The short answer.
Keep Google Ads as the channel that carries your pipeline, and treat ChatGPT ads as an experiment with a fixed budget and an end date. One is a 26-year-old advertising programme built around typed searches; the other began testing on 9 February 2026.
OpenAI says more than 1.2 billion people use ChatGPT each week, that over 100,000 advertisers have run campaigns, and that ads are available in 89 countries (announcement of 21 October 2026). Our guide to advertising on ChatGPT covers who can buy and how the platform works.
The question for a B2B budget holder is narrower: can it reach your buyers, and can you tell whether the leads were any good? Today the documented answers are “some of them” and “only up to the form fill”. Google Ads can still be tuned to qualified opportunities, which is the heart of Google Ads management for qualified leads.
- ✓Choose Google Ads first if buyers search for your category by name and you are not yet capturing that demand profitably.
- ✓Add a ChatGPT ads test if Google is already working, your category is allowed, and your buyers plausibly use ChatGPT’s free tiers.
- ✓Choose neither yet if you cannot trace a lead from click to qualified opportunity. Fix that first.
The comparison at a glance.
The table sets the two platforms side by side on the points that decide a B2B test. Every row comes from OpenAI’s or Google’s own pages, read on 12 November 2026.
| Point | ChatGPT ads | Google Ads (Search) |
|---|---|---|
| Started | Testing began in the US on 9 February 2026 | Launched as AdWords on 23 October 2000 |
| What triggers an ad | “The context and intent of your current conversation”, the ad’s landing page, title and copy, and advertiser hints | Keywords: “words or phrases that are used to match ads with the terms people are searching for” |
| Where the ad shows | One ad unit below a ChatGPT response | Search results; also within or beside AI Overviews and AI Mode in the US and select English-speaking markets |
| Who can see it | Free and Go plans only. Plus, Pro, Business, Enterprise and Edu accounts have no ads | Anyone searching on Google, subject to your own targeting |
| Targeting controls | Country and location, platform, custom audience lists, context hints. Hints “are not exact-match keywords” | Broad, phrase and exact match keywords, plus location, audience and device settings |
| Your own lists | Inclusion needs at least 25,000 matched users; smaller lists work only as exclusions | Remarketing list membership is one of the signals Smart Bidding uses |
| Lead measurement | Pixel and Conversions API; standard events such as lead_created; custom events cannot steer delivery | Offline conversion imports and enhanced conversions for leads tie closed deals back to the click |
| B2B category limits | Early focus on consumer categories; financial, health and legal ads restricted, mostly to approved US advertisers | Policies apply by category, but B2B services and software are long established |
Prices are left out on purpose: neither platform has a list price, because both run auctions.
Intent: a search versus a conversation.
Google Ads responds to a single typed search; ChatGPT ads respond to the meaning of a conversation that may run over several turns.
OpenAI’s engineers described the contrast on 21 October 2026. A conventional system starts with “a well-defined event”, such as a search query. In ChatGPT, “people arrive with goals rather than a one-answer search query”.
You cannot buy a phrase. On Google you choose which searches are worth a bid. In ChatGPT the system decides whether your ad fits the conversation.
No ad is a normal result. OpenAI’s engineers wrote that “returning no ad is an ordinary, successful outcome.” A narrow B2B offer may find few conversations where it is shown, and low delivery in a test is a finding in itself.
The ad sits under an answer you do not control. OpenAI states that “ads do not influence ChatGPT’s answers”. The answer above your ad may recommend competitors, or you, on its own evidence. See how ChatGPT picks companies to recommend for that unpaid side.
On Google, a buyer types: “payroll software for UK construction firms”. An advertiser bidding on that phrase can appear, and can see the search term in a report afterwards.
In ChatGPT, the same buyer writes: “We are a 60-person groundworks contractor. Half the team are subcontractors. Our accountant wants us off spreadsheets by April. What should we look for in payroll software?”
What differs: the conversation carries far more context, but the advertiser does not choose the trigger and never sees it. OpenAI says advertisers “only receive aggregated, non-identifying information about how their ads perform”.
