TL;DR: LinkedIn is the single biggest mover in AI citations over the past year — climbing from roughly #11 to #5 among all domains ChatGPT cites, and it's the #1 most-cited source specifically for professional and B2B queries across every major AI platform. Reddit remains huge but volatile, at times swinging from 60% of ChatGPT responses down to 10% within weeks. No single platform dominates the way Google's top result used to: even the most-cited domain on any AI engine rarely exceeds 5% of total citations. The practical takeaway is platform-specific — what works for Perplexity often doesn't work for ChatGPT.
The Big Shift: It's Not a Winner-Take-All Market
Traditional SEO trained everyone to think in terms of "the top result." AI citation doesn't work that way. An analysis of 200 million prompts found that even the single most-cited domain on any AI platform rarely captures more than 5% of total citations — the other 95%+ spreads across thousands of sources. That's a fundamentally different distribution than search rankings, where the top 10 results typically capture roughly two-thirds of all clicks.
What that means practically: there is no single platform you can dominate and consider your AI visibility "solved." Citation share is a long tail with a handful of outsized outliers — and those outliers are worth understanding in detail, because even a 1-5% share carries disproportionate influence on how AI systems describe an entire category.
Platform-by-Platform: What the Data Actually Shows
| Platform | Strongest On | Key Data Point | Volatility |
|---|---|---|---|
| B2B / professional queries | #1 cited domain for professional queries across all 6 major AI platforms; 14.3% of ChatGPT responses | Rising steadily | |
| Perplexity, general consumer queries | Up to 1 in 5 citations on Perplexity; historically ChatGPT's top source | Highly volatile | |
| YouTube | Video / how-to queries, Google AI Mode | Dominant for citations requiring video transcripts and descriptions | Stable, growing |
| Wikipedia | ChatGPT factual/definitional queries | ~12% of ChatGPT citations; still a top source despite a sharp mid-2025 dip | Volatile |
| G2 / Capterra / Trustpilot | "Best tool for X" / software comparison queries | Directly influences software and B2B product recommendations | Stable |
LinkedIn: The Biggest Mover, and Why It Matters Most for B2B
The single clearest trend in recent citation data is LinkedIn's climb. Independent research tracking 1.4 million citations found LinkedIn moved from roughly the 11th most-cited domain on ChatGPT to the 5th in the space of about three months — the largest authority shift researchers observed that year. For queries specifically tied to career, B2B, software, or industry topics, LinkedIn is now the single most-cited domain across every major AI platform: ChatGPT, Gemini, Google AI Overviews, AI Mode, Copilot, and Perplexity.
What makes LinkedIn's rise especially relevant for a B2B brand: ChatGPT and Google AI Mode pull the majority of their LinkedIn citations from individual posts, not company pages — roughly 59% from individual creators versus 41% from company accounts. Perplexity inverts this almost exactly, favoring company pages 59% of the time. The practical implication: a founder or executive publishing substantive, opinionated posts is currently a stronger AI-citation asset on ChatGPT specifically than the company page alone — but you need both, since Perplexity weighs them oppositely.
Reddit: Enormous Influence, Enormous Volatility
Reddit tells a very different story. At its peak, ChatGPT cited Reddit in close to 60% of prompt responses — then that share collapsed to roughly 10% within about six weeks, before partially stabilizing. Researchers attribute swings like this to AI platforms deliberately adjusting how much they lean on any single source to diversify answers, not to anything a brand did. Despite the volatility, Reddit remains one of the two or three most-cited domains on ChatGPT and Perplexity, and on Perplexity specifically it can account for as much as one in five citations — the highest concentration of any single domain on any platform studied.
The signal AI systems appear to reward on Reddit isn't link authority — it's discussion depth and community validation. One study of over 129,000 domains found businesses with a strong organic Reddit mention presence averaged nearly 4x more ChatGPT citations than businesses with minimal Reddit presence. Promotional posts get filtered out quickly by both moderators and AI ranking signals; genuine participation in category-relevant subreddits is what compounds.
What This Means for Where You Actually Spend Time
- B2B and professional services brands: LinkedIn is your highest-leverage platform right now — invest in both a founder/executive personal presence (for ChatGPT and Google AI Mode) and an active company page (for Perplexity).
- Software and tools companies: G2, Capterra, and Trustpilot presence directly shapes "best tool for X" recommendations — this is a review-platform problem more than a content problem.
- Consumer and general-audience brands: Reddit participation matters, but treat it as a long-term community investment, not a citation hack — and don't panic if your Reddit-driven citation share swings sharply from one month to the next, since that volatility is largely platform-driven, not brand-driven.
- Everyone: Don't concentrate effort on one platform. Given how thin even the top-cited domain's overall share is, a multi-platform presence (LinkedIn + at least one of Reddit/YouTube/reviews) outperforms a deep investment in just one.