What each platform thinks you are about to type — search suggestions from engines, marketplaces and media catalogues.
Google's suggestion lists across five surfaces — web, YouTube, Images, local and Scholar. The same endpoint returns a different universe per surface.
TikTok search suggestions — video-culture vocabulary the search engines do not surface.
Amazon search-box suggestions across eight marketplaces — buying intent rather than information intent.
Yandex search suggestions. The index is Russian-centric; other languages return fewer or no completions.
Bing search autocomplete, with relevance scores.
IMDb title and name autocomplete — returns records with ids, years, posters and cast, not just query strings.
eBay search-box suggestions. The index is English-language.
Wikipedia article autocomplete from the OpenSearch action. Matches titles by prefix, not phrases.
Ecosia search suggestions.
Brave Search autocomplete, from an independent index.
Yahoo search autocomplete.
Steam store suggestions — returns games with app ids, prices and art, not just query strings.
Qwant search suggestions, per locale.