> ## Documentation Index
> Fetch the complete documentation index at: https://docs.peec.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# ChatGPT vs Google — the real search market share

> Peec's two-method estimate (Oct 2025) puts ChatGPT at 4–12% of Google's search volume — roughly 600 million searches per day — far above the 0.6% suggested by click data alone.

ChatGPT's real search volume is roughly 4–12% of Google's — far more than click data suggests. Peec's analysis ([full study](https://peec.ai/blog/the-real-search-engine-market-share-of-chatgpt), Oct 2025) corrects the widely quoted 0.6% figure from Ahrefs click data, which undercounts ChatGPT because ChatGPT answers directly and rarely needs a click, while Google's blue links demand them.

Two independent methods converge:

* **Usage data:** OpenAI/Harvard research (Sep 2025) reports 2.5 billion ChatGPT prompts per day, 24% classified as information-seeking → \~600 million searches/day, vs Google's \~14 billion → **4.3%**.
* **Referral traffic adjusted for CTR:** Google converts \~40% of searches to external clicks; AI-answer surfaces convert \~5% (iPullrank measured 3.8–5.4% for Google AI Mode; Semrush \~3–7%). Re-basing the Ahrefs click ratio on those CTRs yields **4.6%**, or up to 12% if ChatGPT's CTR is as low as 2%.

Bottom line (Oct 2025 estimates): ChatGPT processes roughly 500 million to 1.7 billion searches per day; Google is 8× to 22× bigger by search volume — but ChatGPT is more than an order of magnitude bigger than click-through data implies. Google's own AI surface is larger still: AI Overviews reaches 2.5 billion monthly users — see [How often AI Overviews appears](/research/ai-overviews-how-often-it-appears).

**Source:** [The real search engine market share of ChatGPT](https://peec.ai/blog/the-real-search-engine-market-share-of-chatgpt), Peec (Malte Landwehr), Oct 2025.