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...
Azure AI Search Alternatives
Azure AI Search is described as 'Simplify how agents connect to enterprise data. Build high-impact AI apps with one centralized solution for agentic retrieval-augmented generation (RAG) workflows' and is a Search Server in the development category. There are more than 25 alternatives to Azure AI Search for a variety of platforms, including Web-based, Linux, Self-Hosted, Mac and Windows apps. The best Azure AI Search 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 Azure AI Search are Apache Solr, Manticore search, Searchspring and Chroma DB.
Alternatives list
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.


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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.
Cost / License
- Paid
- Proprietary
Application type
Platforms
- Software as a Service (SaaS)


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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.
Cost / License
- Freemium
- Open Source
Application types
Platforms
- Self-Hosted
- GitHub Pages

Measured Search provides a fully-managed personalized search & discovery service offering feature packed textual & relevance based search, contextualized recommendations combined with search & interaction analytics that enable you to increase conversions...
Cost / License
- Paid
- Proprietary
Platforms
- Linux
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.
Cost / License
- Paid
- Proprietary
Application types
Platforms
- Mac
- Windows
- Linux
Medullar is the fastest, most secure way to discover your data across everyday platforms in real-time, wherever it is, with one universal search tool.
Cost / License
- Freemium
- Proprietary
Platforms
- Online

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...


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Appbase.io provides a supercharged Elasticsearch experience with a #nocode relevance control plane (or JS UI components or a declarative REST API) and out-of-the-box search/click analytics and insights.
Cost / License
- Paid
- Open Source
Platforms
- Self-Hosted
- elasticsearch
- Software as a Service (SaaS)


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Azure search uses a single index to cater to all the web users. Hence webmaster does not control the ranking due to span issue. Since Expertrec has one index per website, webmasters have full control on their site ranking.