How ChatGPT, Gemini & Perplexity Decide Which Brands to Recommend

By Pradeep Dabas

If you have ever asked an AI tool, “What’s the best CRM for a small business?” or “Which accountant should I use in Dublin?”, you have seen the new kind of discovery.

These tools do not just list links. They try to give you a confident answer. That means brands can win or lose visibility before a person even opens a website.

Let’s look at how ChatGPT, Gemini, and Perplexity decide what to mention, what to cite, and what to recommend in 2026.

What “Recommend” Actually Means In AI Search

When people say “AI recommended my brand”, they usually mean one of three things:

A Direct Recommendation

The AI explicitly names brands, compares them, and suggests a shortlist.

A Cited Source

Your website or content is used as evidence in the AI’s answer, usually shown as citations or a sources list.

A Local Suggestion

The AI suggests a nearby provider, often based on location signals, reviews, and business listings.

Those are not the same outcome, and they often come from different signals.

The Three Layers Behind Most AI Brand Mentions

Across ChatGPT, Gemini, and Perplexity, the “decision” is typically a blend of three layers.

The Model’s Built-In Knowledge

Each tool has a trained model that has learned patterns from large volumes of text. This is where general awareness of well-known brands, categories, and common pros and cons can come from.

Live Web Retrieval

For many queries, the tool will pull in fresh information from the web and then write an answer based on what it finds. ChatGPT from Open AI is able to search the web and provide links to sources.

Google describes “grounding with Google Search” for Gemini as connecting the model to real-time web content, improving accuracy and allowing citations.

Perplexity explicitly frames its product as compiling relevant insights into a coherent answer and providing numbered citations to original sources.

Safety, Policy, and Framing Rules

All three have guardrails. They may avoid certain claims, refuse risky topics, or prioritise safer, verifiable sources. This can affect which brands appear, especially in health, finance, and anything that could cause harm.

How ChatGPT Decides Which Brands To Mention

ChatGPT can answer from its general training, but for up-to-date, niche, or verifiable answers it can use ChatGPT search and show citations you can click. When search is used, you will see inline citations and a Sources view.

What Typically Pushes A Brand Into The Answer

When ChatGPT is operating in “web-backed” mode, brands tend to appear when they match the intent and are easy to justify with sources.

Signals that help:

  • Clear relevance to the specific question (industry, budget, location, constraints).
  • Strong third-party coverage (credible reviews, reputable publications, documentation, standards bodies).
  • Pages that answer the question directly, using plain language and scannable structure.
  • Freshness for fast-changing categories (AI tools, software pricing, regulation, “best in 2026” lists).

You can prompt it to search, or it may choose to search depending on what you ask.

What Makes ChatGPT Less Likely To Recommend You

  • Thin content that does not actually answer anything.
  • Overly promotional pages that read like ads rather than explanations.
  • No proof outside your own website. If the only place you claim you are “the best” is your own homepage, that is hard to justify.
  • Paywalled or inaccessible evidence. If key information cannot be reached, it is less likely to be used as a source.

Tip: if you want to see how much web retrieval is influencing an answer, ask ChatGPT to include sources, then check whether it shows citations.

How Gemini Decides Which Brands To Mention

Gemini is a family of tools, but for brand discovery the important bit is that Gemini can be connected to Google’s live search systems through “grounding”.

Grounding with Google Search lets Gemini access real-time information, reduce hallucinations, and provide citations.

Gemini’s “Sources” Behaviour Matters

Gemini shows sources in certain cases, such as when it uses a lot of direct quoted text or when it includes an image from the web. This shows what it trusted enough to reference.

What Typically Gets Gemini To Surface A Brand

Gemini is heavily influenced by Google’s world of signals, especially when grounding or search-like behaviour is involved.

Signals that usually help:

  • Entity clarity: Google needs to understand your business as a “thing” (a named entity), not just a vague website.
  • Strong on-page explanations: clear service pages, FAQs, comparisons, pricing approach, processes.
  • Reliable external validation: reputable mentions, professional directories, review platforms, industry associations.
  • Local trust: for local queries, business listings, reviews, and consistent contact details become more important.

