Algolia is the leader in globally scalable, secure, digital search and discovery experiences that are ultrafast and reliable.
Integrate powerful search functionality into your applications, without ever having to set up or manage servers.
Vanilla JS Search, filter and sort for your HTML
Lunr.js is a small, full-text search library for use in the browse.
Next generation search API
Pagefind is a fully static search library that aims to perform well on large sites, while using as little of your users’ bandwidth as possible, and without hosting any infrastructure.
Apache Solr is the time and battle-tested solution to getting a scalable, production-grade search engine up on your application. And because it’s open source it’s both affordable and customizable.