Sphinx (search engine) is described as 'Sphinx is a software search engine designed with indexing database content in mind. It currently supports MySQL, PostgreSQL, and ODBC-compliant databases as data sources natively. Other data sources can be indexed via pipe in a custom XML format' and is a Search Server in the development category. There are more than 25 alternatives to Sphinx (search engine) for a variety of platforms, including Web-based, Linux, Self-Hosted, Mac and Windows apps. The best Sphinx (search engine) alternative is Openverse, which is both free and Open Source. Other great apps like Sphinx (search engine) are Presearch, Algolia, Meilisearch and Elasticsearch.
Elasticlunr.js, lightweight full-text search engine in Javascript for browser search and offline search. Elasticlunr.js is developed based on Lunr.js, but more flexible than lunr.js. Elasticlunr.js provides Query-Time boosting and field search.
i-Search Pro changes the way of WordPress Search. It’s full WooCommerce compatible. Provide Live search results in milliseconds. Include almost everything in your search results.
Your new search engine. No logging. No tracking. Transparent algorithms. Hosted in Europe. Users like you help shape the results.
Xapian is an open source probabilistic information retrieval library, released under the GNU General Public License (GPL). It is a full text search engine library for programmers. It is written in C++, with bindings to allow use from Perl, Python, PHP, Java, Tcl, C#, Ruby, and...
OpenSearchServer is an open source application server allowing development of index-based applications like search engines. Main features of OpenSearchServer are : An integrated crawler for databases, web pages and rich documents; a user friendly GUI allowing development of most...
The goal of ItemsAPI is creating search application without spending time for backend. You just provide json data and your backend is ready to go.
The open source (GPL v3) project strus provides a collection of programs and libraries (language C++) for building a competitive scalable full-text search engine. The search index is distributable and user rights can be implemented.
Qdrant (read: quadrant) is a vector similarity search engine and vector database. It provides a production-ready service with a convenient API to store, search, and manage points—vectors with an additional payload Qdrant is tailored to extended filtering support.
Expertrec custom search started as a replacement for google site search. It adds super-fast search autocomplete, spell correct, search listing pages to your website.
SearchUnit is the modern, flexible, fully featured ASP.NET search engine component for your web applications. Free Community edition available.
Free site search engine. Add a site search engine to your website today, for free, in less than ten minutes. Choose from Free and Pro site search engines.
Search over millions of documents, and give to your users unique, amazing and unforgettable experiences.
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Sphinx being a library, there is a whole lot of learning curve. Expertrec being SaaS, can get you started right away.