Redisearch implements a search engine on top of Redis, but unlike other Redis search libraries, it does not use internal data structures like sorted sets.
Cost / License
- Free
- Open Source
Platforms
- Mac
- Linux
- Online
- Self-Hosted
Qdrant is described as '(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' and is an app in the development category. There are more than 50 alternatives to Qdrant for a variety of platforms, including Linux, Self-Hosted, Web-based, Mac and SaaS apps. The best Qdrant alternative is Meilisearch. It's not free, so if you're looking for a free alternative, you could try Algolia or Elasticsearch. Other great apps like Qdrant are Golem, OpenSearch, FalkorDB and Apache Solr.
Redisearch implements a search engine on top of Redis, but unlike other Redis search libraries, it does not use internal data structures like sorted sets.
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.




Low End Box is dedicated for running websites and services on low end dedicated servers/virtual private servers, where you only need to pay a few dollars a month to get full root access.
An intelligent yet easy-to-install site search for any website. Simply start typing to get search autosuggestions and semantically enriched structured data at your fingertips.




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...
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...
Forget about being limited to inefficient rendering and content hosting only: XEL is the only Blockchain supercomputer where you can calculate whatever you want.
SearchUnit is the modern, flexible, fully featured ASP.NET search engine component for your web applications. Free Community edition available.


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.

Relevanssi Light is a simple, quick and effective search improvement that replaces the default WP search with a fulltext index search.
