If you’re still optimizing purely for Google’s blue links, you’re fighting last decade’s war. There’s a new battlefield: getting cited inside the answer when someone asks ChatGPT, Perplexity, or Google AI Mode a question — and the leaderboard looks nothing like classic SEO.
Semrush analyzed 325,000 unique prompts across ChatGPT Search, Perplexity, and Google AI Mode in January 2026 to see which domains actually get cited when these tools generate answers. The results reshuffle a lot of assumptions about what “authority” means in the AI era.
The Top 20, Ranked
| Rank | Domain | Citation Share |
| 1 | reddit.com | 11.29% |
| 2 | linkedin.com | 11.03% |
| 3 | wikipedia.org | 9.53% |
| 4 | youtube.com | 8.77% |
| 5 | medium.com | 5.83% |
| 6 | facebook.com | 5.55% |
| 7 | mapbox.com | 4.76% |
| 8 | openstreetmap.org | 4.59% |
| 9 | nih.gov | 4.58% |
| 10 | instagram.com | 3.70% |
| 11 | forbes.com | 3.43% |
| 12 | google.com | 3.18% |
| 13 | quora.com | 2.82% |
| 14 | sciencedirect.com | 2.14% |
| 15 | blog.google | 2.14% |
| 16 | researchgate.net | 2.13% |
| 17 | mdpi.com | 2.03% |
| 18 | yahoo.com | 1.96% |
| 19 | businesswire.com | 1.93% |
| 20 | amazon.com | 1.80% |
Figures represent average share of AI responses containing a citation to that domain, per Semrush’s 325K-prompt study.
Three Things That Should Surprise You
1. Reddit and LinkedIn are basically tied at the top — and neither is a “traditional” authority site. No .gov domain, no legacy news outlet, no encyclopedia cracks the top two. Instead, it’s a forum built on unmoderated opinions and a professional network built on personal posts. This tracks with what other 2026 studies are finding: LinkedIn has been on a genuine tear, climbing from roughly 11th place on ChatGPT in November 2025 to 5th by February 2026 — one of the sharpest authority shifts anyone’s tracked all year. For B2B, career, or software-related questions, LinkedIn is now the single most-cited domain across major AI platforms.
2. Wikipedia — the internet’s default “source of truth” — isn’t even #1. It sits at a respectable 9.53%, but it’s been leapfrogged by two platforms full of first-person, community-generated content. That’s a real shift in what LLMs treat as trustworthy: less “curated encyclopedia entry,” more “real person describing real experience.”
3. This list is genuinely volatile — don’t get too attached to it. Reddit’s citation share has swung wildly over the past year. Separate Semrush tracking found ChatGPT’s Reddit citations cratering from around 60% of responses to roughly 10% within about six weeks in late summer 2025, before partially recovering. Forbes, meanwhile, roughly doubled its ChatGPT citation share in that same window. If you’re building a content or PR strategy around today’s snapshot, know that “today’s snapshot” might look different by next quarter.
Why This Matters (Even If You Don’t Run an SEO Team)
Traditional search rewarded the single “best” page for a query — that’s why the top 10 Google results have historically captured roughly two-thirds of all clicks. AI search doesn’t work that way. Even the most-cited domain on any given platform rarely breaks 5% of total citations when you zoom out across the full universe of prompts — the other 95%+ is scattered across thousands of sources. It’s a long-tail game, not a winner-take-most game.
That has real implications:
- Community platforms now matter as much as owned media. A well-placed Reddit thread or LinkedIn post can outperform a polished blog article when it comes to actually showing up inside an AI answer.
- Different engines have very different tastes. Perplexity leans hard into Reddit and live-crawled content; Google AI Mode has a clear preference for Google’s own properties (hence blog.google and google.com both cracking the top 15); ChatGPT and Google AI Mode favor individual LinkedIn creator content, while Perplexity favors LinkedIn Company Pages. A single “AI visibility” strategy doesn’t work across all three.
- Niche, structured data sources punch above their weight. Mapbox and OpenStreetMap both outrank Instagram, Forbes, and Amazon — a reminder that AI tools reach for precise, structured data (like geographic information) whenever a query calls for it, regardless of the site’s general fame.
The Bottom Line
The AI citation leaderboard isn’t a copy of the Google SERP — it’s closer to a reputation graph built from community trust, structured data, and individual expertise, refreshed on a timescale of weeks, not years. If your brand’s visibility strategy still stops at classic SEO, this data is a pretty clear signal that Reddit threads, LinkedIn posts, and Wikipedia-adjacent credibility now belong in that plan too — while accepting that this leaderboard, more than any Google ranking before it, can and will keep reshuffling.
References
- Semrush — Top Domains Cited by LLMs, January 2026 (original infographic/study) — https://www.semrush.com/blog/most-cited-domains-ai/
- Semrush — We Analyzed 89K LinkedIn URLs Cited in AI Search — https://www.semrush.com/blog/linkedin-ai-visibility-study/
- Contently — Top 10 Sources LLMs Cite Most in 2026 — https://contently.com/2026/04/29/top-sources-llms-cite/
- Statista — Most Cited Domains by LLMs Worldwide, 2026 — https://www.statista.com/statistics/1660293/most-cited-domains-by-llms-worldwide/
- Everything-PR — The AI Platform Citation Source Index 2026 — https://everything-pr.com/ai-platform-citation-source-index-2026
Ganesh Jalla is a highly skilled SEO consultant with over 8 years of experience in the digital marketing industry. With a focus on driving organic traffic and maximizing online visibility, Ganesh and his team at Search Sprout provide tailored solutions to help businesses thrive in today’s competitive landscape.
