An inbox ad is a sponsored message that appears at the top of a user's email inbox, shaped like an ordinary email. Gmail promotions, GMX and Messenger inbox ads are examples.
How it's sold
You book it through the platform's self-serve ad tool, such as Google Ads or Meta Ads, or with a publisher like GMX through its sales team. Four publishers list it today.
What it costs
Most publishers quote this on request, and the usual basis is per click or per thousand impressions.
What you supply
You supply a subject line, a short preview text, an image and a landing page link.
Best for
It suits you if you want to reach people while they are checking email and drive clicks to an offer.
Before you buy
Check how the ad is labelled and which audiences you can target, since inbox placements often have strict rules.