Top Outbound Call Centers in Bulgaria

Ratings Updated: May 13, 2026

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24 Companies

Country: Bulgaria

List of the Top Bulgaria Outbound Call Center Providers

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MarKam Solutions

5.0 9 reviews

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$1,000+

< $25 / hr

50 - 249

Sofia, Bulgaria

Services provided

30% Call Center Services

20% Customer Service Outsourcing

20% IT Managed Services +2 services

20% Sales Outsourcing

10% Back Office Outsourcing

MarKam Solutions is a versatile outsourcing provider specializing in technical support, sales, operations, and customer service. Across multiple reviews, clients commend their professional management, alignment with company values, and ability to meet budget constraints. With over 90% positive feedback, MarKam Solutions is praised for their adaptability, responsiveness, and the strategic impact on metrics such as customer satisfaction and sales growth.

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Reviews mention Timely
Overall feedback regarding the timeliness of MarKam Solutions is overwhelmingly positive. Clients consistently noted that all deliverables were met on time, with one client stating, "They managed the project efficiently, delivering all tasks and deliverables on time." Another highlighted their "extreme promptness" and ability to exceed expectations. Furthermore, a third client emphasized that every deliverable was met in a "timely and professional manner," reinforcing the company's reliability in meeting deadlines.

Call Center Services for Furniture Manufacturer

5.0 Nov 1, 2024

All project deliverables were met in professional and timely manner.
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Sales & Customer Service Outsourcing for Transportation Co

5.0 Sep 9, 2024

Every deliverable was met on a timely and professional manner.
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Call Center Services for Auto Transport Broker

5.0 Mar 19, 2025

MarKam Solutions have exceeded all expectations in regards to speed and quality of delivery. They have also been incredibly decisive when things aren't working.
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Back Office Outsourcing for Creative Agency

5.0 Nov 5, 2025

They managed the project efficiently, delivering all tasks and deliverables on time. Communication was clear and proactive, with regular progress updates and performance reports. Their structured approach made coordination easy and ensured deadlines were consistently met.
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Industry Experience

MarKam Solutions has demonstrated expertise across various sectors, including Advertising & Marketing, Supply Chain & Logistics, Manufacturing, Transportation, and Information Technology. Clients commend their ability to enhance operational efficiency, boost sales, and improve customer satisfaction. The overall sentiment is highly positive, particularly within Supply Chain & Logistics, where they provided significant cost reductions and revenue growth. Their strengths lie in adaptability, effective communication, and a strong understanding of industry-specific needs, making them a suitable partner across these diverse fields.
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Advertising & marketing Information technology Supply Chain, Logistics, and Transport Manufacturing Transportation

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Average Project Cost Breakdown

$50,000 to $199,999 (3) $10,000 to $49,000 (1) $200,000 to $999,999 (1)

What Clients Have Said
Clients consistently praised MarKam Solutions for their competitive pricing and excellent value for money. One client highlighted that their pricing fit the budget while providing a 'good value for cost.' Another noted a 35% decrease in labor costs while meeting sales goals, emphasizing affordability without sacrificing quality. Overall, feedback reflects strong satisfaction with cost-effectiveness, suggesting that MarKam Solutions delivers substantial value relative to their fees.
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United States (4) Bulgaria (3) England (1)

This provider is fluent in 10 languages:

Arabic

English

Dutch

German

Romanian

Spanish

Swedish

Russian

Portuguese

Italian

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Mercatus

4.8 22 reviews
Verified

$5,000+

< $25 / hr

50 - 249

Sofia, Bulgaria

Services provided

50% Customer Service Outsourcing

20% Sales Outsourcing

10% Back Office Outsourcing +2 services

10% Call Center Services

10% IT Staff Augmentation

Mercatus is a lead generation and outreach company offering services such as LinkedIn campaigns, cold calling, and email outreach to increase client visibility and generate business leads. Feedback from clients is generally positive, with 90% highlighting impressive project management, open communication, and effective campaign execution. However, 20% noted challenges in expanding market reach, suggesting areas for improvement in targeting specific industries and markets.

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Reviews mention Detail-oriented
Clients have noted Mercatus's detail-oriented approach, particularly in managing cold call campaigns. One client praised the cold caller for her coherence and structured data presentation, emphasizing its usefulness. The team maintained meticulous records on Google Sheets and provided timely updates. However, there were challenges with the LinkedIn campaign, where targeting issues led to confusion, highlighting the need for improved attention to detail in outreach strategies. Overall, feedback reflects a positive sentiment regarding their organizational skills and responsiveness.

Cold Calling & Lead Generation for Luxury Clothing Brand

4.0 Sep 26, 2024

Mercatus was very responsive and answered questions quickly whenever we had a problem. The team delivered all the information on time, and we had weekly scheduled meetings via Google Meet. Mercatus' planning was good, and tasks ran as planned within the timeframe. We shared documents in a Google Drive folder, and I updated the lead list weekly. The team kept a detailed follow-up of the leads they contacted on Google Sheets. The lady who did the cold calls was very coherent and detailed. All the information she provided and the way she structured data was very helpful.
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1 of 1 reviews is 5 stars

$50,000 – $199,999 avg. project cost

Reviewed 1 time in the past 6 months
Recent reviews of Mercatus highlight their effective lead generation and outreach campaigns, particularly in the Bulgarian market, resulting in numerous appointments and initial purchase orders. Clients appreciate their proactive communication and good project management practices. However, there are suggestions for improvement, specifically in expanding outreach efforts in the UK market. Overall, the sentiment is positive, with clients recommending clear communication for optimal results.
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Industry Experience

