ChatGPT Ads vs. advertising within Perplexity and Gemini: what works in 2026?

ChatGPT Ads, advertising within Perplexity and Gemini ads are three distinct routes to the same goal in 2026: being visible when a potential customer consults an AI assistant. The platforms look similar on the surface, but they differ considerably in advertising capabilities, reach and the type of user you can engage.

Key takeaways

• ChatGPT has the largest reach at approximately 400 million monthly active users worldwide (Statista, 2026), but advertising options are still limited and partly in testing.
• Perplexity was the first AI search engine to introduce a structured advertising model, focused on sponsored answers with direct purchase intent.
• Gemini is accessible via Google Ads: ads can appear within Gemini-generated answers as part of existing Google campaigns.
• For e-commerce businesses like ToetsJeKennis.nl and lead gen businesses like Clima-Active.nl, the platforms are complementary rather than interchangeable.
• AdBrains actively monitors all three platforms and automatically adjusts campaign structure and bidding strategy based on performance data.

What exactly are ChatGPT Ads?

ChatGPT Ads are advertisements displayed within the ChatGPT interface, OpenAI's conversational AI platform. In 2026, OpenAI is gradually rolling out an advertising model where sponsored mentions or product recommendations appear as part of or adjacent to AI-generated responses. ChatGPT Ads are not classic search ads: they do not appear alongside a traditional search query but during a conversation where the user is asking a question or solving a problem. When comparing ChatGPT Ads vs Google Ads, the key distinction lies in intent capture: Google Ads responds to an explicit search query, while ChatGPT Ads surface organically within a multi-turn conversation.

What makes ChatGPT unique as an advertising channel is context. Users ask nuanced questions, compare options or seek advice. These are high-intent moments, comparable to a branded search in Google Ads, but in conversational form. For a webshop like E-4motion.com, which sells new electric folding bikes, a user asking ChatGPT "which electric folding bike is best for commuting?" is a highly valuable audience to reach.

OpenAI has communicated that advertisers will be able to set up campaigns via a dedicated advertising platform, but the exact targeting options, bidding models and reporting structures have not been fully documented for the broader market as of 2026. Advertisers who enter early benefit from low competition and can build brand awareness before the space becomes crowded. Advertisers wondering how to set up ChatGPT Ads should expect a process similar to onboarding on a new ad network: creating an account, defining a budget and submitting creative for review, though the finer details will likely evolve as OpenAI refines the platform.

How does advertising within Perplexity work?

Monthly active users AI platforms (2026)

Source: Statista, 2026, worldwide, rounded to millions

ChatGPT

400M users

Gemini

350M users

Perplexity

100M users

Perplexity positions itself as the AI search engine: users ask a question and receive a direct, source-cited answer. In 2026, the platform introduced an advertising model where brands can sponsor "Related Questions" or appear as sponsored source citations at the top of the answer panel. Perplexity calls this model "sponsored answers" and it stands out because the ad content connects directly to the user's question.

Perplexity reaches approximately 100 million monthly active users worldwide (Statista, 2026). That is smaller than ChatGPT or Gemini, but the user base is notably homogeneous: tech-savvy consumers and business users who have actively chosen an AI search engine over a traditional one. This makes the audience exceptionally valuable for certain niches.

For Clima-Active.nl, which offers air conditioning and heat pump installation with quote requests as its conversion goal, Perplexity is attractive because someone asking "how much does it cost to have a heat pump installed?" has clear purchase intent. Perplexity's advertising model meets users at that moment, similar to an exact match search in Google Ads but in conversational form.

Gemini and advertising through Google

Gemini is Google's own AI assistant and is deeply integrated into the Google ecosystem. Advertising within Gemini in 2026 runs through existing Google Ads campaigns: ads running on the Google Search Network and Display Network can also appear in Gemini-generated answers when Google considers them relevant based on the user's query or conversation.

This is a fundamental difference from ChatGPT Ads and Perplexity: you do not need a separate platform. If you are already active on Google Ads with a well-structured Search campaign or Performance Max, there is a real chance your ad is already appearing in Gemini responses. Google communicates via Google Ads Help (2026) that ads are selected for integration into AI-driven answers based on relevance and Ad Strength.

That makes Gemini the most accessible channel for most advertisers. You manage campaigns in one environment, reporting is familiar and you can build on existing conversion tracking. The downside is having less control over when and how your ad appears within a Gemini answer compared to a traditional search ad.

Comparison: ChatGPT Ads, Perplexity and Gemini

The table makes clear that Gemini via Google Ads is the most mature and immediately deployable channel for most advertisers. ChatGPT Ads and Perplexity are valuable additions, particularly for brands that want to establish a presence on emerging platforms early.

What this means for e-commerce and lead generation

Conversion funnel: AI platform ad to lead

Calculation example: 10,000 impressions on an AI advertising platform

Impressions

Ad shown within AI answer

Clicks

Higher intent than typical display

Landing page visited

After click-through to website

Conversion (lead or purchase)

Calculation example target conversion

3% end-goal conversion in calculation example

E-commerce and lead generation businesses don't want the same things from AI advertising platforms. For a webshop like ToetsJeKennis.nl, which sells online exams and courses at an average order value of €50, the ability to track conversions directly is non-negotiable. Gemini via Google Ads delivers exactly that: Enhanced Conversions, server-side tracking and tROAS targets are all available through the Google Ads interface most advertisers already know.

ChatGPT Ads are a different story for ToetsJeKennis.nl. Think of it more as a branding and demand generation channel. When someone asks ChatGPT "how do I prepare for my theory exam?" or "which exam preparation app is the best?", they're a potential buyer. Showing up in that moment builds brand awareness and can drive conversions down the line, even if the click-through isn't directly measurable.

