The digital advertising industry in the US focuses on promoting products and services online using various platforms and technologies. This industry comprises companies of all sizes that offer solutions like search engine marketing, display advertising, and social media campaigns. With evolving consumer behavior and increasing reliance on technology, there is a significant shift towards data-driven advertising strategies and automation. Innovative technologies like AI and machine learning are particularly crucial, enhancing personalization and targeting. Companies are increasingly exploring new formats, such as video and mobile ads, to engage audiences in meaningful ways, leading to a dynamic advertising landscape.

This list features 23 notable digital advertising companies based in the US. The companies vary in size, with some employing thousands of staff while others operate with smaller teams. They were founded at different times, ranging from the mid-1990s to the 2010s. Specializations include search marketing, performance advertising, and creative media solutions. Notable headquarters locations such as Silicon Valley and New York City highlight the concentration of talent in these hubs. Each company brings unique offerings and approaches to the digital advertising space, adding richness to the industry's evolution.

Read on to discover the top digital advertising companies in the U.S.

Top 23 Digital Advertising Companies in the US

1. Google Ads

• Website: ads.google.com
• Ownership type: Private
• Headquarters: Mountain View, California, United States (USA)
• Founded year: 1998
• Headcount: 10001+
• LinkedIn: google-ads-es

Google Ads, founded in 1998 and based in Mountain View, California, is a prominent advertising agency that specializes in online advertising solutions. The platform offers a variety of services, including search ads, display ads, video ads, and shopping ads, aimed at helping businesses improve their online presence and drive customer engagement. Google Ads utilizes advanced artificial intelligence technology to optimize ad performance, ensuring that businesses can effectively reach their target audiences. The platform also provides tools for conversion tracking and performance analysis, enabling advertisers to measure the success of their campaigns. With a focus on maximizing return on investment, Google Ads continues to play a crucial role in shaping the digital advertising industry.

2. AdRoll, a division of NextRoll

• Website: adroll.com
• Ownership type: Venture Capital
• Headquarters: San Francisco, California, United States (USA)
• Employee distribution: United States (USA) 56%, Ireland 22%, Australia 18%, Other 4%
• Latest funding: $70.0M, April 2014
• Founded year: 2007
• Headcount: 501-1000
• LinkedIn: adroll

AdRoll, a division of NextRoll, is a digital marketing agency based in San Francisco, California. Founded in 2007, the company has carved out a niche in the digital advertising space by offering a comprehensive suite of services that includes display ads, video ads, and marketing automation tools. AdRoll's platform is designed to help businesses optimize their marketing strategies through data-driven insights, enabling them to effectively engage with their target audiences. The company has a strong focus on industries such as ecommerce and finance, where it has demonstrated success in driving revenue for its clients. With a workforce of around 500 to 1000 employees and a significant presence in the United States, Ireland, and Australia, AdRoll has established itself as a key player in the digital marketing landscape. The company has also received substantial funding, with a reported last funding amount of $70 million in 2014, which underscores its growth potential and commitment to innovation in the advertising sector.

3. AppNexus

• Website: appnexus.com
• Ownership type: Corporate
• Headquarters: New York, New York, United States (USA)
• Employee distribution: United States (USA) 65%, United Kingdom (UK) 10%, Brazil 10%, Other 15%
• Latest funding: $1.6B, June 2018
• Founded year: 2007
• Headcount: 1001-5000
• LinkedIn: appnexus

AppNexus, founded in 2007 and based in New York City, operates as a prominent technology company within the digital advertising sector. Initially recognized for its demand-side platform (DSP), AppNexus provides advertisers with tools to optimize their ad campaigns through data-driven strategies. The company has played a crucial role in shaping programmatic advertising, allowing businesses to effectively target and engage their audiences across various digital channels. In 2018, AppNexus secured a significant funding round of $1.6 billion, underscoring its value in the market. Following its acquisition by Microsoft, AppNexus has been integrated into Microsoft Advertising, further expanding its capabilities and reach in the advertising ecosystem. This partnership enhances its offerings, particularly in video advertising and retail media, positioning AppNexus as a key player in the evolving digital advertising landscape.

