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Data study of 20011 Claude answers over 13 months: the platforms it cites most, its citation density and how it differs from the four other AI.
Claude was measured on 20011 answers over 13 months. Its most cited platform is Trustpilot at 1.57%, and it names on average 3.5 sources per answer, which places it fourth of the five models measured.
Claude cites the smallest and most selective set of sources of the five models, and it ignores several platforms the others rely on.
A citation rate of 2% means the source was cited twice for every 100 measured answers. Rates are computed per model against the number of answers of that model, so a model with a smaller sample never distorts a column. A source cited several times inside one answer is counted once per company block, which keeps a single verbose answer from dominating a month.
The distribution is worth as much as the ranking. The top three sources hold 63% of the citations counted in this table, 1 platform sits above 1%, and Trustpilot is cited 3.1 times more often than HubSpot. A market where three sources hold most of the citations rewards depth on those three rather than presence everywhere.
Citation density on Claude moved from 4.7 to 2.1 sources per answer over the period. The platforms it cites moved too: Trustpilot is now first at 1.57%.
Claude behaves like a careful analyst: fewer sources, more weight on specialised and professional references, and near indifference to community platforms. For a business, that means generic social proof does not travel here. What travels is domain specific documentation, professional directories in your field, and content that reads as expert rather than promotional. It is the hardest model to enter and the least noisy once you are in.
Every number on this page comes from the public Sorank dataset. The underlying figures, the monthly detail and the filters are available here:
Open the source data on data.sorank.com
Data updated on 2026-08-26.
This study is free to quote, in an article, a deck or a report. Please cite the source and the measurement period, because the numbers move every month.
Sorank (2026). Claude Citation Study: What Claude Cites in 20011 Measured Answers. Sorank GEO studies, measured on 301025 AI answers collected between August 2025 and August 2026. Available at https://www.sorank.com/data/claude-citation-study
The same panel, read from another angle:
This study describes a market. Sorank measures your site: which questions mention you, which mention someone else, and what to publish to change that, tracked weekly across the same five AI.
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Trustpilot at 1.57%, ahead of HubSpot at 0.5% and Amazon at 0.49%. The full ranking is on this page, and the source data is public on data.sorank.com.
On 301025 answers from five AI, collected between August 2025 and August 2026, with every cited source extracted and normalised. The citation rate is the number of citations per 100 measured answers. The public dataset is on data.sorank.com.
Because the measured citation rate for that platform is zero on Claude over the period. It is a real result, not a gap in the data: the model simply did not cite that platform in the answers we collected.
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