Insights · AI Platform Strategy

Which AI tool are your buyers actually using?

ChatGPT, Google AI, Perplexity, Claude: different B2B buyers use different AI tools, and that changes where to measure and focus your AI visibility.

Key points

  • There is no single “AI search”: different B2B buyers favour different AI tools, so the right focus depends on who you sell to.
  • ChatGPT is the mass-market default, Google’s AI reaches buyers inside ordinary search, Perplexity suits researchers because it shows its sources, and Claude is common in enterprise settings.
  • Bing Copilot and Grok matter for specific audiences: corporate Microsoft environments and tech-sector buyers respectively.
  • Spreading effort evenly across every AI platform usually dilutes the budget; it is better to weight the platforms your actual buyers use.
  • Genivista’s Gap Check measures ChatGPT, Gemini and Perplexity; the Gap Audit adds Claude and Google AI Mode.

“AI search” is a convenient phrase, but it hides something important: there is no single AI your buyers use. There are several, each with a different audience and a different character. Where you focus depends on who you are trying to reach.

Is ChatGPT the AI tool most buyers start with?

Yes, ChatGPT is where most people start. If a buyer asks an AI tool who to work with, there is a strong chance they are using this one. For broad B2B, including professional services, general technology and most other categories, it is the natural starting point for any AI visibility conversation, simply because of its reach.

How does Google’s AI change ordinary search?

Google now places AI-generated answers at the very top of search results, above the links, the ads and the organic listings. Many buyers meet this AI layer without realising it is AI at all. Appearing in the Google AI answer is, in effect, the new version of ranking first, and it reaches the very large audience already searching on Google every day.

Why do researchers favour Perplexity?

Perplexity is favoured by people who research thoroughly, because it shows its sources: you can see where each claim comes from. That makes it popular with analysts, consultants, clinicians and senior buyers, and especially relevant in professional services, medical devices and financial services, where decisions are evidence-led and shortlists are built carefully.

Who uses Claude?

Claude is widely used inside large organisations, where procurement teams, technical leads and enterprise buyers evaluate vendors. If you sell to large companies, or are building towards enterprise clients, being recommended in Claude means being considered at the level where serious decisions are made.

Do Bing Copilot and Grok matter?

They matter for specific audiences rather than for everyone. Bing Copilot is built into Microsoft Edge and Windows, which makes it the default AI assistant in many corporate environments. Grok is growing among tech-sector audiences. Neither is for everyone, but for the right buyer they count.

Which AI platforms should I focus on?

Focus on the platforms your buyers actually use, not on every platform at once. Spreading effort evenly is how budgets get diluted and nothing moves. As a rough guide:

  • Selling broadly to business? ChatGPT and Google’s AI carry the most weight.
  • Selling to research-driven professionals in medtech, finance, legal or consulting? Perplexity earns disproportionate attention.
  • Selling to large enterprises? Claude matters more than its overall usage suggests.
  • Operating in Microsoft-heavy corporate environments? Do not overlook Bing Copilot.

A Genivista Gap Check asks buyer questions live on ChatGPT, Gemini and Perplexity. The Gap Audit measures five platforms (ChatGPT, Gemini, Perplexity, Claude and Google AI Mode), using questions written for six buyer personas.

What is the takeaway?

The platform question is really a buyer question. Decide who you are trying to reach, work out which tools they reach for, and concentrate there. Measuring first makes that concrete: a Gap Check shows where you stand against the competitor AI recommends instead, and the Gap Audit shows why, platform by platform, and what to fix first.

Questions

Which AI tool do most B2B buyers use?

ChatGPT has the broadest reach and is the usual starting point for general B2B. But it depends on the audience: Perplexity is favoured by research-led professionals, Claude is common in enterprise settings, and Google’s AI reaches buyers inside ordinary search.

Why does Perplexity matter for professional and medtech buyers?

Perplexity shows its sources, which appeals to people who research carefully, such as analysts, consultants, clinicians and senior buyers. In evidence-led sectors like medical devices, financial services and legal, that makes it disproportionately important when buyers build a shortlist.

Should I try to appear in every AI platform?

Usually not. Spreading effort evenly across every platform dilutes the budget and rarely moves anything; it is more effective to weight the platforms your actual buyers use and concentrate there.

Which platforms does Genivista cover?

The Genivista Gap Check measures ChatGPT, Gemini and Perplexity. The Gap Audit measures five platforms: ChatGPT, Gemini, Perplexity, Claude and Google AI Mode.

Related

Cite this article: Neil Harte, “Which AI tool are your buyers actually using?”, Genivista, 27 May 2026. https://www.genivista.com/insights/which-ai-answer-engine-are-your-buyers-using

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