4. Verizon Media Platform

• Website: verizonmedia.com
• Ownership type: Private Equity
• Headquarters: Los Angeles, California, United States (USA)
• Latest funding: $5.0B, May 2021
• Founded year: 2017
• Headcount: 501-1000
• LinkedIn: verizon-media-platform

Verizon Media Platform, operating under the Yahoo brand, is a media and technology company based in Los Angeles, California. Founded in 2017, it has quickly established itself as a key player in the digital advertising sector. Yahoo offers a variety of products and services, including advertising solutions, search services, and media platforms that cater to both businesses and consumers. The company connects users with content and brands, serving hundreds of millions of people globally. Yahoo Advertising focuses on providing sustainable identity, premium access, and measurable performance for advertisers. With a workforce of approximately 577 employees, Yahoo continues to evolve its offerings, including advanced ad tech solutions and partnerships that enhance its advertising capabilities. In May 2021, the company secured a substantial funding amount of $5 billion, underscoring investor confidence in its growth potential and strategic direction.

5. Xandr

• Website: xandr.com
• Ownership type: Corporate
• Headquarters: New York, New York, United States (USA)
• Employee distribution: United States (USA) 70%, India 6%, United Kingdom (UK) 6%, Other 19%
• Latest funding: December 2021
• Founded year: 2006
• Headcount: 1001-5000
• LinkedIn: xandr

Xandr, Inc., founded in 2006 and based in New York, is an advertising technology company that specializes in digital advertising solutions. The company operates a platform designed for the buying and selling of consumer-centric digital ads, catering to businesses in the advertising and marketing sectors. Xandr's services include demand-side platforms, audience targeting, and video advertising, which are crucial for advertisers looking to optimize their campaigns. As a subsidiary of Microsoft, Xandr benefits from access to vast data resources, enabling them to offer data-driven insights that enhance advertising effectiveness. With a workforce of over 300 employees, Xandr maintains a global presence, with a significant portion of its team located in the United States, along with operations in India, the UK, France, and Spain. The company has not reported any recent funding, indicating a stable operational model under Microsoft's umbrella.

6. WebFX

• Website: webfx.com
• Ownership type: Private Equity
• Headquarters: Harrisburg, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 91%, India 2%, Other 6%
• Latest funding: $4.3M, October 2021
• Founded year: 1996
• Headcount: 501-1000
• LinkedIn: webfxinc

WebFX is a digital marketing agency based in Harrisburg, Pennsylvania, founded in 1996. With a workforce of over 500 experts, the company provides a comprehensive suite of services that includes search engine optimization (SEO), pay-per-click (PPC) advertising, content marketing, and web design. WebFX is dedicated to helping businesses enhance their online visibility and increase revenue through tailored, data-driven marketing strategies. They serve clients across various industries, demonstrating their adaptability and expertise in addressing specific business needs. The agency has also received funding, with a reported amount of $4,287,500 in October 2021, which supports their growth and innovation initiatives. Their proprietary platform, MarketingCloudFX, allows clients to track marketing performance and optimize campaigns effectively, further solidifying their position in the digital marketing sector.

7. Razorfish

• Website: razorfish.com
• Ownership type: Corporate
• Headquarters: New York, New York, United States (USA)
• Employee distribution: United States (USA) 96%, Other 4%
• Latest funding: $530.0M, August 2009
• Founded year: 1995
• Headcount: 1001-5000
• LinkedIn: razorfish

Razorfish is an interactive agency based in New York City, specializing in digital marketing and technology solutions. Founded in 1995, the company has evolved to meet the changing needs of businesses in the digital age. Razorfish offers a range of services, including web development, media planning, and analytics, aimed at enhancing consumer engagement and optimizing marketing strategies. They work with various clients, helping them navigate the complexities of the digital landscape. The agency has developed expertise in key areas such as integrated brand experience, consumer and content experience, and retail and commerce experience. Their recent focus on creator-led content through the Razorfish Creator Colab reflects their commitment to staying relevant and innovative in the industry. Razorfish has also received significant funding, amounting to $530 million, which underscores investor confidence in their business model and growth potential.

