Author: GeoParrot Team
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We Asked 4 AI Engines the Same 15 Questions — Only 0.5% of Sources Overlapped
The raw results from our pre-registered GEO Lab experiment. Across 4 AI engines and 15 buyer-intent questions, 386 cited domains — and only 0.5% were cited by all four. Two predictions hit, one surprised us. Here’s every number.
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How We’re Testing Whether One GEO Strategy Works Across AI Engines (Our Method)
We claimed there’s no universal GEO strategy. Now we’re proving it. Here’s the full, pre-registered method for our 4-engine, 15-question citation experiment — predictions locked in before we collect a single data point.
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Is There One GEO Strategy for Every AI Engine? The 2026 Data Says No
Google just made AI Mode the default for 1B+ users. But new 2026 data shows AI engines cite almost no sources in common. Here’s why there is no universal GEO strategy — and what to do instead.
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What Is LLM SEO (a.k.a. LLMO)? And Why It’s Really Just GEO
LLM SEO (also called LLMO, Large Language Model Optimization) is optimizing content so large language models like ChatGPT and Perplexity surface and cite it. Here’s what the terms mean, how they relate to GEO and AEO, and why they’re the same discipline under a new label.
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What Is Answer Engine Optimization (AEO)? The Complete 2026 Guide
Answer Engine Optimization (AEO) is structuring your content so answer engines — featured snippets, AI Overviews, ChatGPT, Perplexity, voice assistants — extract and surface your answer directly. Here’s what AEO is, how it differs from SEO and GEO, and how to do it.
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What Is llms.txt? A Complete 2026 Guide (With Real Data on Whether It Works)
llms.txt is a Markdown file at your site’s root that maps your key pages for AI models — a “robots.txt for AI.” Here’s what it is, what it looks like, and whether AI search engines actually read it, backed by 2026 data.
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We Asked 3 AI Engines the Same 12 Questions — They Cite Almost Nobody in Common
GEO Lab experiment: we asked Perplexity, Google, and ChatGPT the same 12 GEO questions. Of 231 cited domains, only 3% were cited by all three and 84% by just one. There is no single “AI SEO” — here’s the data.
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Is llms.txt Worth It? What 137,000 Websites Reveal (2026 Data)
The largest study yet (137,210 domains) shows 97% of llms.txt files get zero requests, and AI search bots account for just 1.1% of fetches. Here’s the honest verdict on whether llms.txt is worth it for GEO in 2026 — and what to do instead.
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Best GEO Tools 2026: AI Search Visibility Trackers (Free Options Included)
The best GEO tools in 2026 by size — start free with Bing Webmaster Tools, then Otterly.AI, Peec AI, SE Ranking, and Profound for enterprise. An honest, hands-on comparison with free options first.
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Bing Webmaster Tools Now Shows Your AI Citation Share — A Hands-On First Look
Bing added Intents, Topics, Citation Share, and Compare to its AI Performance report — the first free tool to show your share of AI citations. We opened our own account: here’s what it looks like, and why our baseline of zero is useful.