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The AdTech market continues to grow rapidly: according to Grand View Research, it is projected to reach a revenue of US$ 371.1 billion by 2030 in the United States1. And New York City remains one of the most dynamic AdTech hubs, home to companies shaping the future of programmatic advertising, CTV, and data-driven marketing.
As the ecosystem is expanding, how do you identify the right partner? We’ve compiled a list of top Ad Tech companies NYC (New York) has that are worth watching based on their innovation, market presence, notable partnerships, and industry recognition.
This research is backed by Oxagile’s deep experience providing AdTech software development services that manifests in dozens of projects around yield maximization, ad platform enhancement, ad buying and selling optimization, reputation management, and more.
Key takeaways:
Now, let’s delve deeper into who’s worth considering among the best Ad Tech companies NYC has to offer.
A regular member on the Inc. 5000 list, Oxagile is a full-cycle AdTech software development company with 20+ years of experience at the intersection of advertising, video streaming, and data-driven technologies. The company partners with AdTech vendors, broadcasters, publishers, and agencies to design and scale high-performance advertising ecosystems.
Oxagile specializes in building and enhancing core AdTech infrastructure, including DSPs, SSPs, ad exchanges, and custom analytics platforms, with a strong focus on programmatic and video advertising. Core expertise includes:
What sets Oxagile apart is its deep cross-domain expertise in AdTech, OTT/CTV, AI, and big data, letting it deliver scalable, privacy-compliant solutions and tackle challenges like cookieless targeting and cross-channel attribution. The company helps businesses maximize ROAS, streamline operations, and unlock new revenue streams.
A leading location-based marketing and AdTech company with over $158 million in funding and recognized four years in a row as one of Ad Age’s Best Places to Work, GroundTruth offers a range of geo-contextual omnichannel products and services that help brands, agencies, small businesses, and non-profit organizations reach consumers in the right place and at the right time.
With the logo “Delivering trust and transparency to the markets of tomorrow” and trusted by top-notch brands like IPG, Brave, and Nexstar Media Group, this New York-based AdTtech company brings financial exchange technology to advertising. After withdrawing its IPO in early 2025, NYIAX continues to innovate in the space with a proprietary platform that enables advertisers to trade inventory similarly to financial contracts.
Contracts negotiation, purchasing, management, reconciliation — all this is performed automatically, which reduces manual processes and discrepancies. The solution provides rock-solid security, unmatched efficiency, and transparency across all transactions, no matter the scale or complexity. Moreover, by sparing the need to look for third-party intermediaries, NYIAX allows slashing friction and fees, while boosting ROI.
With nearly 500 employees globally and now led by CEO Dave Helmreich (appointed in 2025), TripleLift continues to reinvent ad placement at the intersection of creative, media, and data. The company creates native ads that automatically match the content environment of publisher websites.
Their real-time bidding marketplace serves the world’s top publishers, streaming companies, brands, and demand-side platforms — with over 1 billion premium impressions and more than 1 trillion ad transactions monthly.
Moreover, the company leverages its in-house computer vision tool to detect elements like faces, objects, and text areas to automatically edit the image format and adapt the ad to different devices.
A global expert in social advertising, named a Leader in Creative Advertising Technologies in 2024 by Forrester, Smartly.io provides a platform that combines media buying, creative, and data to automate digital campaigns.
In 2025, the company hosted its flagship ADVANCE event in New York, reaffirming its commitment to innovation. With €2.5B in ad spend, Smartly.io maximizes performance and unlocks creativity for over 650 brands, including Uber, TechStyle, and eBay.
The company’s combination of media buying and creative automation spares marketers the need for manual operations, helping to focus on what matters most. Smartly.io’s proprietary tools enable advanced personalization and scalability across social channels, which drives considerable ROAS maximization.
Moreover, Smartly.io leverages predictive algorithms to automatically optimize creatives, targeting, bidding, and budgets.
Leverage Oxagile’s domain expertise to create, modernize, or scale your advertising platform.
One of the top ad tech companies NYC has, Sonobi strives to convert traditional impression-based advertising to individual-based advertising. The company currently operates with around 50 employees across four continents, and its proprietary JetStream platform continues to unite comScore’s top 250 premium media properties with Fortune 500 advertisers.
