What the data shows
In a Semrush analysis of about 150,000 AI citations (ChatGPT, Perplexity and Google AI Overviews, June 2025), Reddit was the most cited domain at 40.1%. Wikipedia followed at 26.3% and YouTube at 23.5%. Instagram reached 10.9% and LinkedIn 5.9%.
Shares are counted per domain, so they do not add up to 100%.
Why conversations win
A thread has a question, several answers and often a verdict from people who tried the thing. For a model building an answer, that structure is close to what it needs to produce.
Video works in a similar way. The video gives the topic, and the comments give the opinions and the follow-up questions.
The conversations happening today are the AI answers of tomorrow.
What it means for a brand
- Find the threads where your audience already asks about your category.
- Answer the question being asked, before anything else.
- Mention your brand only where it is relevant to the answer.
One caveat
Each platform sets its own rules, and moderators can remove content. A mention that reads like a contribution lasts longer than one that reads like an ad. TikTok and X are not in the top 20 domains, but they are where many of those conversations start.