ChatGPT vs Perplexity vs Google AI: Which Recommends Parisian Businesses Best?

When a Parisian resident or tourist asks an AI for a local recommendation, the result depends as much on the platform used as on the business being searched. ChatGPT, Perplexity, and Google AI Overview do not work the same way, do not consult the same sources, and do not recommend the same businesses.

This article compares the three platforms on what matters for a local Parisian business: how each selects its recommendations, which sources it favors, how reliable it is, and above all — how to optimize your presence for each one.

ChatGPT: The Most Influential, the Most Unpredictable

ChatGPT dominates the AI search market with roughly 80% market share among chatbots. It processes 2.5 billion queries per day and has over 800 million weekly active users. It is the most important platform to appear on — and the hardest to master.

How ChatGPT Selects Its Recommendations

ChatGPT operates in two stages. First, it generates intermediate search queries (called “fan-out queries”) that it sends to search engines to retrieve real-time sources. Then, it synthesizes these sources to formulate a conversational response.

A study presented at SMX Paris 2026 revealed a fascinating behavior: ChatGPT generates its intermediate queries in two languages simultaneously — the prompt language and English. If a user asks a question in French, ChatGPT searches in French AND in English. This means half of the sources consulted can be English-language, even for a query about a Parisian dentist.

In terms of volume, ChatGPT explores massively: an average of 22.7 sources per response, and across 100 submissions of the same question, the total corpus reaches 132 unique URLs. This broad exploration explains its high variability — ask the same question 10 times and you will get different recommendations.

Sources Favored by ChatGPT

For local recommendations, an analysis of 6.8 million citations by Yext shows that ChatGPT relies heavily on third-party directories (Google Business, Yelp, TheFork) for restaurants, and on businesses’ own websites. For dentists, the dominant sources are Google Reviews, Doctolib, and practice websites.

ChatGPT also frequently cites Reddit, blogs, and editorial content such as “best X in Paris” lists. A business mentioned in an article by TimeOut, Le Fooding, or Le Figaro has a measurable advantage on ChatGPT.

ChatGPT’s Reliability

This is the weak point. The SOCi 2026 report measured an accuracy rate of about 68% for business information cited by ChatGPT. A third of addresses, opening hours, or descriptions can be inaccurate or outdated. If your online information is inconsistent, ChatGPT risks citing erroneous data — which is worse than not being cited at all.

Strategy for Appearing on ChatGPT

Be present on as many online platforms as possible (Google Business, Doctolib/TheFork/TripAdvisor, website, directories, PagesJaunes). Have content that appears in Google search results (blog, detailed service pages). Be mentioned in third-party editorial content (“best of” articles, local guides). Have bilingual French/English content if possible — even a basic English page on your site increases your chances of being found by ChatGPT’s English-language queries. And above all: maintain perfect consistency of your information everywhere, as ChatGPT cross-references dozens of sources and detects contradictions.

Perplexity: The Most Transparent, the Most Stable

Perplexity is the second AI search platform, with over 45 million active users and more than one billion monthly queries. Its positioning is distinct: it is an AI search engine, not a general-purpose chatbot.

How Perplexity Selects Its Recommendations

Perplexity works differently from ChatGPT. It performs a single search per query (versus multiple for ChatGPT), in the prompt language only, with short queries close to the original question.

The result: Perplexity uses fewer sources (about 18 per response, versus 22.7 for ChatGPT) but much more consistently. Across 100 submissions of the same question, Perplexity consults only 40 unique URLs, compared to 132 for ChatGPT. This means that if your business appears once on Perplexity, it has a good chance of staying there.

Sources Favored by Perplexity

For local Parisian businesses, Perplexity primarily cites Doctolib (for medical), TripAdvisor and TheFork (for restaurants), Google Maps and Google Reviews (all sectors), and business websites with clear, structured information. Perplexity also cites Reddit, YouTube, and specialized sites.

The major difference from ChatGPT: Perplexity displays all its sources with numbered clickable links. It is the most transparent platform, making it a trusted tool for users who want to verify information.

Perplexity’s Reliability

Similar to ChatGPT in terms of factual accuracy (about 68% according to SOCi), but the transparency of sources allows users to verify immediately. Perplexity also systematically includes verifiable references and achieves a source citation rate of 94%, making it the most reliable platform for important decisions.

Strategy for Appearing on Perplexity

Focus your efforts on the platforms that Perplexity consults most for your sector. For a dentist: Doctolib first, Google Reviews second. For a restaurant: TripAdvisor and TheFork as priorities, Google Reviews as a complement. For a hotel: TripAdvisor, Booking, and Google.

Having a rich and detailed profile on these key platforms is more effective than being superficially present everywhere. Perplexity values depth of information across a limited number of reliable sources.

Google AI Overview: The Most Accurate, the Most Conservative

Google AI Overview is not a separate platform — it is an AI layer integrated directly into Google search results. It potentially reaches all Google users, meaning virtually all internet users.

How Google AI Overview Selects Its Recommendations

Google AI Overview draws from its own index: Google Business Profile listings, organic search results, and structured data from websites. It benefits from a unique advantage: access to Google Maps, Google Reviews, and the entire Google ecosystem, with 100% accuracy on the factual data in Google Business listings.

Google AI Overview appears for about 40% of local queries, but this figure is constantly increasing. For dental, restaurant, and hotel queries in Paris, it triggers mainly on informational and comparative queries (“best dentist for implants Paris 15th”) and less on direct transactional queries (“dentist Paris 15th”).

