Colorado is home to an emerging digital advertising industry characterized by innovative approaches to brand messaging and audience engagement. Companies here range from full-service marketing agencies to specialized firms focusing on SEO, programmatic ad buying, and social media campaigns. As businesses increasingly shift their marketing budgets to digital channels, these agencies continuously evolve to meet client needs. The trend highlights an emphasis on data-driven strategies and measurable results, making Colorado an attractive location for digital advertising expertise and talent.


The companies featured in this list represent various sizes and specialties within Colorado’s digital advertising space. From smaller agencies with specialized services to larger firms offering comprehensive advertising solutions, they reflect a collective commitment to client-centric strategies established since the mid-1990s. Many of these firms are based in Denver, while others extend their influence to regions like Boulder and Colorado Springs. Their expertise ranges from programmatic advertising and SEO to social marketing and web design.


Continue reading to explore the top digital advertising companies in Colorado.


Top 22 Digital Advertising Companies in Colorado


1. Choozle

  • Website: choozle.com
  • Ownership type: Private Equity
  • Headquarters: Denver, Colorado, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Latest funding: Series C, $15.0M, May 2021
  • Founded year: 2012
  • Headcount: 51-200
  • LinkedIn: choozle

Choozle, founded in 2012 and based in Denver, Colorado, operates as a digital advertising agency that specializes in programmatic advertising solutions. The company serves mid-market agencies and brands, providing a platform that simplifies the complexities of digital marketing. Choozle's offerings include a range of advertising channels such as display, video, audio, and social media, allowing clients to optimize their advertising strategies effectively. With a workforce of approximately 59 employees, Choozle has managed to deliver over 97,000 campaigns since its inception. The company has also secured $15 million in Series C funding as of May 2021, which underscores its growth potential and relevance in the industry. Choozle's commitment to transparency, user-friendly technology, and expert guidance further enhances its position as a valuable partner for businesses navigating the digital advertising landscape.


2. SocialSEO Inc

  • Website: socialseo.com
  • Ownership type: Private
  • Headquarters: Colorado Springs, Colorado, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1996
  • Headcount: 51-200
  • LinkedIn: social-seo-inc

SocialSEO Inc, now operating under the name Intero Digital, is a digital marketing agency based in Colorado Springs, Colorado. Founded in 1996, the company has built a reputation for providing a wide array of services aimed at improving online presence and driving sales for businesses. Their offerings include search engine optimization (SEO), pay-per-click (PPC) advertising, social media marketing, and web design. Over the years, SocialSEO has worked with various brands, showcasing their ability to adapt to the evolving digital landscape. The agency prides itself on its client-centric approach, ensuring that their strategies are tailored to meet the unique needs of each business. With a team of experienced professionals, they focus on delivering measurable results and maintaining open communication with clients. SocialSEO has not reported any funding, indicating a self-sustained growth model.


3. Adtaxi

  • Website: adtaxi.com
  • Ownership type: Private
  • Headquarters: Denver, Colorado, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2010
  • Headcount: 51-200
  • LinkedIn: adtaxi-networks

Adtaxi, founded in 2010 and based in Denver, Colorado, is a digital marketing agency that specializes in providing comprehensive marketing solutions. The company focuses on programmatic advertising, search marketing, and social media management, helping businesses enhance their online presence. Adtaxi serves a wide range of industries, including automotive, healthcare, and nonprofit organizations, demonstrating its capability to adapt to various market needs. Their approach is centered on understanding client goals and delivering measurable results through strategic execution. Adtaxi also offers marketing research services, which provide insights to inform client strategies. The agency prides itself on transparency and client partnership, aiming to function as an extension of its clients' teams to drive performance and success.


4. Voice Media Group

  • Website: voicemediagroup.com
  • Ownership type: Private
  • Headquarters: Denver, Colorado, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Latest funding: March 2010
  • Founded year: 2012
  • Headcount: 501-1000
  • LinkedIn: voice-media-group

Voice Media Group, based in Denver, Colorado, is a media company founded in 2012 that specializes in digital marketing, event marketing, and print media. The company operates several well-known publications, including the Dallas Observer, Denver Westword, Miami New Times, New Times Broward-Palm Beach, and Phoenix New Times. Through its digital marketing agency, V Digital Services, Voice Media Group provides a comprehensive suite of marketing solutions aimed at helping businesses improve their visibility and engagement. Their services include display advertising, social media advertising, SEO, and event marketing, catering to both local and national markets. With a workforce of around 111 employees, the company has established a significant presence in the digital marketing space, focusing on innovative strategies to drive client success. Their publications not only serve as platforms for advertising but also engage millions of readers, further enhancing their advertising capabilities.


