ChatGPT ads are live in Europe: what advertisers in Estonia need to know.

Since 24 August 2026, ChatGPT has been showing ads to users in 31 European markets, and Estonia is one of them. A week later, on 31 August, OpenAI opened its self-serve Ads Manager to advertisers across Europe and announced that the ads business had reached a 1 billion US dollar annualised revenue run rate less than 200 days after launch. For the first time, a business in Tallinn can put an offer inside ChatGPT without going through a global agency holding company.

This is a news post, so it sticks to what OpenAI has confirmed or credible trade press has reported, and it says clearly where the evidence is thin. Everything below is current as of 19 September 2026. The platform is changing monthly, so check the dates before acting on any detail.

What happened, in order

OpenAI started testing ads in the United States in February 2026, shown only to users on the Free plan and the low-cost Go plan. Canada, Australia and New Zealand followed, the UK came in June, and in early June OpenAI began a beta of conversion-optimised campaigns for US advertisers.

On 21 August OpenAI announced the European expansion, and ads began serving on 24 August in all 27 EU member states plus Iceland, Liechtenstein, Norway and Switzerland. For the first week, buying ran only through large agency partners, with Publicis, Omnicom, WPP, Havas and Dentsu among those named by Digiday.

On 31 August, self-serve access to Ads Manager, still labelled beta, opened to eligible advertisers across Europe, India, the Middle East and North Africa. The original 50,000 US dollar minimum commitment from the US launch is gone. The same day OpenAI put the ads business at a 1 billion dollar annualised run rate. That figure is current monthly revenue multiplied by twelve, a snapshot of momentum rather than money booked over a full year.

On 16 September came the latest round: a US-only test of Sponsored Agents, where a user can click through from an ad into a separate, clearly labelled conversation with the advertiser's own AI agent; a HubSpot integration, the first CRM connected to ChatGPT Ads; a Shopify app, live in the US and rolling out to other ChatGPT Ads markets from 23 September; and AI tools inside Ads Manager that suggest copy and imagery from your landing page.

Where the ads appear and who sees them

An ad in ChatGPT is a sponsored card shown below the answer. OpenAI says ads are clearly labelled, separate from the answer and do not influence what ChatGPT says. In SE Ranking's analysis of more than 50,000 commercial prompts, every ad observed sat below the response and carried a single sponsored offer, with no second advertiser competing alongside it.

Only Free and Go users see ads. Plus, Pro, Business and Enterprise stay ad-free. That is worth thinking about before you plan anything: the heavy professional users you might picture when you think of ChatGPT at work are, by design, largely outside the audience you can buy. Conversations about sensitive subjects such as health and politics are also kept free of ads.

Scale is not the constraint. OpenAI's ads leadership has cited around 900 million weekly active users globally and said roughly 20 percent of queries carry direct commercial intent, as reported by Digiday. Those are OpenAI's own figures, and there is no public breakdown for Estonia.

The European rules are stricter than the American ones

This is the part most coverage skips, and it matters most for anyone buying from Europe. In the EU, OpenAI made consent the legal basis for personalised advertising. Users who do not opt in are targeted only on the live conversation and their approximate location. At launch, the European version does not use chat history or personal profiles for ad selection: the signals are the topic of the current conversation, approximate location, device, language and time of day.

In practice that makes ChatGPT ads in Europe a contextual channel, much closer to search than to Meta. Do not expect to build audiences, upload customer lists or retarget the way you would on Facebook and Instagram. The unit you are buying is a moment in a conversation where someone is actively working through a problem your product might solve.

Regulation is still moving around it. The EU AI Act bans manipulative techniques that exploit vulnerabilities, and the European Commission has said that designating ChatGPT's search function under the Digital Services Act is definitely possible, which would bring heavier obligations. Neither changes how you buy today, but both are reasons the European product may stay more conservative than the American one.

What it costs

Two buying models are available. A Reach objective buys impressions on a CPM basis, and a Clicks objective buys on a cost per click basis. According to OpenAI's guidance to advertisers, reported by MediaPost, the default maximum CPM bid is 60 US dollars and the recommended starting maximum for clicks is 3 to 5 dollars. Most spend so far has gone through cost per click. Conversion-optimised campaigns, billed either on clicks or on impressions, are in beta.

Independent numbers are still scarce. The most useful so far come from SE Ranking, which ran its own campaigns for two weeks: more than 97,000 impressions and 1,263 clicks, a click-through rate of roughly 1.3 percent, with cost per click landing between 1.50 and 4 dollars. The same study found ads on 25.94 percent of commercial prompts, 1,159 distinct advertisers, and a relevance problem: about 14 percent of ads were semantically unrelated to the prompt they appeared next to.

Treat those as one study from the first weeks of a new platform, not as benchmarks. There is no published Estonian data yet, and as we argued about Meta costs in the Baltics, the only benchmark worth trusting is the one you build from your own account.

How measurement works

Conversions are tracked with OpenAI's Measurement Pixel in the browser and a Conversions API on the server, the same two-layer pattern as Meta. The pixel is a script in the page head, initialised with a Pixel ID from Ads Manager.

The detail that catches people: installing the pixel does not record a single conversion. According to OpenAI's developer documentation, you also have to call a measure command at the moment the conversion happens, with a standard event such as lead_created or order_created, or a custom event of your own. A pixel that only initialises will load, send diagnostics and look healthy in the browser, while Ads Manager reports no conversions at all.

Attribution uses the configured click window plus a fixed one-day view-through window after an eligible impression, and when both apply the click wins. The pixel also has automatic advanced matching: it detects customer information on your site, such as email addresses in forms, and hashes it in the browser with SHA-256 before sending. For European sites, the pixel has a consent command that holds tracking until the visitor agrees, and it is worth wiring into your cookie banner the same way you already handle the Meta Pixel.

Reporting is basic for now: impressions, clicks, spend, CTR, average CPC and CPM, and conversions. Advertisers note there is no equivalent of a search terms report showing which prompts triggered an ad. Early advertisers have also reported clicks that their analytics cannot find, one practitioner describing 57 clicks in Ads Manager against fewer than 20 recorded visits. Reconcile against your own database from the first day, the same discipline we describe for Conversions API deduplication.

Is it worth testing from Estonia?

Our honest read: worth a small, deliberate test for the right businesses, and not yet worth moving budget away from Meta.

It suits businesses whose customers already ask ChatGPT the question the business answers: comparing software, choosing a service provider, planning a trip, working out which product fits a specific need. If your sale starts with someone researching, you want to be in that moment. If your sale starts with someone discovering a product they did not know they wanted, that is still Meta's job, and a strong creative testing process will do more for you than a new channel.

Language is the open question for a small market. OpenAI's new opt-in setting adapts ad headlines to the conversation and translates them into the user's language, which could matter a great deal in Estonian, where most global platforms serve English by default. It is new and untested, so check the translated output before you trust it with your brand.

If you test, keep it tight. Cap the budget. Wire one clear conversion event through the measure command and confirm it arrives. Gate the pixel on consent. Run long enough to get past the first days of unstable delivery, and judge the result against your own conversion data, not the dashboard alone.

The takeaway

ChatGPT ads went from a US experiment to a self-serve product available in Estonia in about seven months, and the revenue curve says advertisers are buying. In Europe it is a contextual, consent-first channel with premium-priced inventory, beta measurement and very little independent data. That makes it an interesting test and a poor place to bet the budget, for now. If you want to test it properly, our ChatGPT ads pilot runs the whole thing in four weeks. For a second opinion first, book a 30-minute call.