Invented searches, written to show the pattern. They are not real queries or ads.
Google is no longer only a list of links
Google’s help pages say existing Search, Shopping and Performance Max campaigns are “automatically eligible to serve ads within AI Overviews and AI Mode”, in English in the United States and select English-speaking markets. Results from those placements are folded into your normal reports, not shown separately. Our guide to Google AI Mode for B2B sites covers what that surface is.
So “conversational ads” is not one product: both companies are heading there from different starting points.
Reach: who can see each ad.
Google Ads can reach anyone who searches. ChatGPT ads reach only people on its Free and Go plans, in countries where ads serve. For B2B, the plan limit matters most.
OpenAI’s help centre is specific: “Plus, Pro, Business, Enterprise, and Edu accounts will not have ads.”
An employee using a company-paid ChatGPT Business or Enterprise seat to research suppliers will not see your ad. An owner-manager or a small team on the free plan may. OpenAI has not published how business researchers split across plans, so your reachable share is not confirmed.
Countries
OpenAI’s announcements put availability at over 40 countries on 31 August 2026, more than 60 on 23 September and 89 on 21 October.
The United States and the United Kingdom are both on OpenAI’s self-service list. The legal entity that is billed must be based in a listed country.
One European limit: OpenAI says personalised ads “are not initially available in the European Economic Area (EEA) or Switzerland”, and advises against custom audiences in campaigns aimed there.
Categories
Not every B2B firm is eligible. OpenAI’s ad policies (updated 10 September 2026) say the early phase is “focused on a limited set of consumer categories”, with more to follow. Three groups that matter to professional services are restricted:
- Financial services: approved US advertisers case by case; “ads for financial services outside the US are generally prohibited”.
- Legal services: permitted in the US for licensed advertisers; “currently prohibited” outside the US.
- Health services: approved US advertisers case by case; generally prohibited elsewhere.
A UK accountancy, wealth manager or law firm should read that page first. Where any B2B service sits among the allowed categories is decided in OpenAI’s review, so confirm eligibility before you build creative.
Targeting: keywords versus hints and lists.
Google gives you keywords and match types. ChatGPT gives you geography, platform, your own customer lists and “context hints”, and OpenAI is explicit that hints are not keywords.
Google’s match types give a spectrum of control. With exact match, in Google’s words, “ads may show on searches that have the same meaning or same intent as the keyword”; broad match reaches searches merely “related to your keyword”.
OpenAI’s developer documentation lists four campaign controls:
- Geography: countries or supported locations, included or excluded.
- Platform: the iOS app, the Android app, or web. Ads Manager splits web into desktop, iOS and Android web.
- Custom audiences: your lists of customer or prospect identifiers, matched to users.
- Context hints: extra information about the ads in an ad group, up to 2,000 per ad group. “Hints are not exact-match keywords,” the page says, and “do not replace explicit geographic, platform, or audience targeting.”
The 25,000 threshold
Custom audiences sound ideal for account-based marketing, but there is a size rule. OpenAI’s help centre says “inclusion audiences and audience bid adjustments require at least 25,000 matched users”. Smaller audiences “can be used for exclusions”.
A B2B firm with 3,000 contacts in its CRM can therefore use the list to stop existing customers seeing an ad, but not to aim at prospects. If reaching named job roles at named companies is the requirement, compare Google with LinkedIn instead; our guide to Google Ads against LinkedIn Ads for B2B does that.
What replaces the keyword in ChatGPT is the clarity of the ad and the page behind it. OpenAI’s guidance asks for “clear, specific, and benefit-focused copy”, and says landing pages “must not block OpenAI user agents (OAI-AdsBot and OAI-SearchBot)”.
Measurement: what each reports back.
Both platforms can count a form submission. Only Google has a documented route for telling the bidding system which of those leads became a qualified opportunity or a sale. For B2B, that difference should weigh most.
On Google, the mechanism is offline conversion imports. Google’s help page says they let you “measure what happens in the offline world after your ad results in a click or call to your business”, such as a customer signing a contract. It recommends enhanced conversions for leads, “an upgraded version of offline conversion import”. Conversion windows run from 1 to 90 days depending on the source, with 30 days the default.