Mercatus demonstrates strong expertise in lead generation across diverse industries including Consulting, IT Services, Engineering, Retail, Software, Consumer Products, Construction, and Financial Services. Clients commend their effective communication, project management, and ability to adapt to specific industry needs. Overall sentiment is positive, with notable success in enhancing sales pipelines and client engagement, particularly in IT and Consulting. Potential clients in these sectors may find Mercatus to be a suitable partner for their lead generation and outreach initiatives.
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Information technology Consulting IT Services Engineering Retail Software Consumer Products Construction Manufacturing Human Resources Financial services

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Bulgaria (17) Romania (2) Estonia (1) Spain (1)

This provider is fluent in 24 languages:

English

Spanish

Arabic

Russian

Portuguese

German

French

Turkish

Italian

Polish

Ukrainian

Romanian

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This provider is available in 6 time zones:

Greenwich Mean Time (GMT)

Arabia Standard Time (AST)

Central European Time (CET)

Central Standard Time (CST)

Eastern European Time (EET)

Eastern Standard Time (EST)

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Lukanoff Consulting Ltd

4.9 8 reviews

$1,000+

$50 - $99 / hr

2 - 9

Sofia, Bulgaria

Services provided

30% Sales Outsourcing

20% Direct Marketing

20% Email Marketing +2 services

20% Marketing Strategy

10% Account-Based Marketing

Lukanoff Consulting Ltd is a marketing and lead generation consultancy known for developing effective strategies to help businesses grow. They are commended for professionalism, timely delivery, and personalized approaches. Across the reviews, 100% of clients express satisfaction with their services, with 83% highlighting their adaptability and strategic innovation. Lukanoff's efforts have notably generated significant new business opportunities and enhanced client sales processes.

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Reviews mention Creative
Clients have expressed high satisfaction with Lukanoff Consulting Ltd's creative strategies, noting their willingness to implement unconventional tactics tailored to niche markets. One client highlighted the agency's unique approaches and effective tracking of results, which generated over $40 million in business opportunities. Overall, the sentiment surrounding Lukanoff's creativity is overwhelmingly positive, with clients praising their attention to detail and ability to identify target market segments effectively.

Lead Generation for Private Equity Firm

5.0 Feb 24, 2022

Lukanoff is unafraid to implement unusual tactics to our market segment. Unlike other vendors, they offer unique strategies, and that works for us since we’re on a niche market. They’re also good at tracking results.
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Industry Experience

Lukanoff Consulting Ltd has demonstrated expertise across various industries including Financial Services, Software, Publishing, Advertising & Marketing, IT Services, and Business Services. Clients commend their ability to generate leads, implement effective marketing strategies, and provide personalized solutions. The feedback highlights strong project management, timely delivery, and a proactive approach, resulting in measurable success such as increased sales and new business opportunities. Overall, the sentiment is highly positive, indicating a strong fit for clients seeking growth in these sectors.
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Financial services Software Publishing Advertising & marketing IT Services Business services

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Average Project Cost Breakdown

$10,000 to $49,000 (3) Less than $10,000 (2)

What Clients Have Said
Clients consistently praise Lukanoff Consulting Ltd for their value and cost-effectiveness. One client noted a flexible pricing approach that accommodated their budget, while another highlighted a successful campaign resulting in €12,000 in revenue from a single lead. Overall, feedback indicates that Lukanoff Consulting not only meets but exceeds expectations in terms of deliverables and project management, providing significant returns on investment and high satisfaction with their services.
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Bulgaria (5) England (1)

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Hypergen

5.0 15 reviews

$5,000+

$50 - $99 / hr

10 - 49

Sofia, Bulgaria

Services provided

50% Sales Outsourcing

25% CRM Consulting and SI

15% Conversion Optimization +1 service

10% Email Marketing

Hypergen is a lead generation company specializing in cold email outreach and demand generation. The company consistently receives positive feedback, with 100% of reviewers praising their professionalism, responsiveness, and ability to deliver on promises. Themes across reviews include effective lead generation, impressive project management, and a collaborative approach, with clients reporting significant improvements in lead quality and conversion rates.

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Industry Experience

Hypergen has demonstrated expertise across several industries, notably Advertising & Marketing, Chemicals & Biotechnology, IT Services, Software, Real Estate, and Design. Clients praised their ability to generate qualified leads, effective cold email campaigns, and outstanding project management. Feedback highlights their professionalism, creativity, and responsiveness, with strong results in lead generation and sales. Overall, Hypergen is well-suited for businesses seeking impactful marketing strategies in these sectors.
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Advertising & marketing Chemicals & Biotechnology IT Services Software Design Business services Real estate Consumer Products

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Average Project Cost Breakdown

$10,000 to $49,000 (7) Less than $10,000 (4) $50,000 to $199,999 (2)

What Clients Have Said
Clients consistently commend Hypergen for their excellent value for money, highlighting the cost-effectiveness of their services. One client noted that Hypergen's pricing fit their budget while delivering significant results, including a 5x ROI. Another client emphasized the 'good value for cost' and the professional execution that exceeded expectations, resulting in over 300 qualified leads. Overall, sentiment is overwhelmingly positive, with many clients expressing satisfaction with the financial return relative to their investment.
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United States (8) Bulgaria (3) Canada (2) Israel (1) Romania (1)

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Sofia, Bulgaria

13 ulitsa "Veslets"
Sofia, Bulgaria 1000
16 - 20

+1 614 432 8647

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Euroccor JSC

4.5 1 review

$1,000+

$25 - $49 / hr

50 - 249

София, Bulgaria

Services provided

65% Call Center Services

15% Customer Service Outsourcing

10% Sales Outsourcing +1 service

10% Social Media Marketing

Euroccor JSC is a company specializing in listing quality checks. The reviews highlight their exceptional attention to detail and effective communication, with 100% positive feedback regarding time savings and workflow efficiency. While their speed of service is praised, there is a suggestion for further improvement in this area.

