<i>we need to build</i><p>Why not buy?<p>If the company can buy, why isn't it?<p>If the company can't buy, it is under-capitalized and that's a sizable problem because search is a commodity.<p>Anyway, the best search experience is not needing to search for the same reason that I don't enjoy searching for my car keys when I am trying to commute to work.<p>Good luck.
Building it yourself is the better option nowadays.<p>Start with open-source Meilisearch, and don't look back.<p>The "buy" options people talk about are tired-old snake oil, and you'll end up with buyer's remorse.