A first-party citation is a citation whose source is the brand's own domain — its product page, pricing page, docs, or blog — rather than a third-party page about the brand. It is the counterpart to a third-party or earned citation, where the engine cites a review site, an independent best-of list, a comparison page, or a community thread. The distinction is about whose page got cited, not whether the brand was named.
The split matters because the two are won differently. First-party citations are earned by making your own pages the clean, extractable, authoritative source for facts about you — specs, pricing, official details — served as crawlable text. Third-party citations are earned indirectly, through corroboration and placement in the independent sources engines trust. For brand- and feature-specific questions ("how does X work", "X pricing"), engines tend to want the first-party source; for commercial-intent "best X for Y" questions, they lean on third-party roundups.
Which way an engine leans is shifting and version-specific. As of mid-to-late 2026, ChatGPT was reported to be resolving more of its citations to first-party sources — using the site: operator to target named domains — while third-party roundups still carried discovery and other engines. Treat the balance as something to measure per engine over time, not a fixed rule.