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Industry Experience

Euroccor JSC has demonstrated strong expertise in the Human Resources sector, specifically in the area of listing quality checks for online job boards. Feedback highlights their exceptional attention to detail and effective communication, which have led to significant time savings for clients. The overall sentiment in this industry is positive, indicating that Euroccor is a reliable partner for HR-related projects.
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Human Resources

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Average Project Cost Breakdown

What Clients Have Said
Clients have generally reported that Euroccor JSC offers good value for money, particularly noting their efficiency in saving time during projects. One client highlighted the company's attention to detail as exceptional, which contributes positively to their perceived value. However, there is a suggestion for improvement regarding the speed of service, indicating room for enhancement in their overall responsiveness. Overall, the sentiment reflects satisfaction with the cost relative to the quality of services provided.
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CXG Business Process Outsourcing

5.0 1 review

Undisclosed

Undisclosed

50 - 249

Sofia, Bulgaria

Services provided

25% Customer Service Outsourcing

24% Call Center Services

21% Back Office Outsourcing +2 services

15% Recruiting

15% Staffing

CXG Business Process Outsourcing is a specialized BPO company known for its efficiency in scaling teams to manage shared services, AI training, and data analytics. Reviews highlight their professionalism, effective collaboration, and adaptability, with a 100% positive feedback rate. Clients appreciate their ability to backfill positions swiftly, ensuring seamless service delivery.

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Industry Experience

CXG Business Process Outsourcing has demonstrated strong expertise in the Software industry, particularly in managed and shared services for a SAAS company in Business Spend Management. The firm's strengths include rapid resource ramp-up, effective team integration, and AI training for invoice processing and data classification. Clients express satisfaction with CXG's professionalism and collaborative approach, resulting in seamless service delivery and team support. Overall, CXG is well-suited for clients in the Software sector seeking agile and efficient outsourcing solutions.
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Software

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Average Project Cost Breakdown

$200,000 to $999,999 (1)

What Clients Have Said
Clients generally perceive CXG Business Process Outsourcing as offering strong value for money. One client noted that CXG's pricing was competitive compared to IT-focused service providers, highlighting their specialization in BPO. The swift ramp-up of resources and the ability to fill positions quickly were also praised, emphasizing the cost-effectiveness of their services. Overall, the sentiment reflects satisfaction with both the cost and the quality of service provided.
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Passion4Growth

4.9 9 reviews

$1,000+

$50 - $99 / hr

2 - 9

Breznik, Bulgaria

Services provided

50% Business Consulting

50% Sales Outsourcing

Passion4Growth is a lead generation and business development company that excels in enhancing client portfolios and expanding market presence through strategic partnerships and digital outreach. Their reviews reflect a 100% positive sentiment, highlighting effective communication, timely delivery, and proactive engagement. Approximately 83% of reviewers praised the company's innovative approach and personalized strategies, emphasizing their commitment to client success and growth.

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Reviews mention Exceeds expectations
The feedback from Mobica indicates that Passion4Growth exceeded expectations by significantly advancing their business development goals, achieving around 15 strategic meetings weekly and establishing a sales pipeline worth approximately 2.5 million Euros. The collaboration was marked by effective communication and timely delivery, with the client praising Passion4Growth's unique approach to partner engagement and their commitment to excellence, resulting in an overwhelmingly positive experience.

Business Development Consulting for IT & Telecommunications Company

5.0 Mar 29, 2024

Passion4Growth's unique approach to business development, particularly their ability to utilize a variety of digital channels for effective partner engagement, was highly impressive. Their strategic and personalized approach set them apart in the industry. Our experience with Passion4Growth was overwhelmingly positive, highlighting them as one of our most valued partners. The entire process was exemplary, showcasing their commitment to excellence and partnership success.
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1 of 2 reviews are 5 stars

Less than $10,000 avg. project cost

Reviewed 2 times in the past 6 months
Recent reviews of Passion4Growth highlight a positive overall sentiment, with clients praising their effective project management and clear communication. One client noted significant improvements in LinkedIn visibility and lead generation, while another appreciated their ability to onboard new customers despite product challenges. The founder's personal involvement and the team's energy were particularly commended. Suggestions for improvement included adapting strategies more dynamically during projects, indicating a willingness for growth and responsiveness to client needs.
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Industry Experience

Passion4Growth has demonstrated significant expertise across multiple industries, including Software, Advertising & Marketing, Telecommunications, IT Services, and Human Resources. Clients consistently praised their proactive communication, strategic approach, and ability to deliver measurable results, such as increased leads and client acquisition. The overall sentiment is positive, highlighting their strengths in lead generation and sales pipeline management, making them particularly suitable for companies seeking growth in tech-focused and service-oriented sectors.
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Advertising & marketing Telecommunications IT Services Human Resources Software Design

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Average Project Cost Breakdown

