Algolia is described as 'helps product teams connect their users with information by providing the building blocks they need to create fast, relevant, personalized search' and is a popular app in the Development category. There are more than 25 alternatives to Algolia for a variety of platforms, including Online / Web-based, Linux, Self-Hosted solutions, Mac and Windows. The best alternative is MeiliSearch, which is both free and Open Source. Other great apps like Algolia are elasticsearch (Freemium), Apache Solr (Free, Open Source), Sphinx (search engine) (Free, Open Source) and wordpress i-search pro (Paid).
Solr is an open source enterprise search server based on Lucene search library, with XML/HTTP and JSON APIs. Its major features include powerful full-text search, hit highlighting, faceted search, dynamic clustering, database integration, and rich document handling.
Sphinx is a free 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.
Azure Search makes it easy to add powerful and sophisticated search capabilities to your website or application. Quickly and easily tune search results and construct rich, fine-tuned ranking models to tie search results to business goals.