Onetag

Onetag is the supply platform built for buy-side performance, delivering unique demand and higher yield for publishers through AI-driven inventory decisioning. By removing low-quality open auction impressions at source and requiring 50% fewer bids per impression than the industry average, Onetag ensures unique incremental demand reaches high-quality publisher inventory. This translates into tangible revenue uplift: publishers working with Onetag see a 30% CPM increase via Onetag Deals, a 40% total bid density increase from Onetag demand, and in 31% of winning bids, Onetag was the only exchange bidding, representing demand publishers would otherwise miss. Onetag now adds business conversion optimisation via the Dynamo algorithm and high-impact immersive creative formats via Aryel; this ensures advertisers pay more for better-performing inventory, with optimisation shown to enhance publisher CPMs whilst reducing advertiser CPAs.

Integration with Onetag is the easiest in market. A single direct line of ads.txt is all that is required, with no manual placement mapping, no configuration needed, and automatic onboarding that gets publishers live in minutes. Onetag supports all major header bidding wrappers including Prebid client and server-side, Google OB, Amazon TAM, and oRTB 2.5 endpoints. Publishers benefit from automated payments with no invoice required, real-time reporting by site and placement, and a dedicated Customer Success team providing QBRs and performance insights. With direct connections to 2,000+ premium publishers and 5,000+ advertisers including major global brands, alongside full Universal ID support and industry alignment across IAB Tech Lab frameworks, Onetag gives publishers the demand quality, creative innovation and operational simplicity they need to maximise the value of every impression.