Top 21 Supply Side Platforms (SSP) SaaS Companies in May 2026

Toronto, Ontario, Canada

Index Exchange is a global advertising supply-side platform enabling media owners to maximize the value of their content on any screen. As a trusted partner and ally, we connect leading experience makers with the world’s largest brands to ensure a quality experience for consumers. We’re a proud industry pioneer with over 20 years of experience accelerating the ad technology evolution. With our radically transparent business practices and dedication to total market efficiency, we’re committed to upholding the integrity of the programmatic ecosystem at large. Our global teams are dedicated to driving industry standards and building technology that delivers scale, efficiency, and long-term value for our customers and partners.

Widnes, Cheshire, United Kingdom

GRV Media is a leading UK publisher & ad-tech provider focused primarily on sports and entertainment, with a network of over 70 sites. They specialize in Header Bidding and revenue optimization services.

London, England, United Kingdom

Admixer Technologies is a global player in Ad Tech industry, providing SSP and DSP capabilities and complementary SaaS solutions for all parts of the programmatic ecosystem. Admixer product ecosystem includes: - Admixer.DSP - Admixer.SSP - Admixer.Publisher (SaaS Adserver for sites and mobile apps owners) - Admixer.Network (Enterprise SaaS solution to run different kinds of ad networks) - Admixer.DMP - Admixer.Creatives (Adserver for Advertisers and Creatives Management Platform) - Player.Best (HTML5 Video\Audio player with integrated monetization) All Admixer ecosystem products complement each other and so provide additional advantages and enhanced functional capacity right up to the single interface. Established in 2008 with HQ London, Admixer has offices in Ukraine, Kazakhstan, Russia, Belarus, Georgia, Latvia, and Moldova. Admixer is an official reseller of Google, Viber, InMobi, Facebook, AppNexus, and other market leaders. In 2018 Admixer, as a company, became an IAB

Lewes, Delaware, United States

Adtelligent is a global advertising technology company offering in-house solutions that help online media companies, digital sales houses, and ad networks effectively monetize web and app inventory. Supporting the full ad ecosystem, Adtelligent provides tools to manage SSP and DSP partnerships, along with a Retail Media Ad Server, Dynamic Ad Insertion (DAI) Server, and solutions for DOOH advertising. The platform also integrates telecom operator data via secure data clean rooms, enabling privacy-first, data-driven targeting. Adtelligent unique business approach delivers cutting-edge advertising technologies to more than 50,000 publishers globally, helping them facilitate revenue growth and capitalize on the digital advertising market.