$10,000 to $49,000 (3) Less than $10,000 (2)

What Clients Have Said
Clients consistently highlight Passion4Growth's competitive pricing and strong value for money. For instance, one CEO noted that their pricing 'fit our budget' and provided 'good value for cost.' Another client emphasized the company's 'great culture fit' and the overall perception of high quality relative to their expenses. Overall, feedback reflects a positive sentiment regarding the affordability of services, with many clients expressing satisfaction with the outcomes achieved for the investment made.
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InfoSource Bulgaria Ltd

4.5 2 reviews

$1,000+

< $25 / hr

10 - 49

Sofia, Bulgaria

Services provided

20% Back Office Outsourcing

20% Call Center Services

20% Document Digitization & Management +3 services

20% Recruiting

10% Customer Service Outsourcing

10% Finance & Accounting Outsourcing (FAO)

InfoSource Bulgaria Ltd is a data management and analysis company specializing in extracting and structuring information from financial and executive reports. The company is consistently praised for its cost-effectiveness, attention to detail, and responsive project management. Approximately 100% of reviewers highlighted their satisfaction with the quality of service and customer-focused approach.

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Reviews mention Proactive
Clients have consistently praised InfoSource Bulgaria Ltd for their proactive approach to project management. One client highlighted their responsiveness, stating that the team was 'always very responsive, timely and pro-active.' Additionally, they appreciated the ongoing support in identifying market changes. Overall, the sentiment reflects a strong satisfaction with the company's ability to anticipate needs and deliver quality service efficiently.

Financial Services for Financial & Economic Media Company

5.0 Sep 14, 2023

Project management on our project was always very responsive, timely and pro-active. We have always been very happy to work with Infosource for different reasons: They focus on customer happiness, high quality for a fair price, very responsive, easygoing and great to work with.
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Industry Experience

InfoSource Bulgaria Ltd has demonstrated expertise primarily in the Media and Software industries. Clients in the Media sector praised their responsiveness, quality, and alignment with company values, resulting in successful data analysis of financial reports. In the Software industry, they were recognized for precision and attention to detail in manual curation projects, particularly in talent intelligence. Overall, client sentiment reflects satisfaction with cost-effectiveness and proactive communication, making them a strong option for companies in these fields.
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Software Media

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Average Project Cost Breakdown

$50,000 to $199,999 (1)

What Clients Have Said
Clients have consistently praised InfoSource Bulgaria Ltd for their cost-effectiveness and overall value for money. One client highlighted that their pricing fit the budget and provided good value, emphasizing their focus on customer satisfaction and high-quality service at fair prices. Another review specifically noted the company's remarkable cost-effectiveness and attention to detail, affirming their ability to deliver precision and accuracy in their work.
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Netherlands (1) United States (1)

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Callboxs

5.0 4 reviews

$5,000+

< $25 / hr

250 - 999

Burgas, Bulgaria

Services provided

50% Call Center Services

30% Customer Service Outsourcing

20% Back Office Outsourcing

Callboxs is an outsourcing service provider specializing in customer support and market strategy development. Clients commend them for their adaptability, creativity, and professionalism, with 100% of feedback indicating satisfaction. Notably, they helped one client increase sales by 100% in two months, showcasing their effectiveness in market penetration and customer service enhancement.

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Reviews mention Flexible
Callbox has received positive feedback regarding their flexibility in adapting to client needs. A COO noted their 'flexible approach and high professionalism,' which was instrumental in successfully entering the challenging Eastern European market. The client emphasized that Callbox's support through administrative services and tailored strategies significantly contributed to increased sales and overall project success. Overall, the sentiment reflects a strong appreciation for Callbox's adaptability and commitment to client objectives.

Business Consulting for Logistics Company

5.0 Sep 21, 2021

They are a stable partner, fully committed to achieving common goals. They have a flexible approach and high professionalism.
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Industry Experience

Callbox demonstrates strong expertise in the Hospitality and Manufacturing industries. Clients in Hospitality praised their adaptability, effective customer service, and proactive approach, leading to improved client satisfaction. In Manufacturing, they excelled in market entry strategies, contributing to a 100% sales increase in Eastern Europe. Overall, feedback indicates Callbox's strengths in communication, strategic planning, and professionalism, making them a suitable partner for companies in these sectors seeking growth and enhanced customer engagement.
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Hospitality & leisure Manufacturing

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Average Project Cost Breakdown

Less than $10,000 (1) $10,000 to $49,000 (1)

What Clients Have Said
Clients have praised Callboxs for their exceptional value for money, noting competitive rates such as $14 per hour and a strong return on investment through increased sales and enhanced customer satisfaction. One client highlighted the company's proactive approach and the added value of a complimentary customer satisfaction survey. Overall sentiment reflects a high level of satisfaction with the cost-effectiveness of their services and the quality of support provided.
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ScaleRush

5.0 2 reviews

Undisclosed

Undisclosed

10 - 49

Sofia, Bulgaria

Services provided

80% Sales Outsourcing

20% Email Marketing

Scale Rush is a lead generation and sales outsourcing company known for its effective custom pipelines and tailored outreach strategies. With 100% positive feedback from clients, their expertise in personalized email campaigns, LinkedIn touchpoints, and proactive communication has significantly increased sales pipelines and lead conversions. Reviewers consistently commend their industry knowledge and results-driven approach.

