The short answer
AI search went mainstream in 2026: ChatGPT reached ~900 million weekly active users and ~2.5 billion prompts a day, 39% of consumers now use AI for product discovery, and Google AI Overviews appear on ~48% of queries with a ~58.5% zero-click rate. Meanwhile an estimated 84% of brands still don't track their AI-search visibility — a gap between where buyers are and where brands are looking.
Adoption: AI is where buyers start
- ~900M weekly active ChatGPT users in early 2026; ~2.5B prompts per day.
- Google's Gemini app reached ~900M monthly active users across 230+ countries.
- 39% of consumers — and over half of Gen Z — use AI for product discovery.
- 67% of B2B buyers now start their journey with AI, adopting ~3× faster than consumers.
The click is disappearing
- Google AI Overviews now appear on roughly 48% of queries.
- AI Overviews can cut organic click-through by up to 61%.
- The zero-click rate sits around 58.5%, projected past 60% by 2027.
- Reliance on traditional search is projected to fall by as much as 25%.
What this means
If a buyer gets their answer inside the AI — a named shortlist — they may never click through to compare. Being in that shortlist is the new front page.
Source: OpenAI reported figures, aggregated 2026
That curve is the whole story: in a little over two years, a single AI assistant went from a novelty to a primary discovery surface used by hundreds of millions of people every week. Every one of those sessions is a chance for an AI to name a business — or leave it out.
Who's using AI to buy
It isn't just consumers. AI discovery is spreading fastest where the money is — B2B and high-intent purchases — because buyers there value a synthesised, cited answer over ten blue links to wade through.
| Segment | AI adoption for discovery | Why it matters |
|---|---|---|
| Gen Z consumers | Majority | The next decade of buyers default to AI |
| All consumers | ~39% | Already a third of the market |
| B2B buyers | ~67% | High-value deals, adopting ~3× faster |
The market is forming fast
- The US GEO market is projected at ~$365.4M in 2026, growing at a ~42.9% CAGR.
- 93% of CMOs and 83% of marketing teams report measurable ROI from generative AI.
- Yet an estimated 84% of brands don't track their AI-search visibility at all.
The takeaway
The behaviour has shifted faster than most brands have reacted. The businesses that start measuring — and fixing — their AI visibility now are claiming shortlist positions while their competitors are still optimising for a search box people are using less every month.
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