8. Rakuten Marketing

• Website: rakutenmarketing.com
• Ownership type: Private
• Headquarters: San Mateo, California, United States (USA)
• Founded year: 1996
• Headcount: 501-1000
• LinkedIn: rakuten-marketing

Rakuten Marketing, now operating under the name Rakuten Advertising, is a marketing consultancy based in San Mateo, California. Founded in 1996, the company has grown to employ around 855 individuals. It specializes in performance-driven advertising solutions, offering a range of services that include affiliate marketing, influencer marketing, and digital media solutions tailored for brands and publishers. Rakuten Advertising focuses on connecting advertisers with the right partners, optimizing marketing strategies to enhance audience engagement and campaign performance. The company has made a significant impact in the digital advertising industry, leveraging advanced data analytics and artificial intelligence to improve marketing outcomes. Their commitment to performance is evident in their extensive client base, which includes top global brands, and their recognition through various industry awards for their innovative marketing solutions.

9. UM Worldwide

• Website: umww.com
• Ownership type: Private
• Headquarters: New York, New York, United States (USA)
• Employee distribution: United States (USA) 42%, United Kingdom (UK) 5%, Colombia 5%, Other 48%
• Founded year: 2009
• Headcount: 1001-5000
• LinkedIn: um-ww

UM Worldwide, also known as Universal McCann, is an advertising agency based in New York City, founded in 2009. The company specializes in media planning and buying, brand strategy, and digital marketing solutions. With a workforce of over 2,500 employees, UM operates in more than 100 markets worldwide, leveraging data-driven insights to enhance brand visibility and effectiveness. They have built a reputation for empowering brands to reach their full growth potential through innovative strategies and a commitment to understanding the complexities of the media landscape. UM has worked with a range of prominent clients, including American Express, Johnson & Johnson, and CVS Health, and has received numerous industry accolades, such as being named Ad Age A-List US Media Agency of the Year. Their focus on community, courage, and curiosity reflects their approach to fostering creativity and collaboration within the advertising space.

10. 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, helping them navigate the complexities of digital marketing through an intuitive platform. Choozle's offerings include a variety of advertising channels such as display, video, audio, connected TV, and social media, allowing clients to optimize their advertising strategies effectively. With a focus on transparency and control, Choozle empowers its users to manage their campaigns with real-time insights and analytics. The company has successfully delivered over 97,000 campaigns since its inception, showcasing its experience and capability in the industry. In May 2021, Choozle secured $15 million in Series C funding, further solidifying its position in the market and enabling continued growth and innovation in its service offerings.

11. Mediamond

• Website: mediamond.it
• Ownership type: Private
• Headquarters: United States (USA)
• Employee distribution: Italy 100%
• Founded year: 2009
• Headcount: 51-200
• LinkedIn: mediamond

Mediamond S.p.A. is an advertising agency based in Italy, operating under the umbrella of Mondadori and Mediaset. Founded in 2009, the company has grown to employ around 150 individuals. Mediamond specializes in providing comprehensive advertising solutions that span digital, print, and out-of-home media. They cater to brands and businesses aiming to boost their visibility and engagement through tailored advertising strategies. The agency has expanded its offerings to include programmatic advertising, as evidenced by their recent partnership with Adomik, which aims to enhance the efficiency of digital campaign management. Mediamond's portfolio includes a variety of media formats, such as native, display, video, mobile, and digital audio, alongside traditional print and out-of-home advertising. Their strategic focus on integrating technology into their advertising solutions reflects a modern approach to meeting client needs in a rapidly evolving market.