5. Prairie Mountain Media


Prairie Mountain Media, founded in 2006 and based in Boulder, Colorado, operates as a marketing agency that provides a blend of digital and print advertising services. The company caters primarily to local businesses, helping them connect with high-value audiences through a variety of media channels. Their offerings include display ads, search engine marketing (SEM), search engine optimization (SEO), and social media advertising, among others. With a strong emphasis on client-centric solutions, Prairie Mountain Media utilizes an integrated network of local brands and media properties, including 15 newspaper brands that have served their communities for over a century. This extensive reach allows them to deliver significant digital impressions and proven results for advertisers. Their commitment to personalized marketing services and performance-driven strategies makes them a notable entity in the digital advertising industry.


6. Precision Industrial Contractors, Inc.


Precision Industrial Contractors, Inc., based in Brighton, Colorado, has been operational since 1992. This private company employs between 51 to 200 individuals and has established itself as a digital marketing agency. They offer a range of services that include advertising, search engine optimization (SEO), and cloud-based solutions. Their client base spans both businesses and consumers, allowing them to craft customized marketing strategies tailored to specific needs. The company has developed a portfolio that includes multiple brands, enhancing its market reach across various sectors, particularly in healthcare and legal services. Despite not having reported any funding, their longevity and adaptability in the digital marketing space suggest a commitment to evolving with industry trends and client demands.


7. Booyah Advertising


Booyah Advertising is a digital marketing agency based in Denver, Colorado, founded in 2001. With a team of over 100 digital experts, the agency specializes in a wide array of services designed to enhance online presence and drive customer engagement. Their offerings include paid media strategies, search engine optimization (SEO), content marketing, and creative design. Booyah partners with various businesses to tailor marketing strategies that yield measurable results. The agency emphasizes data-driven decision-making and provides clients with transparent reporting to help them achieve their marketing goals. Recently, Booyah has expanded its reach through the acquisition of PPC Sidekick, a move that underscores its commitment to growth and innovation in the digital advertising space.


8. SpotX (now part of Magnite)

  • Website: spotx.tv
  • Ownership type: Corporate
  • Headquarters: Denver, Colorado, United States (USA)
  • Employee distribution: United States (USA) 79%, United Kingdom (UK) 15%, Netherlands 3%, Other 3%
  • Latest funding: $1.1B, February 2021
  • Founded year: 2007
  • Headcount: 501-1000
  • LinkedIn: spotx

SpotX, now integrated into Magnite, is an advertising technology firm based in Denver, Colorado. Founded in 2007, the company specializes in programmatic video advertising solutions tailored for premium publishers and broadcasters. SpotX's platform enables clients to effectively monetize their video content through targeted advertising strategies. The company has established a strong presence in the media and entertainment sectors, providing tools that facilitate the sale of ad inventory across various digital channels. SpotX has also received significant funding, amounting to $1.14 billion, which underscores its growth potential and commitment to innovation in the digital advertising space.


9. N-Compass TV

  • Website: n-compass.tv
  • Ownership type: Private
  • Headquarters: Lakewood, Colorado, United States (USA)
  • Employee distribution: United States (USA) 70%, Philippines 30%
  • Founded year: 2008
  • Headcount: 51-200
  • LinkedIn: n-compass-tv

N-Compass TV, founded in 2008 and based in Lakewood, Colorado, is a private digital marketing agency that specializes in indoor digital billboards and a comprehensive suite of marketing services. The company has established a network of over 4,000 screens across more than 250 cities in the United States, focusing on community-based advertising. N-Compass TV empowers local businesses by providing tools and resources to enhance their advertising efforts, including social media management, website development, and targeted advertising strategies. Their unique dealership model allows individuals to operate their own digital marketing companies, promoting entrepreneurial growth and fostering community engagement. N-Compass TV is actively involved in the rapidly growing digital out-of-home (DOOH) advertising sector, positioning itself as a significant player in the digital media space.