ChatGPT ads have moved quickly. OpenAI’s announcement of 5 May 2026 said it had “recently launched” Conversions API and pixel measurement. On 5 October it added attribution partners and said it was exploring geo-based experiments with measurement partners. Its documentation lists standard events including lead_created (“a user submits a lead form or requests contact”) and appointment_scheduled.
The limits, as documented on 12 November 2026:
- A conversion campaign steers towards one standard event, and it cannot be changed after creation.
- “Custom events cannot be used for conversion optimization,” OpenAI’s conversion-tracking page says. Your own “qualified lead” event can be recorded, but cannot guide delivery.
- We found no CRM-stage event among the standard event names. Whether one is planned is not confirmed.
- The consumer help page still says that advertisers “receive aggregated reporting such as views and clicks”. You do not see the conversations your ad appeared under.
The practical result: a ChatGPT ads test reports cost per click and per form fill. Lead quality you must work out yourself. OpenAI allows UTM tags on each ad’s destination URL, so tag every ad, capture the tags with the form, and follow the leads through your CRM. Our guides to website lead tracking by page and source and to sending CRM stages back to Google Ads explain the plumbing on both sides.
Then judge both channels on the same measure. Our piece on cost per lead against cost per qualified opportunity shows why the ranking of channels often flips once quality is counted.
One caution on published results: the partner findings quoted in OpenAI’s announcements are from consumer and ecommerce brands. We found no B2B lead-generation result there, so there is no published benchmark to plan a B2B test against.
Bidding and how you pay.
Both platforms run auctions and both now offer automated bidding towards a target cost. The difference is which conversion the automation learns from.
ChatGPT ads began on a cost-per-thousand-impressions basis; cost-per-click bidding followed on 5 May 2026. OpenAI’s bidding help page now describes three strategies: Intelligent bidding (formerly Maximize Results), Target CPA for conversion campaigns and Target CPC for click campaigns. The last two became available for new campaigns on Monday 9 November 2026, and the older Max Bid and Max CPC controls “will retire on January 1, 2027 for existing campaigns”.
A target, the page says, is “an average-cost goal”, “not a fixed price per conversion or click”.
Google’s equivalent is Smart Bidding, which Google defines as “bidding strategies that use Google AI to optimize for conversions or conversion value”: Target CPA, Target ROAS, Maximize conversions and Maximize conversion value. The contrast that matters for B2B: a Google target can be pointed at an imported, qualified conversion, while a ChatGPT target points at a standard event such as a lead form.
We give no price comparison. OpenAI publishes no benchmarks, and its pages differ: the conversion-campaign page says “there is no recommended bid amount at this time”, while an older introductory page, read on 12 November 2026, still suggests starting click campaigns at a maximum bid of $3–$5 USD, on a control that is being retired. For the Google side, with sourced benchmarks, see our analysis of why B2B cost per click keeps rising.
Maturity and pace of change.
Google Ads is a mature system whose rules change slowly at the core. ChatGPT ads are nine months old and still changing monthly. Assume the platform will be different by the time a test ends.
Google announced its self-service programme, AdWords, on 23 October 2000. In the third quarter of 2026 alone, Alphabet reported 63.35 billion dollars of “Google Search & other” revenue, up 12% on a year earlier. OpenAI said on 31 August 2026 that ChatGPT ads had reached a one-billion-dollar annualised revenue run rate in under 200 days. The figures are not like for like (one quarter’s revenue against an annualised rate), but the gap in scale is plain.
Fast change cuts both ways: a test set up in October on Max Bid is already on a retiring control. We keep a dated change log on our ChatGPT ads desk for B2B for that reason.
Where each channel is stronger.
