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 offers competitive pricing for lead generation services, with clients noting good value for cost. Engagements range from $12,000 to $80,000 annually, with flexible payment options. Clients appreciate the quality of leads generated and the effective communication throughout projects.
Clients appreciate Callbox's dedication to achieving business objectives and their proactive approach to overcoming challenges. Their commitment to client success is evident in their willingness to go above and beyond.
Effective Multichannel Marketing
Callbox employs a comprehensive multichannel marketing strategy, including email, social media, and telemarketing. This approach has been effective in generating awareness, engaging prospects, and driving conversions.
Proficiency in Lead Generation
Callbox's lead generation services have consistently enabled clients to increase their sales pipeline, generate qualified leads, and set appointments. Clients across various industries have benefited from their ability to connect with decision-makers and convert leads into opportunities.
Positive Client Relationships
Callbox fosters strong client relationships through effective communication, understanding client needs, and delivering personalized services. Their professional and courteous demeanor is consistently highlighted by clients.
Need for Improved Reporting
Some clients have noted that Callbox could enhance their reporting capabilities by providing more detailed insights and analysis. This would help clients better understand campaign performance and make informed decisions.
High Client Satisfaction
Overall, clients express high satisfaction with Callbox's services, noting their ability to deliver results, enhance brand awareness, and provide valuable lead generation support. Many clients have renewed their contracts due to positive outcomes.
"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
Telemarketing Services for Transportation Company
Call Center Services
Less than $10,000
Oct. 2016 - Ongoing
5.0
Quality
4.5
Schedule
5.0
Cost
4.5
Willing to Refer
4.5
"Their service saves us money."
Nov 2, 2017
Senior IT Manager, Transportation Company
Anonymous
Other industries
Elk Grove Village, Illinois
501-1,000 Employees
Survey Response
OPPORTUNITY / CHALLENGE
Why does your firm need outbound services? Did you previously handle these needs in-house?
We have a many calls to take care of.
What was the volume of outbound calls your company was handling per day?
We have a high volume of calls.
What challenge were you trying to address with the service provider?
Our goals was for Callbox to receive calls.
SOLUTION
What was the scope of the service provider's involvement?
They provide telemarketing services.
Could you describe the service provider's pricing structure and how they billed you?
They bill us monthly.
How did you come to work with this service provider?
They were recommended by a friend.
How would you assess the service provider's ability to conduct outbound sales calls, generate new business, and handle customer issues?
They meet our expectations.
How much time, in hours, does this service provider save you each month?
I don't know the specific number of hours.
How much money does this service provider save you each month?
$100 every month.
RESULTS & FEEDBACK
What takeaways and measures of success can you share about working with this service provider?
Their service saves us money.
What are the service provider's strengths?
Their service is their best strength.
How can the service provider improve?
There is no need to improve.
How long has your company been working with this service provider?
We began October 2016, and it's ongoing.
How much money do you spend annually with this service provider?
$5,000 to $9,999.
RATINGS
5.0
Quality
4.5
Service & Deliverables
Schedule
5.0
On time / deadlines
Cost
4.5
Value / within estimates
Willing to Refer
4.5
NPS
Appointment Scheduling for IT Company
Call Center Services
Less than $10,000
Jan. 2017 - Ongoing
4.0
Quality
4.0
Schedule
4.5
Cost
4.0
Willing to Refer
4.5
"They are a great solution to my company's needs."
Aug 16, 2017
IT Manager, Information Technology Company
Anonymous
Other industries
Salem, Oregon
5,001-10,000 Employees
Survey Response
OPPORTUNITY / CHALLENGE
Why does your firm need outbound services? Did you use to handle these needs in-house?
For when our employees need to follow-up with customers, in order to obtain information to update in our records.
How many outbound calls did your company handle every day?
About 300-500 outbound calls per day.
What challenge were you trying to address with the service provider?
To have more organized data with clearer classification methods - improving our administrative work.
SOLUTION
What was the scope of the service provider's involvement?
Classification concerning if the calls were handled on time, by which employee, and if the employee provided satisfactory service to the customer and if the customer answered properly.
Could you describe the service provider's pricing structure and how they billed you?
It was a package deal, according a price by number of calls handled.
How did you come to work with this service provider?
We found them through an online search.
How would you assess the service provider's abilities to conduct outbound sales calls, generate new business, and handle customer issues?
They answer quickly and overall they are a great solution to my company's needs.
How much time and money does this service provider save you each month?
I don't think I can provide exact numbers, but they do save us a lot of money and more importantly, a huge amount of administrative work.
RESULTS & FEEDBACK
What takeaways and measures of success can you share about working with this service provider?
The pros: they provide great service, are useful, and fall at a good price compared to other vendors. They are easy to do business with and the deals are credible. The cons: sometimes their data experiences failure, but that seldom happens.
What are the service provider's strengths?
The quality of their service, the time they save us, and the affordable prices they have.
What areas can the service provider improve?
Optimizing the time of their responses. Its not like its bad, but I think it could be a bit quicker.
How long has your company been working with this service provider?
We began January, 2017 and are ongoing.
How much money do you spend annually with this service provider?
Less than $1,000.
RATINGS
4.0
Quality
4.0
Service & Deliverables
Schedule
4.5
On time / deadlines
Cost
4.0
Value / within estimates
Willing to Refer
4.5
NPS
Appointment Setting for Consumer Products Company
Call Center Services
Less than $10,000
Jan. 2015 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0
"They improved our revenue."
Aug 12, 2017
Senior Manager, Consumer Products Company
Anonymous
Other industries
Brockton, Massachusetts
5,001-10,000 Employees
Survey Response
OPPORTUNITY / CHALLENGE
Why does your firm need outbound services? Did you use to handle these needs in-house?
No, we didn't handle it in-house.
How many outbound calls did your company handle every day?
The volume was about 50%.
What challenge were you trying to address with the service provider?
We wanted to make our job more organized.
SOLUTION
What was the scope of the service provider's involvement?
They make our job of handling appointments easier.
Could you describe the service provider's pricing structure and how they billed you?
I believe it's a package deal.
How did you come to work with this service provider?
I found them using online research.
How would you assess the service provider's abilities to conduct outbound sales calls, generate new business, and handle customer issues?
It works great.
How much time and money does this service provider save you each month?
Perhaps $1,000.
RESULTS & FEEDBACK
What takeaways and measures of success can you share about working with this service provider?
They improved our revenue.
What are the service provider's strengths?
They are more organized.
What areas can the service provider improve?
There is nothing.
How long has your company been working with this service provider?
We have been with them for 2 years.
How much money do you spend annually with this service provider?
It's $1,000 to $4,999 per year.
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 121-128 of
128 Reviews
Premier Verified means Clutch independently confirmed Callbox is a legally registered business, financially sound (Creditsafe: Low Risk), and backed by 121 verified client reviews averaging 4.6 stars.
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