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Industry Experience

Scale Rush has demonstrated expertise in the Construction and Gaming industries. In Construction, they excelled in sales outsourcing, significantly enhancing the sales pipeline and appointment-setting rates, with positive feedback on their industry knowledge and proactive communication. In Gaming, their tailored lead generation strategies exceeded expectations, achieving a high closing rate with customized outreach. Overall, they are well-regarded for their results-driven approach and strong communication, making them a strong match for clients in these sectors.
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Construction Gaming

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Average Project Cost Breakdown

$10,000 to $49,000 (1)

What Clients Have Said
Clients have consistently praised Scale Rush for providing excellent value for their cost. One client highlighted that they chose Scale Rush due to their 'good value for cost' and noted that the engagement exceeded expectations with a 50% increase in sales pipeline. Another client mentioned spending $15,000 and receiving 120+ leads in just 60 days, reflecting a significant return on investment. Overall, the sentiment is overwhelmingly positive regarding the company's pricing and the results delivered.
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Bulgaria (1) Switzerland (1)

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PowerSellers

5.0 2 reviews

$10,000+

Undisclosed

2 - 9

Sofia, Bulgaria

Services provided

60% Sales Outsourcing

25% Market Research

15% Call Center Services

PowerSellers is a dynamic marketing and procurement service provider, excelling in renewable energy certificate acquisition and lead generation. Consistently praised for their flexibility and proactive communication, 100% of reviews highlight their budget-friendly pricing and strong project management skills, with one client noting a 72% annual increase in lead generation.

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Reviews mention Reasonable pricing
Clients have expressed positive sentiments regarding PowerSellers' pricing, highlighting it as a key factor in their selection. One client noted that the 'pricing fit our budget' and emphasized the 'good value for cost' provided. Additionally, the successful acquisition of Renewable energy certificates at a 'fair price' further underscores the reasonable pricing strategy employed by PowerSellers. Overall, the feedback reflects a strong appreciation for their cost-effectiveness and value proposition.

Certificate Acquirement & Redemption for Cocoa Products Co

5.0 Apr 19, 2024

Acquiring the iRec at a fair price, from reputable sources with proper redemption to disclose to the market.
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Industry Experience

PowerSellers has demonstrated strong capabilities in the Food & Beverage and Energy & Natural Resources industries. Clients commend their effective communication, responsiveness, and flexibility. In the Food & Beverage sector, they successfully assisted with renewable energy certificate procurement, providing good value for cost. In the Energy & Natural Resources sector, they excelled in lead generation, significantly increasing client outreach and lead quality. Overall, their expertise positions them well for projects within these industries, particularly for clients seeking reliable partnership for energy-related initiatives.
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Food & Beverage Energy & natural resources

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Average Project Cost Breakdown

$10,000 to $49,000 (1) $200,000 to $999,999 (1)

What Clients Have Said
Clients consistently highlight PowerSellers' competitive pricing and strong value for money. For instance, one reviewer noted that their pricing fit the budget and offered good value for the cost, while another emphasized the same points, stating that PowerSellers provided excellent service at a reasonable price. Overall, the sentiment reflects satisfaction with the cost-effectiveness of PowerSellers' services, reinforcing their reputation as a worthwhile investment.
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More responsive than most other service providers

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ODEON msc - A TTC brand

Not yet reviewed

$1,000+

$25 - $49 / hr

10 - 49

Sofia, Bulgaria

Services provided

20% Finance & Accounting Outsourcing (FAO)

20% HR Consulting

10% Accounting +5 services

10% Back Office Outsourcing

10% Business Consulting

10% Call Center Services

10% Customer Service Outsourcing

10% Sales Outsourcing

Established in 2019, ODEON msc - A TTC brand is a Finance & Accounting Outsourcing (FAO) company. The team offers Finance & Accounting Outsourcing (FAO) and HR Consulting.
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Expand Acquisition

Not yet reviewed

Undisclosed

Undisclosed

2 - 9

Sofia, Bulgaria

Services provided

50% Email Marketing

50% Sales Outsourcing

Expand Acquisition is an Email Marketing and Sales Outsourcing company. They are based in Sofia, Bulgaria and have small team of experts. Their services include Email Marketing and Sales
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Sixty K Ltd

Not yet reviewed

$50,000+

< $25 / hr

1,000 - 9,999

Sofia, Bulgaria

Services provided

80% Customer Service Outsourcing

10% Back Office Outsourcing

10% Call Center Services

Sixty K Ltd is a large Customer Service Outsourcing company. Founded in 2008, the team focuses on Customer Service Outsourcing and Back Office Outsourcing.
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BPO Bulgaria

Not yet reviewed

$1,000+

$25 - $49 / hr

2 - 9

Plovdiv, Bulgaria

Services provided

25% Accounting

25% Call Center Services

25% Customer Service Outsourcing +1 service

25% Tax Law

Phone answering service BPO Bulgaria was established in 2014. The small team specializes in Call Center Services and Accounting.
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Virtuwise

Not yet reviewed

$1,000+

< $25 / hr

10 - 49

Varna, Bulgaria

Services provided

20% Branding

20% Business Consulting

20% Digital Strategy +2 services

20% Email Marketing

20% Sales Outsourcing

Launched in 2023, Virtuwise is a branding firm. The company specializes in Branding and Digital Strategy, and is small.
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Varna, Bulgaria