For lead generation businesses like Clima-Active.nl, where the goal is quote requests, Perplexity is worth a close look. The questions users ask there tend to be very specific. "Which heat pump brand is best for a semi-detached house?" is the kind of query that comes from someone who is already well into the buying process. A sponsored answer in that context carries more weight than a generic display ad. That said, Perplexity offers the most limited reporting options of the three platforms in 2026, which makes it harder to justify the spend.

How AdBrains manages and optimises AI platforms

Manual management vs. AI-driven approach

Advertising on AI platforms: without and with AdBrains AI

Manual management

• Managing one platform at a time
• No cross-platform signal enrichment
• Ad copy updated manually
• Slow response to platform changes
• Conversion data fragmented per platform

AdBrains AIAI approach

• Multi-platform monitoring from one system
• Automated signal enrichment via sGTM
• RSA and ad copy optimisation daily
• Automatic strategy switch on performance dip
• Centralised conversion data across all channels

AdBrains has built its AI infrastructure so that new advertising channels, including ChatGPT Ads and Perplexity, are treated as extensions of the existing campaign ecosystem rather than standalone experiments. That makes a real difference to the quality of campaign management.

In practice, this works as follows. Our multi-agent verification system checks every optimisation decision through four independent AI agents before it is executed. That includes budget allocation across multiple platforms simultaneously. If a campaign on Perplexity underperforms while a comparable Google Ads Search campaign delivers strong results, the system detects that difference and automatically adjusts the distribution, without manual intervention but with human verification afterwards via the dashboard.

For conversion data, AdBrains uses server-side signal enrichment through its own sGTM infrastructure. This is especially relevant for AI platforms: when ChatGPT Ads or Perplexity offer limited native conversion tracking, our server-side setup enriches the data by merging first-party signals and passing them back to Google Ads. That way, Smart Bidding benefits from better signals even when part of the customer journey runs through an AI platform.

Our RSA improvement system analyses the Ad Strength of all active ad copy daily. Ads that qualify for Gemini integration have a higher chance of being shown when Ad Strength is rated "Excellent". The system automatically detects ads with "Poor" or "Average" status and rewrites them based on landing page relevance and search behaviour. This improves not only the classic Quality Score but also increases the likelihood that Google selects the ad for display within a Gemini response.

The Keyword Incubator that AdBrains runs for clients like E-4motion.com captures search behaviour that is shifting from traditional Google Search to AI interfaces. New query patterns are tested in an isolated incubator campaign before being scaled up, ensuring that budgets are only committed once there is sufficient data to support reliable Smart Bidding decisions. The strategy-switch system monitors campaigns that generate too little conversion volume on new platforms like ChatGPT Ads, automatically pausing them when they fall below a preset threshold and reactivating them once enough data is available for accurate targeting.

When to choose which platform

The choice between ChatGPT Ads, Perplexity and Gemini depends on three factors: your conversion type, your willingness to experiment and your measurement requirements. Gemini via Google Ads is the starting point for most advertisers because it connects to existing campaigns and conversion tracking. ChatGPT Ads and Perplexity are additions for businesses that want to experiment early on growing platforms.

A practical guide by situation:

• You need directly measurable conversions: start with Gemini via Google Ads (Search or Performance Max).
• You are in a niche with high purchase intent and want an early presence: test Perplexity sponsored answers.
• You want to build brand awareness with a broad, tech-literate audience: explore ChatGPT Ads once the platform becomes more widely available.
• You have budget for multiple channels: combine all three, but ensure centralised conversion tracking.
• Your conversion path is long (such as heat pumps via Clima-Active.nl): use AI platforms for the orientation phase and Google Ads for the decision phase.

FAQ: ChatGPT Ads, Perplexity and Gemini

Are ChatGPT Ads already available to advertisers?

Not fully. OpenAI is rolling out its advertising model in phases in 2026, with larger markets and specific sectors getting priority. Advertisers can register interest via OpenAI's business channels, but availability and the exact advertising options remain limited and are being expanded step by step. The ChatGPT advertising platform itself is still evolving, so early access often comes with fewer targeting controls than advertisers are used to from mature channels. It makes sense to prepare campaign structures and brand messaging now so you can enter immediately once the platform becomes more widely available.

Can I use my existing Google Ads campaigns to advertise in Gemini?

Yes, partly. Google automatically integrates existing Search and Performance Max campaigns into Gemini responses when the algorithm considers the ad relevant. You do not need to create a separate campaign. What you do need is high Ad Strength and relevant ad copy, because Google selects ads based on quality for display in Gemini. There is no guarantee your ad will appear, but a strong campaign structure significantly increases the likelihood.

How do I measure conversions from ChatGPT Ads and Perplexity?

This is the biggest challenge for both platforms in 2026. Native conversion measurement is limited or unavailable. The practical solution is server-side tracking via a dedicated Google Tag Manager server container (sGTM), combined with UTM parameters in ad URLs. This lets you isolate clicks and sessions from AI platforms in Google Analytics and optionally pass them through to Google Ads via Enhanced Conversions. AdBrains has this infrastructure in place as standard for clients, connecting data from all channels into a single reporting model.

Is advertising on Perplexity expensive compared to Google Ads?

Perplexity uses a CPM-based model for sponsored answers. A direct cost comparison with Google Ads is difficult because targeting depth and conversion volume differ considerably. What we see in practice is that Perplexity user intent is high, which can keep the effective cost per valuable click low. For sectors with a high CPC in Google Ads, such as air conditioning installation or financial services, Perplexity can be an interesting alternative or supplement, but this requires careful testing and tracking.