
5.0
NPS
Telemarketing & Lead Generation for Advertising Company
Call Center Services
Less than $10,000
Dec. 2013 - Ongoing
4.5
Quality
4.0
Schedule
4.5
Cost
4.5
Willing to Refer
4.5
"[Their service] is really helpful."
Nov 2, 2017
Marketing Manager, Advertising Company
Anonymous
Advertising & marketing
San Diego, California
11-50 Employees
Survey Response
OPPORTUNITY / CHALLENGE
Why does your firm need outbound services? Did you previously handle these needs in-house?
Yes, we used to handle these needs in-house.
What was the volume of outbound calls your company was handling per day?
85 calls.
What challenge were you trying to address with the service provider?
To have help with our calls.
SOLUTION
What was the scope of the service provider's involvement?
They provide telemarketing and lead generation services.
Could you describe the service provider's pricing structure and how they billed you?
Their callbox is compatible with VHF [Very High Frequency] or UHF [Ultra High Frequency] channels. The monthly cost is $50.
How did you come to work with this service provider?
We found them on the internet.
How would you assess the service provider's ability to conduct outbound sales calls, generate new business, and handle customer issues?
They are great at recording whispers and real-time reporting. They also do online, TV, and radio ads.
How much time, in hours, does this service provider save you each month?
40 hours.
How much money does this service provider save you each month?
$50 per month.
RESULTS & FEEDBACK
What takeaways and measures of success can you share about working with this service provider?
It is really helpful for my house and company where I work.
What are the service provider's strengths?
Their strongest point is their infinity call tracking.
How can the service provider improve?
Nothing. Their service is perfect for me.
How long has your company been working with this service provider?
We started December 2013, and it's ongoing.
How much money do you spend annually with this service provider?
Less than $1,000.
RATINGS
4.5
Quality
4.0
Service & Deliverables
Schedule
4.5
On time / deadlines
Cost
4.5
Value / within estimates
Willing to Refer
4.5
NPS
Appointment Setting for Business Service
Call Center Services
Less than $10,000
Jan. 2014 - Ongoing
4.5
Quality
4.5
Schedule
4.5
Cost
4.5
Willing to Refer
4.5
"Their service is very on point and easy to use."
Nov 2, 2017
CEO, Business Service
Anonymous
Other industries
Tampa, Florida
51-200 Employees
Survey Response
OPPORTUNITY / CHALLENGE
Why does your firm need outbound services? Did you previously handle these needs in-house?
The amount of appointment setting is very overwhelming and we needed software to help us.
What was the volume of outbound calls your company was handling per day?
Over 200 calls.
What challenge were you trying to address with the service provider?
Our goals were to make appointment setting easier and more accurate.
SOLUTION
What was the scope of the service provider's involvement?
They provide us with more accurate appointment setting and the comfort of knowing that everything is being stored as it should with little to no error.
Could you describe the service provider's pricing structure and how they billed you?
We are billed quarterly.
How did you come to work with this service provider?
They came as a reference from another business owner who had nothing but great things to say about them.
How would you assess the service provider's ability to conduct outbound sales calls, generate new business, and handle customer issues?
Their service is very on point and easy to use.
How much time, in hours, does this service provider save you each month?
Around 30 hours each month.
How much money does this service provider save you each month?
Around $200.
RESULTS & FEEDBACK
What takeaways and measures of success can you share about working with this service provider?
It's all pros for me. I haven't encountered anything negative with this service.
What are the service provider's strengths?
The best part is knowing the program is working as it should.
How can the service provider improve?
They can improve on nothing at all. I'm very satisfied.
How long has your company been working with this service provider?
We began January 2014, and it's ongoing.
How much money do you spend annually with this service provider?
$5,000 to $9,999.
RATINGS
4.5
Quality
4.5
Service & Deliverables
Schedule
4.5
On time / deadlines
Cost
4.5
Value / within estimates
Willing to Refer
4.5
NPS
Showing 111-120 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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