AI Overviews and AI Mode are experiences that provide an AI-generated snapshot with links to learn more.

What Can Hold Gemini Back

  • Inconsistency across the web (different addresses, phone numbers, business name variations).
  • No real detail on the website (lots of marketing language, not much substance).
  • Unclear specialisation: if you do “everything”, the AI struggles to match you to a specific intent.

How Perplexity Decides Which Brands To Mention

Perplexity is the most transparent of the three in one key way: it is built around citations. Each answer includes numbered citations linking to the original sources.

These recommendations often map closely to “which sources does it find credible enough to cite for this question?”

Perplexity Is Very Sensitive To Accessibility

Perplexity has specific guidance for website owners on crawlers and robots.txt. Its documentation includes “Perplexity Crawlers” and how to manage access. 

It also states that it respects robots.txt, and if content is blocked, it may still index a domain, headline, and brief factual summary rather than full text content.

That means an easy win is simply making sure:

  • Your key pages are crawlable
  • Your content is readable without heavy scripts
  • Important information is not locked behind barriers

What Typically Gets You Cited (And Then Mentioned)

  • A page that answers one question extremely well
  • Structured writing: headings, short paragraphs, clear definitions
  • Verifiable details: numbers, steps, standards, dates, and references
  • Credible context: the page shows it understands the topic and its trade-offs

If Perplexity can cite you, it is much more likely to mention your brand name naturally in the answer.

Why Prompts And Personal Context Change The Brand List

Here’s the part most businesses miss: AI recommendations are not fixed rankings.

If a user says:

  • “I’m in Ireland”
  • “My budget is under €200 a month”
  • “I need GDPR compliance”
  • “I’m a two-person team”
  • “I want something that integrates with Xero”

You have just changed the selection criteria.

These tools are trying to satisfy the specific user, not crown one universal “best” brand.

That is why your content needs to spell out:

  • Who you are for
  • Who you are not for
  • Your pricing approach or typical ranges
  • Your differentiators in plain language
  • Your constraints and trade-offs (yes, even the boring bits)

Clarity beats hype in AI search.

What You Can Do To Be “Recommendable” In 2026

This is the practical bit. If you want to show up more often, focus on becoming easy to trust and easy to cite.

Publish “Answer First” Pages

Create pages that lead with the answer, then prove it. Think:

  • “How much does X cost in Ireland?”
  • “X vs Y: which is better for small teams?”
  • “What to check before choosing a supplier”

Make it genuinely useful. These tools favour pages that reduce uncertainty.

Build Third-Party Proof

AI tools are cautious about self-claims. You need proof outside your own site:

  • Reviews on major platforms
  • Industry partnerships
  • Case studies with real detail
  • Mentions in reputable publications

Keep Local Signals Clean

If you serve Ireland, be unmissable about it:

  • Clear service areas
  • Consistent name, address, phone number
  • A strong Google Business Profile for local intent queries

Make Your Site Easy To Crawl

Especially for Perplexity-style discovery:

  • Avoid hiding key content behind heavy scripts
  • Ensure critical pages are accessible
  • Do not block the tools you want to be seen by (check robots.txt carefully)

Update Important Pages Regularly

If your category changes quickly, show that your content is current. Add an “Updated” date where it matters and refresh stats, pricing assumptions, and product comparisons.

Why This Matters More In Ireland Right Now

AI tool usage is rising in Irish workplaces, which usually mirrors consumer behaviour not long after. PwC’s 2025 Workforce Hopes and Fears survey notes Irish respondents using AI at work has increased, with daily usage rising year on year.

The more people use these tools to shortlist providers, the more your “AI visibility” becomes a real growth lever.

ChatGPT, Gemini, and Perplexity do not recommend brands the way a traditional search engine ranks pages. They are trying to build a justified answer using a mix of model knowledge, live web retrieval, and trust signals.

If you want to be included, the play is simple to say and harder to do: be the clearest, most credible, most citable source for the questions your customers actually ask.

Get seen in AI answers, not just search results.

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