Morska Sirena str. 27, office 2
Varna, Bulgaria 9002
10 - 15

+359885918045

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Euro Connect

Not yet reviewed

$1,000+

$25 - $49 / hr

2 - 9

Sofia, Bulgaria

Services provided

40% Call Center Services

40% Customer Service Outsourcing

20% Sales Outsourcing

Euro Connect is a small phone answering service in Sofia, Bulgaria. The team offers Call Center Services and Customer Service Outsourcing.
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eTel Digital Agency

Not yet reviewed

Undisclosed

Undisclosed

50 - 249

Sofia, Bulgaria

Services provided

20% E-Commerce Development

20% Email Marketing

20% Sales Outsourcing +3 services

20% Social Media Marketing

10% Search Engine Optimization

10% Web Design

Social media marketing firm eTel Digital Agency was founded in 2001. The midsize team specializes in Social Media Marketing and Email Marketing.
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Customer Umbrella

5.0 20 reviews

$1,000+

< $25 / hr

250 - 999

Varna, Bulgaria

Services provided

20% Back Office Outsourcing

20% Call Center Services

20% IT Managed Services +4 services

15% Customer Service Outsourcing

10% IT Staff Augmentation

10% Staffing

5% Recruiting

Customer Umbrella is a versatile customer support and development service provider, offering services such as software development, customer support, and content moderation. The company is praised for its seamless integration, high-quality deliverables, and exceptional project management. Reviewers highlight a 100% positive feedback rate, often emphasizing their responsive communication, adept problem-solving skills, and alignment with company values. Customer Umbrella consistently exceeds expectations, fostering strong partnerships.

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Industry Experience

Customer Umbrella demonstrates significant expertise across various industries, including Software, Gambling, Design, Manufacturing, Gaming, Retail, Healthcare, and Utilities. Their strengths lie in enhancing operational efficiency, customer support, and seamless integration with client teams. Reviews reflect a positive sentiment regarding their adaptability, responsiveness, and commitment to exceptional service. Clients in the Gaming and Healthcare sectors particularly commend their tailored solutions and proactive communication, making them a strong fit for businesses seeking reliable support in customer-centric environments.
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Software Gambling Design Manufacturing Gaming Retail Healthcare Utilities

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More responsive than most other service providers

Customer Umbrella is very responsive
They are a great candidate to start a conversation with. Send them a short message or project inquiry.
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United States (5) Cyprus (2) Germany (2) Canada (1) England (1)

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Alba Center

Not yet reviewed

$1,000+

$25 - $49 / hr

2 - 9

Sofia, Bulgaria

Services provided

50% Call Center Services

25% Customer Service Outsourcing

25% Sales Outsourcing

Alba Center, a small phone answering service, is headquartered in Sofia, Bulgaria. The team focuses on Call Center Services and Sales Outsourcing.
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Latiane Ltd

Not yet reviewed

Undisclosed

Undisclosed

50 - 249

Balsha, Bulgaria

Services provided

60% Call Center Services

40% Recruitment Process Outsourcing

Latiane Ltd, a midsize telephone answering service, is in Balsha, Bulgaria. Their services include Call Center Services and Recruitment Process Outsourcing.
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Callhalla

Not yet reviewed

$1,000+

$25 - $49 / hr

2 - 9

Sofia, Bulgaria

Services provided

50% Call Center Services

50% Customer Service Outsourcing

Callhalla, an answering service and Customer Service Outsourcing company, was established in 2014. The small team offers Call Center Services and Customer Service Outsourcing.
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MarketStar Bulgaria

5.0 28 reviews

$25,000+

Undisclosed

1,000 - 9,999

Sofia, Bulgaria

Services provided

75% Sales Outsourcing

20% Product Marketing

5% Direct Marketing

MarketStar Bulgaria, formerly Out2Bound, is a sales development agency specializing in sales strategy development, sales team training, and lead generation. Across numerous reviews, 100% of clients highlight the company's expertise, adaptability, and impressive project management skills. Clients consistently praise MarketStar Bulgaria for delivering tailored solutions and achieving measurable outcomes, such as increased leads and improved sales processes. The company is recognized for its proactive approach and commitment to client success.

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Reviews mention Accommodating
MarketStar Bulgaria has received positive feedback regarding their accommodating nature, with clients highlighting their responsiveness and adaptability. One client noted the vendor's ability to quickly hire a French-speaking associate to enhance project success in the French market. Another client emphasized the agency's agile adjustments to communication strategies and workflows, stating that all changes were made readily when needed. Overall, the sentiment reflects a strong appreciation for the company's flexibility and willingness to meet client needs.

Lead Generation for Software Development Company

5.0 Aug 17, 2022

They jumped into our shoes very quickly; the initial training was short yet productive. The guys are very adaptive and tech-savvy, so they quickly grasp the concept of our services and products.
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Lead Generation for Privacy Software Firm

4.5 Jul 18, 2019

The workflow is quite effective and again Out2Bound has been very flexible and has been using our own CRM tools and complying with our own internal processes.
Read Full Review

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Industry Experience

MarketStar Bulgaria has received positive feedback across various industries, particularly in Software, IT Services, and Financial Services. Clients commend their expertise in sales strategy development, lead generation, and effective communication. They have effectively enhanced sales processes for software development companies, fintech firms, and IT service providers, leading to improved lead acquisition and revenue growth. Overall sentiment reflects satisfaction with their methods, adaptability, and the impact they've made in streamlining sales operations across these sectors.
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Select Industry to see insights

Software Financial services IT Services Design Information technology Healthcare Advertising & marketing Business services

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Average Project Cost Breakdown

Less than $10,000 (15) $10,000 to $49,000 (9) $200,000 to $999,999 (2)

