Reddit in AI search — the most-cited domain

Reddit is the most-cited domain in LLM responses. In Peec’s 30-million-source US analysis (full study, Mar 2026), Reddit ranked #1 or #2 on every AI engine tested — ChatGPT, Google AI Mode, Gemini, Perplexity, and AI Overviews. Why AI engines trust it: Reddit captures authentic user experiences and discussions that read as more trustworthy than marketing content — real people asking real questions and getting real answers. Practical guidance from the study: monitor what Reddit says about your brand, and participate only authentically, adding real value. Reddit’s pull shows up beyond citations too (2026 data):

Grok deliberately targets Reddit with site:reddit.com searches in 10.5% of its chats — see Fan-outs per prompt by engine.
Reddit is 71% of the non-branded domains ChatGPT targets with the site: operator — see ChatGPT site-operator fan-outs.
On Google’s AI surfaces in non-English markets, 40–73% of Reddit citations point to Reddit’s own machine-translated pages — see Translated Reddit citations.

One diversification caveat from the study: both Google and ChatGPT have historically gone through periods of pulling back from Reddit, so brands with a Reddit-only community presence carry concentration risk. Source: Top domains cited by AI search: Analysis based on 30M sources, Peec (Tomek Rudzki), Mar 2026.