Which sites does AI cite in AI tools & assistants?
The index lists 216 domains cited in AI tools & assistants. youtube.com leads with 4,347 citations, or 10% of those domains' citations.
- Domains cited
- 216
- Citations measured
- 42,353
- youtube.com share
- 10%
- Top 10 share
- 16%
How each engine cites in AI tools & assistants
Citations of index domains per answer, against the same engine across the whole index. In the text of the answer: 78% in this sector, 73% across the index.
| Engine | Citations per answer | Index average | In the text |
|---|---|---|---|
 | 5.7 | 3.5 | 54% |
 | 6.9 | 5.1 | 100% |
 | 1.2 | 0.9 | 99% |
 | 4.1 | 2.3 | 100% |
 AIO | 5.4 | 3.6 | 100% |
| 12.7 | 4.6 | 41% |
AI tools & assistants ranking
Ranked by number of citations recorded over the period.
And on your own prompts?
This ranking covers the whole AI tools & assistants sector. Mentionable tracks your brand on your own prompts, every day.
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- The exact URLs cited on your prompts
- The brands recommended in your place
- All 6 engines tracked every day
- The prompts where you never show up
- The sources to work on to get in
- The questions AI engines actually ask
Frequently asked questions
Which website do AI engines cite most in AI tools & assistants?
youtube.com comes first with 4,347 citations, followed by reddit.com (2,669), synthesia.io (2,075), arxiv.org (1,602), and fr.wikipedia.org (1,424).
Do you need mentions on many sites to be visible in AI answers in AI tools & assistants?
Yes. The 10 most cited domains take only 16% of the citations: AI engines draw on 4,302 other sites in this sector.
Which AI engine relies on the most sources in AI tools & assistants?
Google AI Mode, with 12.7 citations per answer on average, against 1.2 for Gemini. Across the whole index, Google AI Mode averages 4.6.
How do you get cited by AI engines in AI tools & assistants?
Start with the sites AI engines already rely on in this sector, led by youtube.com, reddit.com, and synthesia.io. A mention on those pages puts you where engines look for their answers. On your own prompts, Mentionable shows the exact URLs cited and the brands recommended in your place.
Methodology
AIO23,321 AI responses analyzed across AI tools & assistants, on 6 engines, from February 2026 to October 2026. Citations come from the prompts tracked on Mentionable.
Latest data point: . Updated weekly.
Full methodology