ChatGPT Ads adds incrementality measurement partners

OpenAI told ChatGPT Ads advertisers on Friday that it has expanded its measurement ecosystem with Northbeam, DV Rockerbox and INCRMNTAL, plus mobile measurement partners Kochava, Tenjin and Airbridge. The significance, as Tipsheet reads it, is that Northbeam and INCRMNTAL are incrementality specialists, the discipline that measures how much additional business advertising generates beyond what would have happened anyway. INCRMNTAL, now owned by Smartly, specialises in causal incrementality. Tipsheet's thesis is direct: OpenAI needs to prove that ChatGPT advertising generates incremental business rather than harvesting credit for conversions that would have happened regardless, and the addition of incrementality partners speaks straight to that challenge.

The crux

ChatGPT Ads is moving past the "does it work at all" phase into the "can it prove incrementality" phase, which is the measurement bar every serious ad platform has to clear before budgets scale.

Sell-side read

ChatGPT inventory is becoming a measurable channel, which means it competes for the same incrementality-tested budget as premium publisher supply, so publishers selling context and attention need to lead with their own measurement story rather than cede the proof to walled gardens.

Watch

OpenAI's ad revenue trajectory through the fourth quarter, since The Information reports it may pass $1 billion this year against loftier internal goals.