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Best Call Center Companies in Denver, CO 2021

Businesses need to prioritize customer service in the coming years. Based on a survey, 51% of customers believe that most brands do not care about hearing feedback. 26% of them also disclosed that reaching out to customer service support has gotten harder in recent years. With these numbers, there really is a need to review how companies attend to customer support. Their efforts, especially during a technologically-advanced world, should match consumer expectations and provide a great experience.

To further boost the importance of customer service, additional surveys point out that 58% of customers think that it is something that should be considered as a top priority of businesses. Additionally, 70% of global customers view businesses positively when they serve proactive customer service.

Businesses looking to invest in customer service should find a partner that will address their needs or issues. Here are some of the best call center companies in Denver to look out for.

Best Call Center Companies in Denver, CO 2021


IntelliSource has 20 years of outsourcing experience -- bringing innovative business solutions to their customers.

Over its 20 years of existence, IntelliSource remained committed to its principles of people matter and that growth is an inside-out job. Formed in 1999, the call center company is all about ensuring that its clients fully get what they signed up for after deciding to partner with IntelliSource. 

Trusted by companies in the Fortune 500 list, the company continues to prioritize agility and being innovative in the field of customer service. It believes that those two factors are essential in helping its clients achieve their full potential regardless of their size and industry. 

IntelliSource is an outsourcing business company committed to transforming how their clients do their everyday operations. The company offers services including business process outsourcing, workforce resources and manufacturing logistics. 

The business process outsourcing service offered by IntelliSource always aligns itself with the long-term business goals of its clients. The services under this category are all designed to help in achieving growth without compromising core competencies. Services offered by IntelliSource include sales support, customer contact centers, technical support, consumer-based billing, and security, fraud & compliance.


GenSales specializes in B2B lead generation, appointment setting and quality prospect databases.

Named as the top telemarketing company to watch in 2019, GenSales has been providing targeted sales activities since its founding in 2002 in Denver, Colorado. The company has offered lead generation, appointment setting, database acquisition, calendar integration and customer relations management services. 

The company’s success in B2B services boils down to the consistent observance of the company’s four guiding pillars. Those pillars include maintaining its rigid data collection process, a consistent and trusted-and-proven approach in introducing its business to target customers, connecting with the client by appointment or web demonstration and lead nurturing.

GenSales offers services including lead generation strategy, B2B appointment setting, lead generation, quality prospect databases and market research -- telephone surveys. The company has been honing and perfecting these services over the years and has now become the go-to call center company of businesses in the area. 

It distinguishes itself from the rest by maintaining quality prospect databases, investing and building state-of-the-art call center facilities and technologies, and hiring and nurturing the right people.


It is committed to going the extra mile to enhance its caller's experience and resolve their needs.

Combining the tried-and-tested people skills of its core team and harnessing the growing power of technology is how Alphapage delivers its brand of customer service. This call center company understands that it is an extension of their client’s business -- a touchpoint for the intended market. This full knowledge of how customer service works is what allows Alphapage to improve customer relationships and consumer experience. 

The company values the power of customer service representatives in helping achieve the goals of its clients. It knows how a caller’s experience of their interaction with an agent can make or break a brand. This is the reason behind the call center provider’s focus on hiring passionate and experienced people into its team. These people are capable of properly listening to promptly provide a solution to the customers and respect them throughout the call. 

Aside from people, technology is also valuable to the company. Alphapage makes use of the Amtelco Infinity switch in handling its customer support services. This technology allows the firm to be reliable and efficient in providing voice messaging, call data analysis and advanced digital switching to its clients. Aside from Amtelco, it also maintains partnerships with Professional Teledata, ATSI and NAEO in keeping its technology at the highest level of quality.

The call center company provides services to major industries including healthcare, eCommerce, hospitality, construction, legal and real estate. 

ADL Call Center

ADL (Call Center) guarantees to every business no sick days, flat rates and no hidden fees.

ADL treats customer service support like how it would handle luxury goods -- with the utmost care it can muster. The company makes sure no calls will be missed while maintaining low operating costs and ensuring the continuous delivery of quality service to customers.

This Denver-based call center solutions provider offers all the essential services needed by businesses in terms of customer support. It can provide human resource support, answering service, administrative support service, live chat and custom account services.

The answering service offered by ADL is an example of how it excellently delivers solutions to its clients. Its operations are done either from a centralized or remote office and carried out by competent, well-trained and friendly customer service representatives. 

Amid the intense competition in the industry, ADL makes itself stand out with its set of guarantees - it promises to be always ready to provide any business’ needs 24/7 or through customized operating hours. The company also ensures that its people are qualified and highly experienced but without breaking the client’s pockets.

Inflow Communications

Inflow focuses exclusively on Unified Communications and Contact Center implementation, support and optimization. It is a Mitel ShoreTel Platinum Partner and support over 200,000 endpoints around the world.

Formed in 1997, Unified Communications and Contact Center Solutions is all about sound strategy, efficient optimization and quality execution. The company believes that it is through repeated and committed implementation of those three elements that would greatly help businesses disrupt their industry. 

The call center company also takes pride in keeping its clients happy. Unified Communications has seen 99% customer satisfaction based on a recent survey. The company found that it was eight times faster than competitors in any Mitel or ShoreTel related issues. 

One of its greatest strength lies in its vast geographic network. While the company started in Portland, Oregon, it has a presence in San Francisco, California, Miami, Florida, Atlanta, Georgia and Denver, Colorado.

The company caters to the needs of Domino’s, Zillow, Thyssenkrupp and Driscolls.

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