Google Ads is stronger wherever a buyer already knows what to search for and you need proof of lead quality. ChatGPT ads may add something where buyers are still working out what they need, and where a form fill is a fair measure of success.
| Your situation | Better starting point | Why |
|---|---|---|
| Buyers search for your category by name | Google Ads | Keywords capture that demand directly, and search terms are reported |
| Long sales cycle, few deals, high value | Google Ads | Offline imports let bidding learn from qualified stages, not form fills |
| You need named roles at named companies | Neither; compare LinkedIn | ChatGPT list targeting needs 25,000 matched users |
| Buyers describe a problem, not a product | ChatGPT ads test | Conversations carry the context a short search lacks |
| Google Ads leads are poor today | Fix Google first | The same landing page and follow-up will waste a new channel too |
The last row matters most. A new ad surface inherits every fault in the landing page, the form and the reply. Work through our recovery playbook for Google Ads leads that do not convert before moving budget.
Paid and unpaid visibility in ChatGPT are separate
An ad does not change what ChatGPT says about you, and our OpenAI ads service plans tests on that basis. It is worth knowing where you stand in the answers before paying for the space beneath them. Our free AI visibility report runs a sample of your buyers’ questions and shows who is named.
A decision flow for the test budget.
Work down five questions in order. The first “no” tells you where the test budget belongs.
- 01 · MEASUREMENTCan you trace a paid lead to a qualified opportunity? If no: spend on tracking first.
- 02 · GOOGLEAre core Google Search campaigns meeting their target cost per qualified opportunity? If no: fix or fund Google.
- 03 · ELIGIBILITYIs your category allowed, and is your billing entity in a listed country? If no: stop here.
- 04 · AUDIENCEDo your buyers plausibly research on ChatGPT’s Free or Go plans? If no: test LinkedIn or more Google instead.
- 05 · TESTAll yes: ring-fence a capped ChatGPT ads test, with UTM tags and an end date.
Fund it from new money or from waste, not from what works. Cutting a Google campaign that is meeting its target trades a known return for an unknown one.
Decide the measure before launch. Use cost per qualified opportunity, counted in your CRM, with the definition of “qualified” you apply to Google.
What to have in place before launch is covered step by step in our OpenAI ads readiness checklist. If you would like help planning the test, that is what our ChatGPT ads readiness and strategy work covers. If the Google side needs attention first, that is the job of our managed Google Ads campaigns.
The budget self-check.
Tick each statement that is true today. The first five test your foundations for any new paid channel; the second five test the fit with ChatGPT ads. Nothing you tick is sent anywhere.
Foundations 0 / 5 · ChatGPT ads fit 0 / 5
Tick what is true today. If you are not sure, leave it unticked.
Five ticks in the second group cannot make up for two in the first: a test you cannot measure teaches you nothing.
Questions budget holders ask.
Are ChatGPT ads better than Google Ads for B2B?
Not as a replacement. Google Ads can be steered by qualified leads through offline conversion imports; ChatGPT ads optimise towards standard events such as a lead form.
Should I advertise on ChatGPT or Google first?
Google first, in most B2B cases. It captures buyers who already search for what you sell. If your Google campaigns are not yet meeting their targets, fixing them is a better use of the next pound or dollar than a new channel.
Can I target keywords in ChatGPT ads?
No. OpenAI’s documentation offers context hints, which it says “are not exact-match keywords”, alongside geography, platform and custom audiences.
Can ChatGPT ads optimise for qualified leads instead of form fills?
Not in the documentation we read. Conversion campaigns use one standard event, and OpenAI says custom events cannot be used for conversion optimisation.
Will my employees’ or buyers’ company ChatGPT accounts show ads?
No. OpenAI says Plus, Pro, Business, Enterprise and Edu accounts will not have ads.
Does buying ChatGPT ads change what ChatGPT says about my company?
No, according to OpenAI: ads “do not influence ChatGPT’s answers”.
Sources. OpenAI help centre, developer docs, policies and announcements: Ads in ChatGPT; availability; custom audiences; bidding; conversion campaigns; creating ads; creating campaigns; the basics; targeting; events; conversion tracking; ad policies; 5 May 2026; 31 Aug 2026; 23 Sep 2026; 5 Oct 2026; 21 Oct 2026; ad stack. Google and Alphabet: keyword matching; ads in AI Overviews; offline imports; conversion windows; Smart Bidding; 2000 press release; Alphabet Q3 2026. All accessed 12 November 2026.