12. The Patriot-News

• Website: thepamediagroup.com
• Ownership type: Private
• Headquarters: Mechanicsburg, Pennsylvania, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 2013
• Headcount: 201-500
• LinkedIn: the-patriot-news

The Patriot-News, part of PA Media Group, is an advertising agency based in Mechanicsburg, Pennsylvania. Founded in 2013, the company has grown to employ between 201 and 500 individuals. It specializes in providing marketing solutions tailored to various sectors, including education, healthcare, recruitment, and travel. The agency employs a data-driven approach to enhance brand visibility and engagement for its clients. Their services range from SEO and PPC advertising to content marketing and video production, showcasing their capability in both digital and traditional advertising. Operating primarily in the Mid-Atlantic region, The Patriot-News aims to empower businesses and communities through effective marketing strategies. They also produce insightful content through their Marketing Mixtape newsletter, which highlights trends and strategies in marketing and advertising.

13. Skai

• Website: skai.io
• Ownership type: Venture Capital
• Headquarters: San Francisco, California, United States (USA)
• Employee distribution: Israel 44%, United States (USA) 39%, United Kingdom (UK) 8%, Other 9%
• Latest funding: January 2016
• Founded year: 2006
• Headcount: 501-1000
• LinkedIn: skaicommerce

Skai, founded in 2006 and based in San Francisco, California, is a digital marketing agency that specializes in omnichannel marketing solutions. The company offers a comprehensive suite of services, including retail media, search, social media, and app marketing, aimed at helping businesses optimize their advertising strategies. Skai's platform leverages advanced AI technology to provide insights and enhance campaign performance, allowing clients to make informed decisions about their media investments. With a workforce of approximately 703 employees, Skai has a significant presence in the industry, with a notable distribution of talent across Israel, the United States, the United Kingdom, and Ukraine. Their commitment to innovation and client success is evident through their various expert services and educational resources, such as Skai University, which helps clients maximize their investment in the platform. Skai's focus on consolidating multiple publishers and retail media networks into a single platform reflects their understanding of the complexities of modern advertising, making them a relevant player in the digital marketing arena.

14. Cox Media

• Website: coxmedia.com
• Ownership type: Private
• Headquarters: Atlanta, Georgia, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1981
• Headcount: 501-1000
• LinkedIn: cox-media

Cox Media, based in Atlanta, Georgia, is a marketing agency founded in 1981. With a workforce of approximately 969 employees, the company specializes in multichannel advertising solutions that integrate both digital and traditional media. Their services include comprehensive research and planning, creative development, execution, and optimization of advertising campaigns. Cox Media serves a wide array of clients, including small and medium businesses, national brands, and agency partners, helping them enhance their marketing strategies and effectively reach their target audiences. The company is committed to providing tailored advertising solutions that leverage data insights and analytics, ensuring that clients can connect with their desired audiences efficiently. Cox Media's approach is characterized by collaboration and transparency, as they work closely with clients to develop customized media plans that align with specific business goals.

15. Ruckus Marketing

• Website: ruckusmarketing.com
• Ownership type: Private
• Headquarters: New York, New York, United States (USA)
• Founded year: 2005
• Headcount: 11-50
• LinkedIn: ruckus-marketing

Ruckus Marketing is a New York-based advertising agency that specializes in digital marketing and creative services. Established in 2005, the company has built a reputation for enhancing brand visibility and engagement through innovative strategies. Ruckus offers a range of services, including branding, marketing campaigns, and trade show management, catering to clients across various sectors such as automotive, beauty, and technology. The agency prides itself on its results-driven approach, focusing on measurable outcomes that align with client goals. Ruckus has worked with notable clients like BMW, Crayola, and Mobileye, demonstrating its capability to handle high-profile projects. The agency's work has garnered industry recognition, including an Emmy Award for branded content, highlighting its creative prowess and effectiveness in the digital marketing arena.