Sources Favored by Google AI Overview

Google Business Profile listings are the primary and dominant source. Next come websites with Schema.org structured data, well-ranked organic content in standard Google results, and Google reviews. Google cross-references your listing information with your website to verify consistency — a site that confirms the GBP data strengthens the AI’s confidence.

Google AI Overview’s Reliability

It is the most reliable platform for local factual information. The SOCi 2026 report measured a 100% accuracy rate for business data cited by Gemini (Google’s AI model), compared to 68% for ChatGPT and Perplexity. This advantage comes from Google’s direct access to its own verified data (GBP listings, Google Maps).

Strategy for Appearing on Google AI Overview

Optimizing your Google Business Profile is the action with the most direct and measurable return on investment. Key elements: complete description, listed services, relevant categories, up-to-date hours, recent photos, recent reviews with responses. On your website: implement Schema.org structured data, which is a direct trust signal for Google AI. Maintain up-to-date content pages targeting informational queries in your sector.

Summary Comparison Table

Here is a synthesis of the key differences between the three platforms for a local Parisian business.

Market share. ChatGPT: about 80%. Google AI Overview: reaches all Google users. Perplexity: about 6-8%, but a highly qualified audience (30% senior executives).

Number of sources per response. ChatGPT: 22.7 on average. Perplexity: 18 on average. Google AI Overview: variable, anchored in the Google index.

Recommendation stability. ChatGPT: low (132 unique URLs across 100 tests). Perplexity: high (40 unique URLs). Google AI Overview: high (anchored in the Map Pack).

Local data accuracy. ChatGPT: 68%. Perplexity: 68%. Google AI Overview: 100%.

Dominant sources for dentists. ChatGPT: Google Reviews, Doctolib, websites. Perplexity: Doctolib, Google Reviews. Google AI: GBP listings, sites with Schema.

Dominant sources for restaurants. ChatGPT: Google Business, blogs, “best of” lists. Perplexity: TripAdvisor, TheFork, Google Reviews. Google AI: GBP listings, sites with Schema.

Source transparency. ChatGPT: sources sometimes visible. Perplexity: 100% of sources cited with links. Google AI Overview: sources partially indicated.

Response format. ChatGPT: conversational advice. Perplexity: documented synthesis. Google AI Overview: short factual summary.

The Unified Strategy: How to Be Visible on All Three

The good news: the three platforms share common fundamentals. A well-built strategy covers all three simultaneously, with marginal adjustments for each.

The common foundation (essential for all three platforms). A complete and active Google Business Profile (the shared source across all three). Recent, frequent, and detailed reviews on Google (read by all three). Consistent NAP information across all platforms (consistency is a universal trust signal).

The ChatGPT boost. Presence on as many platforms as possible (source diversity). Editorial content and mentions in third-party articles. Bilingual French/English content on the website.

The Perplexity boost. A comprehensive profile on the leading platform for your sector (Doctolib for medical, TripAdvisor/TheFork for restaurants). Detailed and verifiable information.

The Google AI Overview boost. Schema.org structured data on the website. Content pages optimized for informational queries.

This is exactly the integrated approach covered by a GEO (Generative Engine Optimization) strategy — not optimization for a single platform, but building a digital presence that all AI assistants can leverage with confidence.

Which Platform Should You Monitor First?

If you need to choose a starting point to monitor your AI visibility, here is the recommendation by sector.

For a dental practice: Start with Perplexity. It is the most generous platform for dental recommendations (73% mention rate) and the most stable. If you appear on Perplexity, you will stay there. Then work on Google AI Overview through your GBP listing.

For a restaurant: Start with Perplexity as well (89% mention rate) and ChatGPT (67%). Both are very active in the restaurant sector. Optimize TripAdvisor and TheFork as priorities.

For a hotel: All three platforms are very active in the hotel sector. Start with Google AI Overview (via your GBP listing and booking platforms) as it is the most accurate and stable channel.

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On which AI platform does your business appear — and on which is it absent? Eddie Miller Agency tests your visibility on ChatGPT, Perplexity, and Google AI as part of our free GEO audit. [Request my free GEO audit →]

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FAQ — ChatGPT vs Perplexity vs Google AI

Do I need to optimize separately for each AI platform?

No. About 80% of the work is common to all three platforms: complete Google Business listing, recent reviews, NAP consistency, structured data. The remaining 20% are platform-specific adjustments (source diversity for ChatGPT, Doctolib/TripAdvisor depth for Perplexity, Schema for Google AI). A well-built GEO strategy covers all three at once.

Which platform do my customers use most?

ChatGPT dominates in overall volume with 80% market share. But Google AI Overview potentially reaches more people since it appears directly in Google results — without the user needing to go to another platform. Perplexity is used by a smaller but highly qualified audience with strong purchase intent.

Will AI recommendations replace Google Maps?

No, they complement it. Google Maps remains the dominant channel for direct local searches. AI recommendations add a conversational layer — they come into play when a user asks an open question (“which dentist do you recommend?”) rather than a direct search (“dentist Paris 15th”). Both channels coexist and both require optimization.

Do AI results change often?

Studies show that AI responses change about 70% of the time for the same query, and about 50% of citations are replaced from one test to another. This is much more volatile than traditional Google. Perplexity is the most stable, ChatGPT the most volatile. This is why regular monitoring (monthly at minimum) is recommended.