Xapian is described as 'Open source probabilistic information retrieval library, released under the GNU General Public License (GPL). It 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' and is a Search Server in the development category. There are more than 25 alternatives to Xapian for a variety of platforms, including Linux, Web-based, Self-Hosted, Mac and Windows apps. The best Xapian alternative is Elasticsearch, which is both free and Open Source. Other great apps like Xapian are Algolia, Apache Solr, Pagefind and Manticore search.
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 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.
SearchUnit is the modern, flexible, fully featured ASP.NET search engine component for your web applications. Free Community edition available.
Canada
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.
India
Search over millions of documents, and give to your users unique, amazing and unforgettable experiences.
Spain
EU
SearchBlox is an out-of-the-box Enterprise Search Solution built on top of Apache Lucene/Solr. It is fast to deploy, easy to manage and available for both on-premise and cloud deployment.
Cludo is a powerful search solution to your website. It is built on top of Elasticsearch which means you do not have to do any further developing, or hire any developer concerning site search. Cludo's focus is to deliver an easy to use search engine with the greatest support...
DenmarkEU
Simplify how agents connect to enterprise data. Build high-impact AI apps with one centralized solution for agentic retrieval-augmented generation (RAG) workflows.
Enterprise search, simplified. Cloud-based enterprise search solution that search across all of your organization’s content sources — Aconex, Procore, Dropbox, Microsoft Sharepoint, Onedrive, and more.
United Kingdom
United States
ParadeDB is a modern Elasticsearch alternative built on Postgres. Built for real-time, update-heavy workloads.
United States
Elasticsearch client with query console, field-aware autocomplete, saved queries, and multi-cluster support. For ES 6.x-9.x.
France