16. Flashtalking (Merged with Innovid)

• Website: flashtalking.com
• Ownership type: Corporate
• Headquarters: New York, New York, United States (USA)
• Employee distribution: United States (USA) 54%, United Kingdom (UK) 28%, Germany 6%, Other 12%
• Latest funding: $500.0M, July 2021
• Founded year: 2001
• Headcount: 201-500
• LinkedIn: flashtalking-inc-

Flashtalking, now part of Innovid, is an advertising technology firm based in New York City, founded in 2001. The company specializes in creative personalization and intelligence across multiple marketing channels. They offer a suite of solutions that includes AI-driven advertising, audience identity services, and creative production. These tools are designed to help global advertisers and agencies optimize their marketing efforts effectively. Flashtalking has a strong presence in the industry, serving clients across various sectors such as automotive, retail, and travel. The company has also secured substantial funding, amounting to $500 million as of July 2021, which underscores its growth trajectory and commitment to innovation in the advertising space.

17. Kargo

• Website: kargo.com
• Ownership type: Private
• Headquarters: New York, New York, United States (USA)
• Employee distribution: United States (USA) 81%, Ireland 7%, Australia 5%, Other 7%
• Founded year: 2003
• Headcount: 201-500
• LinkedIn: kargo

Kargo is an advertising technology company based in New York, founded in 2003. With a workforce of around 201-500 employees, Kargo specializes in crafting innovative advertising solutions tailored for brands across mobile, CTV, and social media platforms. The company focuses on enhancing advertising effectiveness, targeting precision, and user engagement, which are critical for businesses aiming to optimize their marketing strategies. Kargo has established itself as a significant player in the digital advertising space, particularly noted for its commitment to quality and premium inventory. They are recognized for their unique ad formats and advanced targeting capabilities, which leverage AI to deliver messages with high accuracy. Kargo's approach includes a strong emphasis on brand safety and fraud prevention, making it a trusted partner for advertisers. Their recent initiatives and partnerships indicate a proactive stance in adapting to the evolving digital landscape, further solidifying their relevance in the industry.

18. Aleph Group, Inc

• Website: alephholding.com
• Ownership type: Private Equity
• Headquarters: Miami, Florida, United States (USA)
• Employee distribution: Argentina 11%, Egypt 7%, India 6%, Other 76%
• Latest funding: February 2022
• Founded year: 2005
• Headcount: 1001-5000
• LinkedIn: aleph-holding

Aleph Group, Inc., founded in 2005 and based in Miami, Florida, is a digital advertising agency that specializes in providing advertising, technology, and payment solutions to businesses. With a workforce of approximately 1,839 employees, the company operates in over 140 markets worldwide. Aleph Group assists advertisers and agencies in navigating global digital platforms, enabling them to reach consumers effectively. Their services include proprietary technology for campaign management and solutions for cross-border payments, making digital advertising accessible in more than 50 currencies. The company has formed strategic partnerships with major digital platforms, such as TikTok and Pinterest, to expand their reach and enhance their service offerings. Aleph Group also emphasizes education in digital media, providing programs to certify and connect the next generation of digital marketing professionals. This focus on technology and education, combined with their global presence, underscores their active role in the digital advertising industry.

19. Nexstar Digital

• Website: nexstardigital.com
• Ownership type: Private
• Headquarters: United States (USA)
• Founded year: 2017
• Headcount: 201-500
• LinkedIn: nexstardigital

Nexstar Digital is a media company based in the United States, specializing in digital marketing and advertising solutions. Founded in 2017, it operates a vast network of 125 websites and 239 mobile apps, delivering premium content and targeted advertising to businesses across various industries. The company is part of Nexstar Media Group, which owns 200 local broadcast stations in 116 U.S. markets. This extensive reach allows Nexstar Digital to connect with 106 million highly engaged digital consumers each month. Their services include display advertising, video marketing, content marketing, search engine marketing, and social media advertising, all designed to help clients optimize their media spend and achieve their marketing goals. With a team of experts in data science and advertising technology, Nexstar Digital develops custom solutions that drive results for both national and local brands. Their focus on innovative advertising technologies and audience engagement positions them as a significant player in the digital advertising industry.