10. AdCellerant

  • Website: adcellerant.com
  • Ownership type: Private Equity
  • Headquarters: Denver, Colorado, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Latest funding: Other (Debt), January 2024
  • Founded year: 2013
  • Headcount: 201-500
  • LinkedIn: adcellerant

AdCellerant is a digital marketing agency based in Denver, Colorado, specializing in a comprehensive suite of marketing solutions tailored to meet the needs of businesses and organizations. Founded in 2013, the company focuses on programmatic advertising, SEO services, and campaign management, leveraging technology to enhance the effectiveness of digital marketing efforts. AdCellerant's platform allows clients to manage and analyze their campaigns seamlessly, providing tools for proposal automation, reporting, and insights. With a team of over 170 employees, the company emphasizes training and support, ensuring that clients can navigate the complexities of digital marketing. Their commitment to client success is evident in their extensive case studies and partnerships with local media agencies. AdCellerant has been recognized for its contributions to the industry, receiving accolades from various publications, which underscores its relevance and impact in the digital advertising sector.


11. NLA Media

  • Website: nlamedia.com
  • Ownership type: Private
  • Headquarters: Colorado Springs, Colorado, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1996
  • Headcount: 11-50
  • LinkedIn: newell-ledbetter-advertising

NLA Media, based in Colorado Springs, Colorado, is a marketing agency that has been serving clients since 1996. The company specializes in a wide array of marketing and advertising services, including television and radio advertising, digital marketing, search engine optimization (SEO), and social media management. With a team of 11 to 50 employees, NLA Media prides itself on its ability to help businesses enhance their visibility and effectively reach their target audiences. Their approach combines traditional and digital marketing strategies, allowing them to cater to various client needs. NLA Media has produced over 1,000 television and radio commercials, showcasing their extensive experience in media production. They emphasize the importance of understanding client missions and visions to create engaging and effective advertising campaigns. Their focus on measurable results and return on investment further underscores their commitment to client success.


12. Fortnight Collective

  • Website: fortnightcollective.com
  • Ownership type: Private
  • Headquarters: Boulder, Colorado, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2016
  • Headcount: 11-50
  • LinkedIn: fortnight-collective

Fortnight Collective, based in Boulder, Colorado, is an advertising agency that specializes in branding and marketing services. Founded in 2016, the company has grown to a team of approximately 30 employees, supported by a collective of over 200 senior-level talents. This structure allows them to tackle a wide range of projects efficiently. Fortnight Collective focuses on enhancing brand visibility and market presence through services such as brand strategy, campaign production, and digital media management. Their client portfolio includes well-known names like Noodles & Company and Vrbo, reflecting their capability to engage with various sectors. The agency's unique approach combines speed and creativity, enabling them to deliver impactful advertising solutions in a timely manner.


13. Amélie Company

  • Website: ameliecompany.com
  • Ownership type: Private
  • Headquarters: Denver, Colorado, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2002
  • Headcount: 11-50
  • LinkedIn: ameliecompany

Amélie Company, based in Denver, Colorado, is a creative agency founded in 2002. With a team of 45 employees, the agency specializes in advertising and marketing services that help businesses and organizations build impactful brands. Their offerings include brand strategy, digital media, and creative campaigns, catering to clients across various sectors. Amélie Company is particularly noted for its commitment to social causes, as demonstrated by their work on campaigns addressing addiction stigma, mental health, and community health initiatives. They have developed a reputation for creating provocative and engaging content that resonates with audiences, making them a relevant player in the digital advertising space. The agency operates without reported funding, indicating a self-sustaining business model that focuses on delivering value to clients through innovative marketing solutions.


14. Assembly Media Networks, Inc.

  • Website: brandzooka.com
  • Ownership type: Venture Capital
  • Headquarters: Boulder, Colorado, United States (USA)
  • Latest funding: Series A, $5.6M, October 2020
  • Founded year: 2015
  • Headcount: 11-50
  • LinkedIn: assembly-media-networks-inc.

Assembly Media Networks, Inc., known for its platform Brandzooka, is a digital advertising company based in Boulder, Colorado. Founded in 2015, the company has carved out a niche by providing a user-friendly platform that allows brands, agencies, and political organizations to create and manage advertising campaigns across multiple digital channels, including web, mobile, connected TV, and digital audio. Brandzooka's approach emphasizes ease of use, enabling clients to launch campaigns with minimal financial commitment and without the burden of contracts. The platform integrates with over 200 data and inventory partners, offering access to a vast array of audience profiles. In October 2020, the company secured $5.6 million in Series A funding, which underscores its growth potential and commitment to enhancing its advertising technology. This funding supports their mission to democratize access to effective advertising solutions for organizations of all sizes.