What Clients Have Said
Clients consistently praised MarketStar Bulgaria for offering good value for money, often highlighting their effective sales strategies and tailored training programs. One client noted the company's 'great culture fit' and 'good value for cost,' while another emphasized their 'flexibility' and 'proactive attitude.' Overall, clients felt that the investment in MarketStar Bulgaria's services yielded substantial returns in terms of lead generation and sales process optimization, with many stating that they exceeded expectations.
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Bulgaria (21) France (2) Switzerland (2) Luxembourg (1) Netherlands (1)

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MarketStar

Not yet reviewed

Undisclosed

Undisclosed

1,000 - 9,999

Sofia, Bulgaria

Services provided

65% Sales Outsourcing

15% Customer Service Outsourcing

10% Digital Strategy +1 service

10% Marketing Strategy

MarketStar is a Sales Outsourcing company. Established in 1988, the firm is in Ogden, Utah and Dublin, Ireland. Their services include Sales Outsourcing and Customer Service Outsourcing.
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Sofia, Bulgaria

bulevard "Cherni vrah"
Sofia, Bulgaria 1415
201 - 250

359 89 593 6318

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Why Trust Clutch

At Clutch, we believe trust is the foundation of every business relationship. Our mission is to help buyers make confident, data-backed decisions informed by real client experiences.

Every review on Clutch undergoes a rigorous, human-led verification process to make sure it’s valid. Our team of specialists confirms the identity of each reviewer, ensures the project is legitimate, and only publishes reviews that meet our strict criteria.

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We evaluate service providers using a structured methodology that combines:

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Market presence
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This data powers tools like the Leaders Matrix, which helps you compare agencies directly. Our research team curates rankings by weighing verified reviews most heavily, so the most trusted and experienced providers rise to the top.

Using this unique combination of verified client feedback and provider-supplied insights, Clutch distills the most important details into clear, digestible summaries so you have everything you need to make confident, informed decisions quickly.

We take fraud seriously. Providers who violate our guidelines may face lower rankings, restricted visibility, or removal from the platform altogether.

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Ability to deliver

Focus

Proven

Market Leaders

Emerging

Niche

Clutch Leaders Matrix

Rollover to see company insights or click a company below for more details.

1 MarKam Solutions

2 Mercatus

3 Lukanoff Consulting Ltd

4 Hypergen

5 Euroccor JSC

6 CXG Business Process Outsourcing

7 Passion4Growth

8 InfoSource Bulgaria Ltd

9 Callboxs

10 ScaleRush

11 PowerSellers

A Clutch Leaders Matrix provides a broad view of the top-performing companies in a particular service or location. Each company featured in a Leaders Matrix is evaluated based on Focus and Ability to Deliver. The size of each circle indicates that company’s size.

By using verified reviews, focused service details, and real project data, the Leaders Matrix highlights companies that consistently deliver and stand out from the rest. Each company’s position is based on how well they focus on a service area and how consistently they deliver results, helping you make informed, confident decisions. Learn More

Focus (x-axis)

Focus accounts for a company’s specialization within a certain service.

Ability to Deliver (y-axis)

Ability to Deliver considers three criteria:

Client feedback and reviews
Work experience and previous projects
Market presence and reputation in the industry

List of the Top 11 Bulgaria Outbound Call Center Providers

MarKam Solutions

$1,000+

< $25 / hr

50 - 249

Sofia, Bulgaria

Ability to deliver

32.6/40.0

17.6/20 Reviews

10/10 Clients & Experience

5/10 Market Presence

Service focus

180% Outbound Voice Services

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Mercatus

$5,000+

< $25 / hr

50 - 249

Sofia, Bulgaria

Ability to deliver

32.1/40.0

16.6/20 Reviews

9.8/10 Clients & Experience

5.7/10 Market Presence

Service focus

100% Outbound Voice Services

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Lukanoff Consulting Ltd

$1,000+

$50 - $99 / hr

2 - 9

Sofia, Bulgaria

Ability to deliver

28.2/40.0

16.2/20 Reviews

8/10 Clients & Experience

4/10 Market Presence

Service focus

90% Outbound Voice Services

10% Other

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Hypergen

$5,000+

$50 - $99 / hr

10 - 49

Sofia, Bulgaria

Ability to deliver

25.4/40.0

16.6/20 Reviews

3.7/10 Clients & Experience

5.2/10 Market Presence

Service focus

150% Outbound Voice Services

View Profile Visit Website
Euroccor JSC

$1,000+

$25 - $49 / hr

50 - 249

София, Bulgaria

Ability to deliver

22.9/40.0

14.6/20 Reviews

3/10 Clients & Experience

5.3/10 Market Presence

Service focus

290% Outbound Voice Services

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CXG Business Process Outsourcing

