Best Free Demand-Side Platforms (DSP) of 2025

AdLib: The Premium Demand Side Platform For Everyone Reach your audience on the world's most popular sites, apps, and streaming platforms. No Contracts. No Minimums. Most marketers struggle to access premium programmatic advertising platforms because of high barriers to entry and complexities that demand a lot of your time and resources. AdLib removes those barriers and complexities allowing you to easily set up and launch successful programmatic campaigns at scale across all channels. The AdLib DSP AdLib offers marketers an easy way to access premium audiences and publishers at scale and across all channels while eliminating the wasted time and money typically spent figuring out the complexities of programmatic marketing. Manage More Campaigns, Drive Better Outcomes, And Spend Less Time Doing It All! Campaigns -Launch In Less Than 60 Seconds -Maximize Brand Awareness & Growth Magic Ads -Clean, Modern, & Authentic Ad Builder -Outperform Branded Ads by 2x Dashboard -24x7 Real-Time Reporting -Actionable Metrics & Deep Insights

ad:personam, a self-serve DSP, is built on the Xandr Microsoft DSP API and offers a solution for programmatic marketing to small businesses, startups, or agencies. It breaks down financial barriers by allowing everyone to access programmatic advertising. The platform offers a variety of programmatic purchasing solutions, such as Contextual Targeting and Audience Target Groups. It also offers Connected TV, Video & Audio Campaigns, Retargeting, and Video & Audio Campaigns. The platform supports a variety of creative ad formats, including GIF, JPEG and PNG files, HTML5, audio and video files. Integrating with Google Looker allows for real-time dashboards and reporting. The Smart Templates feature ensures swift campaign setup, while built-in fraud detection and site whitelisting/blocklisting tools ensure authentic ad interactions. Ad:personam also offers access to global data and inventory providers, including video, audio and CTVs. This opens the door to premium audiences and sites.

Within the Pontiac Intelligence console, you can create audiences that are highly customizable based on unique device IDs linked to smartphones. You have the flexibility to include numerous specific details when defining your audience. Pontiac Intelligence provides access to an extensive library of over 350,000 audience segments that can be seamlessly integrated into your marketing campaigns. You can also connect a comprehensive range of third-party audiences to enhance your targeted efforts. If you're aiming to reach individuals who have shown interest in various activities or lifestyles through their online behavior, our thousands of behavioral segments can help you achieve that. For example, you can target job seekers in the entertainment sector, individuals searching for school supplies, or those earning between $50,000 and $75,000 annually. Additionally, you might want to reach consumers interested in specific products, like teeth-whitening strips. With pre-packaged audiences readily available, you can efficiently tailor your campaigns to meet your specific marketing goals and objectives. The possibilities for audience segmentation are virtually limitless, allowing for highly effective targeting strategies.

DecenterAds serves as a demand-side platform tailored for direct advertisers and agencies. This innovative platform is specifically built to enhance programmatic operations, allowing for efficient real-time bidding (RTB) trading while connecting advertisers and publishers across the globe in accordance with IAB standards. Additionally, DecenterAds presents an economical solution that includes robust billing support along with clear and immediate reporting features. By leveraging advanced Machine Learning Technology, the platform empowers users to develop their digital advertising ventures within the expansive programmatic landscape. This adaptability ensures that businesses can optimize their advertising strategies effectively.

iion serves as a comprehensive platform for game advertising, linking brands with game publishers across various gaming environments. This platform empowers advertisers to launch smooth ad campaigns via a self-service interface, facilitating interaction with audiences not only within games but also in their surrounding and broader contexts. For publishers, iion's fusiion solution enhances revenue potential by granting access to high-quality branded ads through international partnerships, which results in elevated CPMs. It bolsters in-game advertising by seamlessly embedding brands into the gaming experience, while also offering placements around and outside of games, thereby increasing exposure. The recent collaboration with PubMatic's OpenWrap further enriches monetization avenues for gaming publishers by broadening their advertiser network. iion is dedicated to streamlining game advertising by consolidating campaigns throughout the gaming experience, thereby equipping brands with innovative and effective engagement strategies. This commitment not only optimizes advertising efforts but also elevates the overall user experience in gaming.