OpenSearchServer is described as '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' and is a Search Server in the development category. There are more than 25 alternatives to OpenSearchServer for a variety of platforms, including Web-based, Self-Hosted, Linux, Mac and Windows apps. The best OpenSearchServer alternative is Algolia. It's not free, so if you're looking for a free alternative, you could try Algolia or Elasticsearch. Other great apps like OpenSearchServer are Apache Solr, Manticore search, Searchspring and Pagefind.
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...
Ambar is a smart documents archive with automated crawling, OCR, deduplication and ultra-fast full-text search. Imagine having billion of files in different formats like xls, doc, txt, pdf, ppt, etc..., in any encoding.
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.
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.
Search over millions of documents, and give to your users unique, amazing and unforgettable experiences.
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...
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.
Simplify how agents connect to enterprise data. Build high-impact AI apps with one centralized solution for agentic retrieval-augmented generation (RAG) workflows.
TinySearch is a lightweight, fast, full-text search engine. It is designed for static websites.
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.
ParadeDB is a modern Elasticsearch alternative built on Postgres. Built for real-time, update-heavy workloads.
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