It also provides:
With a global reputation for innovation, The Trade Desk stands out as one of the most influential Ad Tech companies NYC has on its arena today. Known for its high-profile partnerships with leading brands and agencies, the company operates a cutting-edge demand-side platform (DSP) that enables precise audience targeting across display, video, audio, native, and connected TV.
Driven by consistent revenue growth and a commitment to transparency, The Trade Desk has earned widespread recognition for its strategic initiatives — including Unified ID 2.0, a privacy-focused identity framework for the open internet. In 2023, it introduced Kokai, an AI-powered decisioning engine that helps advertisers optimize performance in real time.
Mediaocean is a long-established AdTech company with a strong presence in New York and over 20 offices worldwide. It supports more than $150 billion in annual media spend, providing tools for media planning, buying, ad serving, creative personalization, and performance measurement across channels.
In 2025, Mediaocean completed the integration of Innovid and Flashtalking, consolidating its position as a full-service platform for omnichannel advertising. This move enabled deeper support for CTV, dynamic creative optimization, and cross-platform analytics — within a single ecosystem.
The company works with brands, agencies, and media owners to help simplify campaign management and improve transparency across the advertising workflow. Clients include global advertisers such as Honda, Mondelez, and Whirlpool.
Following its $324 million acquisition of AdTheorent in 2024, Cadent solidified its position as a top player in convergent TV advertising. With a footprint spanning 90 million households, Cadent bridges the gap between linear and digital to help brands reach broad audiences.
Doug Rozen, former Dentsu and Horizon executive, was appointed President in 2025, further reinforcing the company’s vision for advanced analytics and addressable video at scale. Cadent’s platform now powers expanded capabilities in measuring ROAS, penetration lift, and foot traffic.
StackAdapt is a programmatic advertising company with a growing presence in New York and offices across North America. Known for its intuitive DSP and cross-channel capabilities, it helps brands and agencies run campaigns across native, video, connected TV (CTV), audio, and digital out-of-home (DOOH).
The company’s platform focuses on privacy-friendly targeting and machine learning optimization, enabling marketers to reach relevant audiences without relying on third-party cookies. Its easy-to-use interface, transparent reporting, and strong customer support have earned it consistent recognition on platforms like G2, where it was named one of the Top 50 Software Products of 2025.
StackAdapt works with clients of all sizes, offering flexible campaign management for both performance-driven and brand awareness goals.
Choosing between top AdTech companies in New York depends on your goals and the level of complexity you’re dealing with. Many AdTech companies offer ready-made platforms that are a good fit for standard campaigns and quick launches.
At the same time, more complex tasks, such as custom integrations or specific data requirements, may require a tailored solution. In such cases, businesses often need partners capable of building or extending core AdTech infrastructure, such as DSPs, SSPs, CTV solutions, or advanced analytics systems, as relying solely on off-the-shelf tools won’t be enough.
The companies listed above cover different areas, from programmatic and CTV to analytics and campaign management. Understanding these differences can help you choose the right option for your needs.
If standard platforms don’t fully meet your requirements, custom AdTech software development may be worth considering. It allows you to build or improve an advertising solution based on your specific workflows and goals.
Tell us about your idea, and we’ll map out the most effective route to bring it to life.
1. Grand View Research — U.S. AdTech Market Outlook
The largest AdTech companies headquartered in New York include The Trade Desk, Mediaocean, Smartly.io, and TripleLift. There are also companies like Oxagile that operate globally, work with major brands and agencies, and manage large-scale advertising operations.
Several New York-based companies focus on programmatic advertising, including The Trade Desk, StackAdapt, Sonobi, Oxagile, and TripleLift. They provide solutions for automated media buying, real-time bidding, and audience targeting across channels like CTV and video.
Among AdTech companies in New York City, The Trade Desk and StackAdapt are known for their DSP capabilities, letting advertisers manage and optimize campaigns across multiple channels. On the SSP side, companies like Sonobi, Oxagile, and TripleLift help publishers manage inventory and improve monetization.
