List of the Top 4 CTV & OTT Advertising Platforms for Amazon Transparent Ad Marketplace (TAM) in 2025

Leading the way in digital marketing, OpenAudience facilitates the engagement of every adult with an online presence across multiple devices, screens, and households on the open web. This cutting-edge platform acts as a groundbreaking solution for people-based marketing, providing distinctive features that improve advertising effectiveness and ease of use throughout the expansive open web landscape. Built on three core principles, it emphasizes a privacy-first approach while seamlessly incorporating data with exceptional accuracy and precision. This empowers brands to uncover authentic insights into their customers and target audiences, ultimately enhancing advertising performance and maximizing returns. With its unparalleled reach into the open web, OpenX boasts unmatched expertise in navigating this digital arena, drawing on over a decade of experience managing the industry's largest and most esteemed independent ad exchange for substantial impact. Consequently, marketers can adeptly maneuver through the intricacies of digital advertising, harnessing the full potential of a strong and efficient platform, thereby setting themselves up for sustained success in their campaigns.

SpotX offers a unified platform that brings together television, Over-the-Top (OTT), and digital video advertising to maximize efficiency in the complex video ad landscape. This all-encompassing video ad serving solution is crafted to help publishers optimize their workflows while enhancing their profitability. By consolidating multiple demand sources, SpotX enables users to increase revenue through a seamless interface. The platform automates the sales process for video inventory, ensuring total transparency and safeguarding brand integrity across various devices. It allows for the utilization of unique first- and third-party audience data within a secure environment, thus augmenting the value of your inventory. Collaborating with SpotX’s Customer Success Team permits the customization of your video strategy in alignment with your unique key performance indicators (KPIs). Additionally, the platform's connections on the buy-side help refine inventory offerings, striving for the best fill rates and yield. With access to premium supply from SpotX Managed Services Team or programmatic demand-side partners, users can confidently make purchasing decisions backed by insights and assistance from a dedicated Account Team. Furthermore, the platform’s flexibility in adapting to market fluctuations guarantees that your advertising approach stays effective and pertinent as trends evolve, ensuring long-term success. As a result, SpotX empowers businesses to stay ahead in the dynamic advertising landscape.

Magnite is recognized as the leading independent platform for sell-side advertising in the world. We are dedicated to supporting your success across diverse channels and formats, customized to fit your unique requirements. Our strategy is distinctly collaborative; instead of competing with you, we partner with you, granting you full access to our advanced technology and knowledgeable teams who help you stay ahead in the market. With our extensive experience, we provide invaluable insights, while our independence guarantees that you receive impartial guidance without any hidden fees or obstacles, allowing your investments to yield greater returns. By collaborating with us, you benefit from our expansive global presence, strong brand protection, and sophisticated tools designed to connect you with your target audiences, regardless of their location. Magnite (NASDAQ: MGNI) combines the programmatic strengths of Rubicon Project with the streaming capabilities of Telaria, allowing publishers to effectively monetize their content across various platforms, such as desktop, mobile, audio, and connected TV. This all-encompassing approach ensures that content creators can fully realize their revenue potential while crafting engaging experiences for their audiences, ultimately fostering a thriving ecosystem for both advertisers and publishers alike.

By placing the needs of publishers at the forefront, we enable our clients to fully realize the potential of their digital assets while providing marketers with straightforward access to high-quality inventory. Our dedication to tackling the most pressing challenges in the sector has established us as frontrunners in sell-side innovation throughout the years. We offer vital audience insights and sophisticated machine-learning algorithms that enhance monetization across a variety of devices, channels, and ad formats. PubMatic has created a global framework aimed at fostering meaningful connections among consumers, content, and brands on a large scale. It is essential to equip you with the necessary tools for making informed and strategic decisions. Our product vision strives to furnish clients with a holistic advertising technology stack. Additionally, we have crafted a flexible system where each component can be customized and expanded to address specific requirements. This adaptability not only ensures that our clients can keep pace with the rapidly changing environment but also empowers them to seize new opportunities for growth and success. The future of advertising is not just about technology; it's about creating lasting partnerships that drive mutual success.