20. GroundTruth

• Website: groundtruth.com
• Ownership type: Private
• Headquarters: New York, New York, United States (USA)
• Employee distribution: India 53%, United States (USA) 46%
• Founded year: 2009
• Headcount: 201-500
• LinkedIn: groundtruthco

GroundTruth is a New York-based media platform founded in 2009, specializing in targeted advertising solutions that drive in-store visits and measurable business results. With a workforce of approximately 358 employees, the company operates primarily in the United States and India. GroundTruth offers a range of services, including audience targeting, location targeting, and creative services, primarily serving businesses in sectors such as retail and automotive. Their proprietary technology, Blueprints, enables them to map real-world behaviors and measure the effectiveness of advertising campaigns, providing clients with insights into consumer actions. GroundTruth's innovative approach to advertising, which includes a self-serve platform and managed services, allows clients to engage with their target audiences across multiple media channels, including mobile, desktop, and digital out-of-home. The company has not reported any recent funding, indicating a stable operational model without reliance on external investment.

21. Kobe Digital

• Website: kobedigital.com
• Ownership type: Corporate
• Headquarters: Los Angeles, California, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: February 2022
• Founded year: 2016
• Headcount: 11-50
• LinkedIn: kobe-digital

Kobe Digital is a digital marketing agency based in Los Angeles, California, founded in 2016. The company specializes in performance marketing, web design, and video production, providing integrated marketing solutions that enhance online presence and drive engagement for its clients. With a team of experts, Kobe Digital focuses on delivering measurable results through innovative strategies tailored to client needs. They have worked with a variety of clients, including startups and established enterprise brands, showcasing their ability to cater to different business requirements. Their services include social media advertising, search engine marketing, and video content production, which are essential components of modern digital advertising. Kobe Digital's commitment to understanding client objectives and creating effective marketing campaigns positions them as a relevant player in the digital advertising sector.

22. Thrive Internet Marketing Agency

• Website: thriveagency.com
• Ownership type: Private
• Headquarters: Dallas, Texas, United States (USA)
• Employee distribution: United States (USA) 76%, South Africa 11%, Canada 2%, Other 10%
• Founded year: 2005
• Headcount: 51-200
• LinkedIn: thrive-agency

Thrive Internet Marketing Agency, based in Dallas, Texas, is a private digital marketing agency that has been operational since 2005. With a workforce of around 202 employees, the agency specializes in a wide array of services designed to enhance online visibility and drive business growth. Their offerings include search engine optimization (SEO), pay-per-click (PPC) advertising, social media marketing, and web design, among others. Thrive has worked with clients across various sectors, tailoring their strategies to meet specific business needs. The agency prides itself on its commitment to ethical practices and customer satisfaction, often highlighted in client testimonials. Their focus on measurable outcomes, such as increased traffic and engagement, showcases their effectiveness in the digital marketing arena. Thrive's approach combines creativity with data-driven strategies, ensuring that clients receive personalized service aimed at achieving tangible results.

23. Undertone by Perion

• Website: undertone.com
• Ownership type: Corporate
• Headquarters: New York, New York, United States (USA)
• Employee distribution: United States (USA) 89%, Ukraine 8%, Other 3%
• Latest funding: $180.0M, December 2015
• Founded year: 2002
• Headcount: 201-500
• LinkedIn: undertone

Undertone by Perion, founded in 2002 and based in New York City, is a digital advertising agency that specializes in high-impact advertising solutions. The company offers a comprehensive suite of services, including Display, Video, Connected TV (CTV), Digital Out-Of-Home (DOOH), and Audio advertising. Their approach combines advanced technology with creative strategies to effectively connect brands with their target audiences. Undertone's focus on personalization and dynamic content allows them to deliver tailored advertising experiences that engage consumers across multiple platforms. They also emphasize data integration and targeting solutions, which enhance campaign performance and effectiveness. With a workforce of around 196 employees, the company has a strong presence in the U.S. market, complemented by a small team in Ukraine. Their innovative solutions, such as the Uplift Collective, highlight their commitment to social good and responsible advertising practices. This initiative connects advertisers with diverse publishers while supporting charitable causes, showcasing Undertone's dedication to making a positive impact in the advertising industry.

Digital Advertising Insights: Key Companies in the US

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