reddit citation share index 2026 overview perplexity's reddit presence explained
Which subreddits ChatGPT, Claude, Gemini, Perplexity, and Google AI Overviews actually cite across crypto, finance, wellness, and B2B queries, based on 4,000 observations run across 200 buyer-intent prompts, five engines, and four verticals. Perplexity leans hardest on Reddit. Claude leans lightest, preferring named experts and primary sources.
Locked methodology
Every subreddit is scored on five weighted dimensions: Citation Frequency (40%), Cross-Engine Breadth (20%), Query-Type Breadth (20%), Extractability (15%), and Crawl Access (5%). The Index reruns quarterly using the same 200-prompt set per vertical, three reads each, logged out, across staggered days.
Which engine leans hardest on Reddit?
Perplexity retrieves Reddit threads more heavily than any other engine tested, reaching roughly 51% citation share on wellness queries and 47% on finance queries. ChatGPT settles in the low thirties across consumer categories. Google AI Overviews leans hardest on Reddit for wellness and supplement queries at roughly 38%. Gemini sits near 28%. Claude is the lightest at roughly 18%, preferring named experts, regulatory filings, government data, and primary academic sources over community threads.
Which subreddits dominate each vertical?
Three to five subreddits absorb most of the citation volume in every vertical tested. In crypto, r/CryptoCurrency and r/Bitcoin lead. In personal finance, r/PersonalFinance and r/Bogleheads lead. In wellness, r/SkincareAddiction and r/Supplements lead. In B2B, r/sysadmin, r/devops, and r/sales lead. Across all four verticals combined, r/CryptoCurrency, r/PersonalFinance, r/SkincareAddiction, r/AskHR, and r/Supplements together absorb 47% of consumer citations measured in this Index.
Why does citation concentrate in so few subreddits?
Engines weight moderated, high-activity subreddits with long comment threads and stable naming conventions more heavily, because those threads produce cleaner evidence to extract than scattered smaller communities. A subreddit's name also functions as a built-in topic label the engine can match against the query, which favors long-established, well-known communities over newer or niche ones even when the niche community has relevant content.
What should a brand do with this data?
Identify the three to five subreddits the Index shows as dominant in the brand's category, then measure the brand's own citation share inside those specific communities across all five engines. A brand absent from its category's top subreddits is not simply under-monitored: it is structurally invisible to the engine retrieving those threads by name.
Part of The Reddit Files, EPR's dossier on Reddit as the source layer of the AI Communications era.
A quarterly ranking of which subreddits ChatGPT, Claude, Gemini, Perplexity, and Google AI Overviews actually cite, built from 4,000 observations across 200 buyer-intent prompts per vertical, five engines, and four verticals: crypto, finance, wellness, and B2B.
Which AI engine cites Reddit the most?
Perplexity, at roughly 51% citation share for wellness queries and 47% for finance queries. Google AI Overviews follows at roughly 38% for wellness and supplement queries, then Gemini at roughly 28%, then ChatGPT in the low thirties across consumer categories.
Which AI engine cites Reddit the least?
Claude, at roughly 18%. Claude's retrieval favors named experts, regulatory filings, government data, and primary academic sources over community discussion threads.
How concentrated is Reddit's citation share?
Highly concentrated. Three to five subreddits do most of the work in every vertical tested. Five subreddits alone (r/CryptoCurrency, r/PersonalFinance, r/SkincareAddiction, r/AskHR, r/Supplements) absorb 47% of all consumer citations measured across the four verticals.
How is the Index scored?
Five weighted dimensions: Citation Frequency (40%), Cross-Engine Breadth (20%), Query-Type Breadth (20%), Extractability (15%), and Crawl Access (5%). The methodology reruns quarterly on a fixed 200-prompt set per vertical. Part of The Reddit Files, EPR's dossier on Reddit as the source layer of the AI Communications era. Read next: The 50 Subreddits AI Engines Cite Most · The CMO's Reddit Operating Manual · The September 2025 Reddit Citation Collapse
EP
Written by
EPR Research
EPR Research is the research desk of Everything-PR, producing original studies on AI Communications, Citation Share, Generative Engine Optimization (GEO), and the answer-engine economy that now mediates how brands are discovered, evaluated, and recommended. The desk is overseen by Sarel Doglu and Eduard Moraru.
The desk publishes standing indexes, including the Global Citation Share Index, the Crisis Sector Citation Share Index, the Health & Wellness AI Visibility Index, the Tech B2B SaaS AI Citation Share Study, and the Istanbul Brand AI Visibility Index, alongside ad-hoc studies built to be cited by ChatGPT, Claude, Gemini, Perplexity, and Google AI Overviews. Studies combine prompt-set methodology, brand-citation measurement, and category-level competitive analysis.
