Algolia

Algolia is a hosted search service. You send it your product catalog, and it returns results as shoppers type, with typo tolerance, filters, synonyms and ranking rules you control. Developers build the search box and results pages on top of its API, and ready-made connectors exist for the main store platforms.

On top of search it offers recommendations, such as related or frequently bought together products, and AI ranking features that learn from clicks and purchases. Merchandisers can pin or bury products for a query without code.

Good on-site search matters most for stores with large catalogs, where shoppers who search tend to know what they want. The work is in the setup: clean product data, sensible synonyms and someone who reviews the searches that return nothing.