WordPress Theme Search - What WordPress Theme Is That?
Algolia - Algolia's Search API makes it easy to deliver a great search experience in your apps & websites. Algolia Search provides hosted full-text, numerical, faceted and geolocalized search.
Blocksy - A lightningfast, innovative and supercharged WordPress theme
Expertrec - Adds super fast search autocomplete, spell correct and search listing pages to your site search.
LyrWP - WordPress themes / plugins / services curated.
Typesense - Typo tolerant, delightfully simple, open source search 🔍