Attention measurement firm Adelaide has launched the AU Ecosystem, a program that lets publishers contractually guarantee a minimum level of media quality to advertisers rather than simply report it after the fact, built around Adelaide’s AU metric, which blends placement signals, eye-tracking data and full-funnel outcome measures into a single omnichannel score. Duolingo is the first major partner to launch AU guarantees through the program. A March 2026 audit found Duolingo’s mobile in-app video inventory scored 34% above Adelaide’s benchmark, with longer-form ad formats showing the strongest attention results, and the company is now structuring ad packages around its highest-attention placements and folding AU reporting directly into campaign delivery.
Why it matters: media quality metrics have mostly functioned as a scorecard advertisers check after a campaign runs, with little recourse if the number disappoints. A guarantee changes the commercial relationship, because a publisher that promises a minimum AU score is accepting risk that used to sit entirely with the buyer. “Guarantees are the clearest signal a publisher can send about inventory quality,” said Marc Guldimann, Adelaide’s co-founder and CEO. Duolingo’s Head of Sales, Andrew Guendjoian, framed the underlying logic: “People come to Duolingo to learn, which means they are actively listening, thinking, and responding, not passively scrolling.”
The original insight is the direction of travel: attention measurement is moving from an analytics layer into a contract term. Once one major publisher guarantees a quality floor, buyers gain a reference point to demand the same from everyone else, which is exactly how measurement standards have spread in this industry before. Brand lift measurement has already been moving away from post-campaign surveys, and attention and visibility metrics are converging into the same discipline; a publisher willing to put its quality score in a contract, rather than a deck, is the clearest evidence yet that the metric is maturing into something advertisers can actually price against.
Source: ExchangeWire
