Definition
AI-powered search tools are the consumer and professional products that use language models to search the web and answer in written form, such as ChatGPT, Google AI Overviews and AI Mode, Perplexity, Microsoft Copilot, the Gemini app, Claude, Grok and Meta AI. Where AI search describes the method, this term covers the products people actually use, which differ in reach, retrieval and how they send traffic to websites.
The tools fall into a few groups:
- Assistants with built-in search: ChatGPT, the Gemini app, Claude, Grok and Meta AI answer from training data and search the web when a question needs fresh information.
- AI layers inside search engines: Google AI Overviews and AI Mode, and Microsoft Copilot built on Bing.
- Answer engines built around search: Perplexity, which cites sources on every answer.
- AI browsers and research agents: products such as ChatGPT Atlas and Perplexity Comet that browse and act on pages, and deep research modes that run dozens or hundreds of searches for one report.
Reach is uneven. OpenAI said on August 31, 2026 that ChatGPT had more than 1 billion weekly active users. Google said in May 2026 that AI Overviews had more than 2.5 billion monthly users and AI Mode more than 1 billion, and Alphabet put the Gemini app at 950 million monthly active users in July 2026. Referral traffic is even more concentrated. SE Ranking's study of 101,574 websites for January to April 2026 found ChatGPT sent 74.78% of AI referral visits, followed by Gemini at 11.56%, Perplexity at 7.23%, Copilot at 3.51% and Claude at 2.62%. Google's AI features are not in that count because their clicks arrive as ordinary Google organic traffic.
The tools also differ in what they retrieve. Google's AI features use Google's index and ranking systems. Perplexity runs its own index, which it said in September 2025 tracks more than 200 billion URLs. ChatGPT search uses OpenAI's OAI-SearchBot crawler and third-party providers. Copilot draws on Bing. Some tools answer many questions from training data alone and cite nothing. As a result, a brand can be well cited on one tool and absent on another for the same question.
Monetization now separates them too. ChatGPT, Google and Copilot sell ads next to or inside answers; Perplexity dropped ads and Anthropic says Claude will stay ad-free.
For GEO, the practical step is to choose which tools matter for your audience and track each one separately, because blended numbers hide the platform where you are losing. Check your analytics for which tools already send visits, allow the crawlers each tool depends on, and test your key prompts in every tool on your list. Our guide to how ChatGPT searches the web shows how one of these tools retrieves and cites.
Examples of AI-Powered Search Tools
- A B2B marketer checks GA4 and finds chatgpt.com sends 80% of the site's identifiable AI referrals, Perplexity 9% and Copilot 4%, and sets tracking priorities in that order.
- A hotel group discovers it is cited in Google AI Mode for 'quiet hotels near Lisbon airport' but missing from ChatGPT, then finds its robots.txt had been blocking OAI-SearchBot.
- A researcher uses Perplexity for a market sizing question because every claim links to a source, then runs the same question through Gemini Deep Research for a longer report.
- An ecommerce team tests its product category in ChatGPT, AI Mode and Copilot, and sees shopping carousels in two of them, each pulling prices from different merchant feeds.
