Which websites do AI engines cite most?
When an AI answers someone in your market, it leans on sources. The Mentionable Index tracks which ones, engine by engine, from real scans.
- Domains tracked
- 12,870
- Responses analyzed
- 363,901
- Engines queried
- 7
By market
Every market has its own reference sources. AI engines do not cite the same sites across them.
Most cited domains
An engine lists more sources than it cites in its text. The last column is the share that makes it into the answer itself.
Frequently asked questions
Which websites do AI engines cite most?
From February 2026 to October 2026, the domains most cited by ChatGPT, Claude, Perplexity, Gemini, Copilot, Google AI Mode, and Google AI Overview are google.com (47,089), youtube.com (37,890), reddit.com (36,823), instagram.com (8,578), and danielfeau.com (7,371).
Do all AI engines cite the same sources?
No. The most cited domain changes from one engine to the next: reddit.com for ChatGPT, junot.fr for Claude, zipdo.co for Copilot, reddit.com for Gemini, google.com for Google AI Overview, google.com for Google AI Mode, and youtube.com for Perplexity.
How many of its sources does an AI engine put in the text of its answer?
75% of the citations recorded appear in the text of the answer. The rest sits in the list of sources, outside the text. Engines differ widely: Perplexity puts 100% in its text, Google AI Mode 47%.
Where do the Mentionable Index figures come from?
From 363,901 AI answers recorded by Mentionable from February 2026 to October 2026, across 7 engines.
Methodology
AIO
363,901 AI responses analyzed, on 7 engines, from February 2026 to October 2026. Citations come from the prompts tracked on Mentionable.
Latest data point: . Updated weekly.
Full methodology