
Domestic Calling Services
Customer support, tele calling, sales campaigns, lead generation, verification and retention support.
Learn moreARSTOX PRIVATE LIMITED delivers professional domestic and international voice, non-voice and back-office outsourcing solutions. Through trained professionals, structured workflows, transparent reporting and responsible management, we help businesses improve customer experience, optimize operational costs and achieve sustainable growth.

ARSTOX PRIVATE LIMITED is a professionally managed Business Process Outsourcing company headquartered in Kolkata, India. We provide customized customer support, telemarketing, lead generation, verification, sales, quality assurance and back-office solutions for domestic and international businesses.
Our operating model combines trained professionals, reliable infrastructure, quality monitoring and transparent client communication. We understand that every customer interaction represents our client's brand; therefore, our teams are trained to communicate responsibly, professionally and effectively. Our objective is to build long-term relationships with clients, employees, investors and strategic partners through dependable service delivery, responsible expansion and measurable business performance.
K. Saha is the Founder and Director of ARSTOX PRIVATE LIMITED, responsible for the company's strategic direction, operational growth, business development and corporate relationships. With a strong entrepreneurial vision, K. Saha established ARSTOX to provide reliable outsourcing solutions while creating meaningful career opportunities for talented professionals.
Under K. Saha's leadership, the company is developing a scalable operating model focused on workforce development, customer satisfaction, transparent business practices and long-term value creation. K. Saha remains actively involved in client relationships, strategic partnerships, service expansion and the continuous improvement of operational quality.
The leadership vision is to establish ARSTOX as a trusted and globally recognized BPO organization known for professionalism, responsible management and dependable service delivery.
“At ARSTOX, we believe that every customer interaction is an opportunity to build trust. Our commitment is to represent our clients responsibly, develop skilled professionals and deliver outsourcing solutions that create measurable and sustainable business value.”— K. Saha, Founder & DirectorMeet the Leadership Team


Customer support, tele calling, sales campaigns, lead generation, verification and retention support.
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Professional global calling solutions for USA, UK, Canada, Australia, UAE and other markets.
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Data entry, email support, chat support, CRM management, QA and virtual assistant services.
Learn moreOur operating model combines professional people, reliable service, modern infrastructure and global standards.
Build Your TeamOur teams receive process-specific, communication and customer-handling training.
Flexible team structures allow clients to begin with a pilot and expand according to performance.
Clients receive structured productivity, quality and performance reports.
Regular call monitoring, coaching and performance reviews support consistent service delivery.
Solutions can be customized according to team size, shift, campaign and business objectives.
Client information is managed according to approved access, confidentiality and process requirements.
Service Delivery Models
Industries Served
Specialized Processes
Operational Support



Loan, credit card and support processes.
Health, auto, life and Medicare support.
Medical billing and revenue cycle support.
Support, sales and customer retention.
We map your business process, goals, volumes and customer expectations.
We shape the team, workflow, KPIs, scripts and compliance needs.
We train, monitor and transition the process with disciplined support.
We coach, report and optimize for quality, productivity and customer satisfaction.
Tell us what you need. We will design a practical outsourcing solution around your goals.