15. Strategus

  • Website: strategus.com
  • Ownership type: Private Equity
  • Headquarters: Englewood, Colorado, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Latest funding: January 2025
  • Founded year: 2014
  • Headcount: 11-50
  • LinkedIn: strateg-us

Strategus, founded in 2014 and based in Englewood, Colorado, is a private equity-owned advertising agency that specializes in Connected TV (CTV) advertising solutions. The company offers a range of services including audience targeting, creative ad production, and comprehensive campaign reporting. Strategus leverages a robust data ecosystem to ensure precise targeting and measurable outcomes for brands and agencies. With a team of approximately 89 employees, they have successfully delivered over 60,000 campaigns, serving more than 8.8 billion targeted ad impressions and driving 64 million conversions. Their focus on CTV allows them to provide tailored marketing solutions across various industries, including automotive, healthcare, and retail. Strategus has positioned itself as a key player in the CTV advertising space, emphasizing the importance of data-driven strategies and continuous optimization to enhance campaign performance.


16. January Spring

  • Website: januaryspring.com
  • Ownership type: Private
  • Headquarters: Denver, Colorado, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2017
  • Headcount: 11-50
  • LinkedIn: january-spring

January Spring, founded in 2017 and based in Denver, Colorado, is a digital marketing agency that specializes in programmatic advertising, social media advertising, and search & content advertising. With a team of 21 employees, the company serves a variety of clients, including businesses and media companies, helping them enhance their online presence. January Spring employs automated technology to place ads on various platforms, targeting users based on their interests and behaviors. Their services include audience curation, geofencing, and retargeting strategies, which are designed to optimize advertising effectiveness. The agency emphasizes a personalized approach, offering one-on-one training and support to ensure clients can effectively utilize their services. January Spring's focus on niche markets allows them to create tailored marketing plans that resonate with specific audiences, making them a relevant player in the digital advertising industry.


17. Twelve Three Media


Twelve Three Media is a digital marketing agency based in Golden, Colorado, founded in 2009. With a team of 26 employees, the company specializes in enhancing online visibility for businesses through a variety of services. These include search engine optimization (SEO), pay-per-click (PPC) advertising, social media management, and website design. Twelve Three Media caters to a range of industries, helping clients refine their marketing strategies and drive sales through data-driven methodologies. The agency prides itself on its in-house capabilities, ensuring that all services are delivered directly by their skilled team, which fosters strong client relationships and accountability. Their approach is characterized by a commitment to quality, strategic planning, and a focus on measurable outcomes, as evidenced by their successful case studies that highlight significant improvements in client performance.


18. Philosophy Communication


Philosophy Communication, based in Denver, Colorado, is a marketing agency founded in 2001. With a team of 11-50 employees, the agency specializes in marketing, public relations, and digital services. They work with clients across multiple sectors, helping to enhance brand presence and achieve business goals through customized strategies. Their service offerings include brand development, digital marketing, public relations, and strategic planning. Philosophy Communication has established a reputation for its commitment to building meaningful relationships with clients, which they believe is crucial for delivering effective marketing solutions. Their expertise spans various industries, including construction, food and agriculture, health and wellness, and luxury appliances, showcasing their adaptability and understanding of different market needs. The agency emphasizes a collaborative approach, ensuring that their strategies are aligned with the unique objectives of each client.


19. Digital First Media Inc.


Digital First Media Inc., based in Denver, Colorado, is a private advertising agency founded in 2011. The company focuses on providing a range of digital advertising resources and guidelines aimed at helping businesses improve their advertising strategies. Their services include email marketing, social media advertising, and various creative resources designed to optimize digital campaigns. Digital First Media emphasizes compliance and technical standards, offering detailed guidelines for creative banner ads, email marketing, and social media formats. This focus on providing structured support and resources positions them as a valuable partner for businesses looking to enhance their digital marketing efforts.


