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.
Was the largest independent programmatic ad tech platform globally prior to acquisition, serving as a neutral open alternative to Google's DoubleClick and other walled garden platforms.
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. In June 2018, AT&T acquired AppNexus and placed it under its Xandr division, with the deal reportedly valued at $1.6 billion. Microsoft subsequently acquired Xandr in 2022 and folded it into its advertising business, productizing it as Microsoft Monetize on the sell side and Microsoft Invest on the buy side.Source 1: wikipedia.org — AppNexusSource 2: apis.io — AppNexus — API Provider, Schemas
Business model
Marketplace
Target market
Enterprise
What they offer
AppNexus Marketplace
A real-time bidding exchange connecting buyers and sellers of digital advertising inventory at global scale.
Invest DSP
Demand-side platform enabling advertisers and agencies to plan, buy, and optimize programmatic media across channels.
Monetize SSP
Supply-side platform allowing publishers to manage, optimize, and monetize their digital ad inventory programmatically.
Programmable Bidder
A customizable bidding engine allowing sophisticated buyers to implement proprietary bidding logic and algorithms.
Console
Unified campaign management and reporting interface for managing programmatic advertising operations across the platform.
Data Management Platform (DMP)
Audience data management and segmentation tools enabling targeting and data monetization for buyers and sellers.
Publisher Ad Server
Ad serving technology for publishers to manage direct-sold and programmatic inventory holistically.
Key features
Real-time bidding (RTB) infrastructure processing billions of impressions dailyFull-stack programmatic platform covering DSP, SSP, ad exchange, and ad serverOpen and customizable bidding logic via Programmable BidderCross-channel inventory access including display, video, mobile, and nativeAdvanced audience targeting and data management capabilitiesTransparent, neutral marketplace positioning without media ownership conflictsRobust APIs enabling white-label and custom platform buildsGlobal reach with data centers across multiple continents
Use cases
Programmatic display and video advertising buying for agencies and brandsPublisher monetization of digital ad inventory via open auction and private marketplace dealsBuilding white-label DSP or SSP products on top of AppNexus infrastructureAudience data activation and targeting for performance and brand campaignsReal-time bidding and algorithmic media trading for independent trading desksCross-channel programmatic campaign management and optimization
Customer segments
Agency holding groups and independent trading desksPremium digital publishersAd networks and resellersDirect advertisers and brandsTechnology companies building white-label ad platformsData providers and audience segment vendors
Tech & specs
Technology stack
Real-time bidding (RTB) protocolC++ and Java for high-performance auction infrastructureHadoop and distributed data processing for analyticsRESTful APIs for platform integrationCustom in-house ad serving and decisioning enginesGlobal CDN and data center infrastructure
Security & compliance
GDPRCCPAIAB TCF (Transparency and Consent Framework)ads.txt / sellers.json complianceSOC 2