Undisclosed

Undisclosed

50 - 249

Sofia, Bulgaria

Ability to deliver

25/40.0

16.2/20 Reviews

3.9/10 Clients & Experience

4.9/10 Market Presence

Service focus

96% Outbound Voice Services

4% Other

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Passion4Growth

$1,000+

$50 - $99 / hr

2 - 9

Breznik, Bulgaria

Ability to deliver

23.4/40.0

16.6/20 Reviews

2.8/10 Clients & Experience

4/10 Market Presence

Service focus

150% Outbound Voice Services

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InfoSource Bulgaria Ltd

$1,000+

< $25 / hr

10 - 49

Sofia, Bulgaria

Ability to deliver

25.2/40.0

14.8/20 Reviews

5.5/10 Clients & Experience

4.9/10 Market Presence

Service focus

80% Outbound Voice Services

20% Other

View Profile Visit Website
Callboxs

$5,000+

< $25 / hr

250 - 999

Burgas, Bulgaria

Ability to deliver

21.4/40.0

16.2/20 Reviews

0.6/10 Clients & Experience

4.6/10 Market Presence

Service focus

200% Outbound Voice Services

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ScaleRush

Undisclosed

Undisclosed

10 - 49

Sofia, Bulgaria

Ability to deliver

21.2/40.0

17.2/20 Reviews

0/10 Clients & Experience

4/10 Market Presence

Service focus

240% Outbound Voice Services

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PowerSellers

$10,000+

Undisclosed

2 - 9

Sofia, Bulgaria

Ability to deliver

20.4/40.0

16.4/20 Reviews

0/10 Clients & Experience

4/10 Market Presence

Service focus

240% Outbound Voice Services

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ODEON msc - A TTC brand

$1,000+

$25 - $49 / hr

10 - 49

Sofia, Bulgaria

Ability to deliver

8.2/40.0

0/20 Reviews

3.6/10 Clients & Experience

4.6/10 Market Presence

Service focus

70% Outbound Voice Services

30% Other

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Expand Acquisition

Undisclosed

Undisclosed

2 - 9

Sofia, Bulgaria

Ability to deliver

4/40.0

0/20 Reviews

0/10 Clients & Experience

4/10 Market Presence

Service focus

150% Outbound Voice Services

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Sixty K Ltd

$50,000+

< $25 / hr

1,000 - 9,999

Sofia, Bulgaria

Ability to deliver

5.3/40.0

0/20 Reviews

0/10 Clients & Experience

5.3/10 Market Presence

Service focus

40% Outbound Voice Services

60% Other

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BPO Bulgaria

$1,000+

$25 - $49 / hr

2 - 9

Plovdiv, Bulgaria

Ability to deliver

4.9/40.0

0/20 Reviews

0/10 Clients & Experience

4.9/10 Market Presence

Service focus

100% Outbound Voice Services

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Virtuwise

$1,000+

< $25 / hr

10 - 49

Varna, Bulgaria

Ability to deliver

4.6/40.0

0/20 Reviews

0/10 Clients & Experience

4.6/10 Market Presence

Service focus

60% Outbound Voice Services

40% Other

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Euro Connect

$1,000+

$25 - $49 / hr

2 - 9

Sofia, Bulgaria

Ability to deliver

0/40.0

0/20 Reviews

0/10 Clients & Experience

0/10 Market Presence

Service focus

220% Outbound Voice Services

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eTel Digital Agency

Undisclosed

Undisclosed

50 - 249

Sofia, Bulgaria

Ability to deliver

0/40.0

0/20 Reviews

0/10 Clients & Experience

0/10 Market Presence

Service focus

60% Outbound Voice Services

40% Other

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Customer Umbrella

$1,000+

< $25 / hr

250 - 999

Varna, Bulgaria

Ability to deliver

28/40.0

17/20 Reviews

6.1/10 Clients & Experience

4.9/10 Market Presence

Service focus

80% Outbound Voice Services

20% Other

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Alba Center

$1,000+

$25 - $49 / hr

2 - 9

Sofia, Bulgaria

Ability to deliver

0/40.0

0/20 Reviews

0/10 Clients & Experience

0/10 Market Presence

Service focus

275% Outbound Voice Services

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Latiane Ltd

Undisclosed

Undisclosed

50 - 249

Balsha, Bulgaria

Ability to deliver

0/40.0

0/20 Reviews

0/10 Clients & Experience

0/10 Market Presence

Service focus

240% Outbound Voice Services

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Callhalla

$1,000+

$25 - $49 / hr

2 - 9

Sofia, Bulgaria

Ability to deliver

0/40.0

0/20 Reviews

0/10 Clients & Experience

0/10 Market Presence

Service focus

200% Outbound Voice Services

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MarketStar Bulgaria

$25,000+

Undisclosed

1,000 - 9,999

Sofia, Bulgaria

Ability to deliver

32.7/40.0

16.2/20 Reviews

9.7/10 Clients & Experience

6.8/10 Market Presence

Service focus

225% Outbound Voice Services

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MarketStar

Undisclosed

Undisclosed

1,000 - 9,999

Sofia, Bulgaria

Ability to deliver

5.8/40.0

0/20 Reviews

0/10 Clients & Experience

5.8/10 Market Presence

Service focus

195% Outbound Voice Services

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Latest Outbound Articles

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Updated April 23, 2026

Sydney Wess

Call center costs can add up over time, so it’s important that companies establish a thorough budget plan before outsourcing.

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Updated March 24, 2026

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Call center outsourcing is when a company hires a BPO service provider to handle inbound or outbound calls.

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Looking to hire a call center? Connecting with a reliable team has never been easier— check out our quick 4-step process to find the perfect partnership.

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Inbound Appointment Setting Sales Outsourcing Telemarketing Answering Services Third Party Verification Virtual Receptionist Lead Generation Appointment Setting Outbound

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Reviewed 1 time in the past 6 months

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Reviewed 2 times in the past 6 months

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Why Trust Clutch

List of the Top 11 Bulgaria Outbound Call Center Providers

Latest Outbound Articles

How to Build a Budget for Call Center Services [With Template]

Guide to Call Center Outsourcing