Supply Side Platform (SSP)

Adello is a mobile marketing technology company that originated as an early mobile ad network in 2008 and has since grown into a full-scale MarTech company.

AppNexus was an American multinational technology company that operated a cloud-based software platform enabling and optimizing programmatic online advertising, founded in 2007 by former Right Media staff, CTO Brian O'Kelley, and Mike Nolet.

Google Ad Manager is a digital ad management platform launched by Google in 2018, combining the capabilities of two former DoubleClick products — DoubleClick for Publishers and DoubleClick Ad Exchange — into a unified service.

Improve Digital is an advertising technology company that provides a range of online advertising-related services to both sell-side and demand-side partners.

Magnite is an American online advertising technology company based in Los Angeles, California, formed through a merger of Rubicon Project and Telaria in 2020.

Media.net is a contextual advertising network and one of the top five largest pure-play ad technology companies worldwide.

Microsoft Monetize is a premium supply-side platform (SSP) and monetization solution for publishers, enabling them to maximize ad revenue across display, video, native, and connected TV inventory.

PubMatic is a digital advertising technology company that develops and implements online advertising software and strategies for publishers and advertisers.

Rubicon Project, now operating as Magnite, was an American online advertising technology firm based in Los Angeles, California, formed through a merger with Telaria in 2020.

Adform is a global digital advertising technology company offering a fully integrated stack that includes a demand-side platform (DSP), supply-side platform (SSP), and data management platform (DMP), specializing in real-time programmatic marketing automation.

Amazon Publisher Services (APS) is a suite of cloud-based tools and services that brings together solutions built by Amazon to help web and app publishers build, grow, and monetize their digital businesses.

Disney Real-Time Ad Exchange (DRAX) is a proprietary programmatic advertising platform launched by The Walt Disney Company in March 2021, designed to automate ad sales and democratize access to Disney's premium video inventory.

Equativ is a French advertising technology company that provides a vertically integrated platform — encompassing an ad server, a supply-side platform (SSP), and a demand-side platform (DSP) — serving both advertisers and publishers, with particular focus on Advanced TV and premium publishers.

Index Exchange is an independent supply-side platform that helps media owners connect with leading brands, operating as a neutral, conflict-free exchange to advance efficiency, transparency, and quality across the programmatic ecosystem.

JW Player was a leading video streaming and data insights platform that merged with Connatix to form JWP Connatix, the industry's most comprehensive independent video technology and monetization platform for broadcasters, publishers, and advertisers.

Kargo is an advertising technology company that engineers technology to forge connections between brands and consumers.

LiveRail was a video advertising technology platform focused on helping publishers maximize revenue while offering advertisers high-quality, targeted inventory, and it has since shut down as a standalone entity.

Microsoft Curate is a programmatic advertising product from Microsoft Advertising that addresses key challenges faced by both buyers and sellers in the modern digital ecosystem.

AdGear was a programmatic advertising technology platform providing ad serving, SSP, and DSP solutions, acquired by Samsung Ads in 2016.

Pioneering SSP founded 2007. Acquired by Google December 2 2011 for $400M, then shut down by Google ~2013. Featured prominently in 2024 DOJ ad-tech antitrust trial as evidence of Google's anti-competitive acquisitions.

Adomik is a publisher revenue intelligence and yield optimization platform that helps digital publishers maximize their programmatic advertising revenue. The platform provides analytics, benchmarking, and optimization tools that give publishers visibility into their auction dynamics, pricing strategies, and demand partner performance. It is widely used by premium European publishers to improve SSP and ad exchange monetization.

Adtelligent is a specialized advertising technology company that operates as a comprehensive programmatic advertising solutions provider serving both publishers and advertisers in the digital advertising ecosystem. The company has built its platform on advanced header bidding technology, real-time bidding capabilities, and sophisticated programmatic advertising infrastructure designed to simplify the complexity of digital advertising while maintaining transparency and control for clients navi...

Beachfront is a connected TV and video advertising platform providing SSP, ad serving, and programmatic solutions for streaming media companies. The company enables publishers to monetize CTV and OTT inventory while offering advertisers access to premium video inventory.

Toronto-based ad-network founded 2001. Rebranded to Index Exchange January 28 2015. Andrew Casale took CEO role at the rebrand.

E-Planning is a Latin American ad tech company providing ad serving, programmatic, and yield management solutions for publishers and advertisers. The platform offers a full-stack ad tech solution including SSP, ad server, and header bidding capabilities with strong presence in LatAm markets.

EMX Digital is a supply-side platform (SSP) and header bidding technology provider that helps publishers maximize programmatic advertising revenue through advanced yield optimization.

Epldt operates as a specialized sell-side platform (SSP) within the programmatic advertising ecosystem, providing advanced technology solutions that enable publishers and media owners to maximize the value of their digital advertising inventory. The platform facilitates automated, real-time bidding processes that connect publishers with diverse demand sources including ad exchanges, demand-side platforms (DSPs), and premium ad networks. Through sophisticated algorithmic optimization and machi...

AdPushup is a revenue optimization platform for publishers that uses machine learning to improve ad layouts, formats, and bidding strategies. The platform offers header bidding, ad layout optimization, and ad mediation to maximize publisher revenue.

Bidmatic is a header bidding and yield optimization platform for publishers that maximizes ad revenue through advanced programmatic monetization. The company provides managed header bidding solutions, ad quality controls, and revenue optimization services for digital publishers.

Colossus SSP is a supply-side platform focused on connecting diverse-owned media companies with premium programmatic demand. The platform specializes in providing monetization solutions for multicultural and minority-owned publishers, offering unique audience segments that are underrepresented in traditional programmatic ecosystems. It enables advertisers to reach diverse audiences at scale through a curated marketplace.

Direct Digital Holdings is a Houston-based ad-tech holding company (Nasdaq: DRCT, IPO Feb 2022). It operates Colossus SSP, its sell-side platform serving general-market and multicultural publishers, alongside the Orange142 buy-side arm.

Cross-platform ad-buying program that unifies Hulu + Disney digital video inventory (incl. ABC, ESPN streams) into single deals; guarantees target-audience reach + completed-view billing. Launched January 2020; integrates with InnovidXP for measurement.

IX's curated programmatic marketplaces product launched 2024.

Monumetric is an ad management platform that helps content creators and website publishers monetize their traffic through display advertising and programmatic solutions.

OpenX advanced supply-side targeting and curation platform for brands and agencies. Launched July 16 2025.

Outstream.video is a video advertising platform specializing in outstream video ad formats that play outside of traditional video content, enabling publishers to monetize without pre-existing video inventory.

Redstone is a digital advertising technology company specializing in programmatic advertising solutions and supply-side platform (SSP) technology for publishers.

Adtech company offering supply-side and identity solutions for publishers.

Amazon's supply-side platform (SSP) enabling publishers to manage and monetize programmatic ad inventory with full transparency into auction dynamics and buyer identity.