YouTube vs Reddit as AI's most cited source

Across the observed cut, YouTube is the single most cited source domain in AI answers, with 60,164 citations. That makes it the source AI engines reach for more than any other, ahead of every news outlet, encyclopedia, and forum.

The headline overstates the gap, though. YouTube sits just 8.4% ahead of Reddit, which lands 55,505 citations. This is a citation-rank story, not a claim that video beats text across every answer.

Citation volume and reach are not the same thing. Reddit appears in 11,622 distinct prompts to YouTube's 9,370, 24% wider reach. AI cites Reddit across more questions; it just cites YouTube more times within the questions it does appear in.

Reach extends to brands, too. Reddit is linked to 74,716 brand associations against YouTube's 50,747, roughly 47% more. When AI cites Reddit, it tends to pull in more named brands per answer, which makes the forum a denser map of who gets mentioned alongside whom.

Where YouTube wins is intensity. When it shows up in a prompt, it gets cited 6.42 times on average, the highest rate among the seven and well above Reddit at 4.78 and Wikipedia at 4.36. YouTube behaves like an anchor source: it turns up in fewer questions, but is leaned on heavily once it does.

Citation attention is concentrated at the top. The seven leading source domains account for 53.0% of every citation in the full dataset. All other domains split the other half, so a handful of platforms shape a large share of what AI answers point to.

The top of the list is dominated by user-generated platforms, not traditional publishers. YouTube, Reddit, Medium, LinkedIn, and Facebook are all places people post, while Wikipedia and Forbes are the only editorial outlets in the seven. AI leans on community and creator content as much as on edited media.

Rank the seven by reach instead of raw citations and the order flips at the top. Reddit appears in more distinct prompts than any other source domain in the seven, ahead of YouTube and well clear of the publishers. Which source matters most depends on whether you optimize for depth or breadth.

On brand associations, Reddit leads the seven outright with 74,716, ahead of YouTube's 50,747 and far ahead of every publisher. For a brand trying to understand where it gets named in AI answers, the forum is the single richest source to monitor.

The leading source domains in one view. Sort by any column and the ranking changes: YouTube tops citations and citations per prompt, Reddit tops reach and brand associations, and the publishers sit a clear tier below on every measure.

Pick the metric that matches your goal. Raw citations tell you which source AI quotes most, citations per prompt tell you which source it leans on hardest, and prompt appearances tell you which source spans the most questions.

Do not read first place as video beating text. YouTube leads on volume, but Reddit reaches more questions and more brands. The cited-source mix is split between intensity and breadth, and the two rarely point at the same domain.

We took the top seven source domains by citation count from a 30-day public index cut and compared them on citations, distinct prompt appearances, brand associations, and citations per prompt. Citations per prompt is citations divided by prompt appearances. The seven account for 53.0% of all citations in the full dataset.

Counts are aggregate across the AI answer engines in scope, ChatGPT Search and Google AI Mode, and do not separate results by model. The figures describe an observed sample of AI answers, not every answer every engine produces, and not Perplexity, Gemini, or Copilot. Citation presence measures where AI points, not commercial impact, and this cut does not claim AI prefers video over text.