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Research, comparisons and guides on how ChatGPT, Perplexity, Gemini, Claude, Grok and Google decide which brands to name and which pages to cite, with the method stated and the sources dated.
Compare the toolsHow we measure
104 notes 9 tools compared Published by the team that builds Cituna
Engines we cover
Tools compared
Latest
Research
We kept every source from 3,531 answers by ChatGPT, Perplexity, Gemini, Claude, Grok and Google's two AI engines. Perplexity cites four times as many sites as ChatGPT, roundups take two thirds of the citations, and one engine answered a software question with alternative rock.
Research
What the answer engines actually cite, measured on the engines themselves.
Every number comes with its method and the dates it was measured.
All researchWe fetched nine vendors' pricing pages without running JavaScript, the way OpenAI's, Anthropic's and Perplexity's crawlers fetch them. Four publish an entry price a crawler can read. One loads its prices with JavaScript and one publishes none.
How much seven AI engines cite Reddit, YouTube and LinkedIn for questions about AI visibility tools, from 15.8% of Google AI Mode's citations to 0.1% of ChatGPT's, with per-engine counts, shares and the questions involved.
ChatGPT cites few sources per answer, and its most-cited sites are AI visibility vendors' own domains. Our scans show which roundups, page kinds and questions make up the rest, and how ChatGPT differs from six other engines.
Claude cites about eight sources per answer, gives articles and reference pages a larger share than any other engine, and cited no Reddit threads at all. Our scans show its most-cited sites, page kinds, questions and misreads.
Comparisons
AI visibility tools side by side, from each vendor's own published facts.
All comparisonsCituna's MCP server has 31 tools, 22 that read from the $49 Starter plan and 9 that write on Pro, hosted or local. Twenty more AI visibility MCP servers by tool count, sign-in and the plan that unlocks them, read 1 to 22 October 2026.
20 min read Updated
Cituna's 3-day trial checks your top 3 prompts on seven AI engines daily, 63 answers, then $49 a month. What 20 more trials and free plans buy in answers and repeat runs, read 1 to 22 October 2026.
18 min read Updated
Ahrefs Brand Radar pricing: checks per plan, $50-$250 prompt packs, the $199 index, worked costs, and Cituna's daily tracking on seven engines.
6 min read Published
Guides
Guides
Which social sites each AI engine cites, the posts that get cited, and how to schedule and measure them, from our scans of seven AI engines.
Guides
What Search Console already shows about AI Overviews and AI Mode in 2026, the seven checks a tool's Search Console integration should pass, and which AI visibility tools publish one, checked on each vendor's own pages.
Guides
Seven criteria for choosing an AI visibility tool in 2026, from the engines your buyers use to trial and contract terms, each with what to check and a dated example from vendors' own pages, plus a scoring worksheet.
Glossary
How AI answer engines choose which brands to name and cite, how to measure your share of their answers, and what moves it.
The parts of search engine optimization that decide whether AI answers can find, read and cite a page.
How to write and structure content so generative engines can find it, understand it and quote it.
9 AI visibility tools side by side: entry price, engines covered, Search Console, API and MCP. Every figure is taken from the vendor's own page.