20. Karsh Hagan

  • Website: karshhagan.com
  • Ownership type: Private
  • Headquarters: Denver, Colorado, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1977
  • Headcount: 51-200
  • LinkedIn: karshhagan

Karsh Hagan is a marketing agency based in Denver, Colorado, founded in 1977. With a team of approximately 103 employees, the agency specializes in branding, design, media analytics, and digital solutions. They work with ambitious brands across various sectors, aiming to enhance their market presence through innovative campaigns and strategies. Karsh Hagan has developed notable projects, including destination stewardship campaigns and movements for well-known brands like Aspen Snowmass and Litehouse Dressings. Their approach emphasizes creative collaboration and bespoke solutions tailored to each client's unique needs. The agency has received recognition for its work, including awards for its website and workplace culture, highlighting its commitment to excellence in the marketing field.


21. Jemsu

  • Website: jemsu.com
  • Ownership type: Private
  • Headquarters: Denver, Colorado, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2010
  • Headcount: 11-50
  • LinkedIn: jemsu-

Jemsu is a digital marketing agency based in Denver, Colorado, founded in 2010. The company specializes in search engine optimization (SEO) and digital advertising, offering a wide array of services that include social media marketing, website design, and conversion rate optimization. With a team of passionate professionals, Jemsu collaborates closely with business owners and marketing managers to develop effective strategies aimed at increasing online visibility and driving traffic. They have worked with a variety of clients, from local businesses to national firms, demonstrating their ability to adapt to different market needs. Jemsu has also been recognized for its performance, appearing on the Inc. 5000 list of fastest growing companies twice, which highlights their growth and relevance in the digital marketing industry. Their approach is characterized by a commitment to measurable results and a data-driven methodology, ensuring that clients can track the effectiveness of their marketing efforts.


22. Directory Plus

  • Website: directoryplus.com
  • Ownership type: Private
  • Headquarters: Durango, Colorado, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1983
  • Headcount: 51-200
  • LinkedIn: directory-plus

Directory Plus, based in Durango, Colorado, has been connecting businesses with customers since 1983. Initially a market leader in local telephone directories, the company expanded its services to include digital marketing solutions in 2013. This shift allows them to assist local businesses in reaching customers through various online strategies, including website development, search engine optimization, social media management, content marketing, and online advertising. Their clientele spans multiple sectors, such as plumbing, auto repair, and legal services, reflecting their commitment to enhancing market presence for local businesses. Directory Plus emphasizes a tailored approach, working closely with clients to understand their unique needs and customer demographics. Despite their long-standing history and established local presence, they have not reported any recent funding, indicating a self-sustained business model.



Digital Advertising Insights: Key Companies in Colorado


CompanyHeadquarterSizeFoundedOwnership
ChoozleDenver, Colorado, United States (USA)51-2002012Private Equity
SocialSEO IncColorado Springs, Colorado, United States (USA)51-2001996Private
AdtaxiDenver, Colorado, United States (USA)51-2002010Private
Voice Media GroupDenver, Colorado, United States (USA)501-10002012Private
Prairie Mountain MediaBoulder, Colorado, United States (USA)201-5002006Private
Precision Industrial Contractors, Inc.Brighton, Colorado, United States (USA)51-2001992Private
Booyah AdvertisingDenver, Colorado, United States (USA)51-2002001Private
SpotX (now part of Magnite)Denver, Colorado, United States (USA)501-10002007Corporate
N-Compass TVLakewood, Colorado, United States (USA)51-2002008Private
AdCellerantDenver, Colorado, United States (USA)201-5002013Private Equity
NLA MediaColorado Springs, Colorado, United States (USA)11-501996Private
Fortnight CollectiveBoulder, Colorado, United States (USA)11-502016Private
Amélie CompanyDenver, Colorado, United States (USA)11-502002Private
Assembly Media Networks, Inc.Boulder, Colorado, United States (USA)11-502015Venture Capital
StrategusEnglewood, Colorado, United States (USA)11-502014Private Equity
January SpringDenver, Colorado, United States (USA)11-502017Private
Twelve Three MediaGolden, Colorado, United States (USA)11-502009Private
Philosophy CommunicationDenver, Colorado, United States (USA)11-502001Private
Digital First Media Inc.Denver, Colorado, United States (USA)10001+2011Private
Karsh HaganDenver, Colorado, United States (USA)51-2001977Private
JemsuDenver, Colorado, United States (USA)11-502010Private
Directory PlusDurango, Colorado, United States (USA)51-2001983Private


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