Search Servers

Algolia helps product teams connect their users with information by providing the building blocks they need to create fast, relevant, personalized search.

Meilisearch helps you shape a delightful search experience in a snap, offering features that work out-of-the-box to speed up your workflow.

Unmatched relevance. Real-time insights. Anything is possible — when the precision of search meets the intelligence of AI.

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 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.

Searchcraft is a highly performant, content-optimized search engine written in Rust. It has lower resource footprint than Elasticsearch with faster response times. It aims to be faster, easier to implement, and easier to manage than Elasticsearch, OpenSearch, Agolia and Solr...

High-performance, full-featured text search engine library written entirely in Java. It is a technology suitable for nearly any application that requires full-text search, especially cross-platform. Apache Lucene is a open source.

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.

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...

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...

SearchUnit is the modern, flexible, fully featured ASP.NET search engine component for your web applications. Free Community edition available.

Search over millions of documents, and give to your users unique, amazing and unforgettable experiences.

It is closer to Apache Lucene than to Elasticsearch or Apache Solr in the sense it is not an off-the-shelf search engine server, but rather a crate that can be used to build such a search engine.

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.

ParadeDB is a modern Elasticsearch alternative built on Postgres. Built for real-time, update-heavy workloads.

ZIR AI allows application developers to add sophisticated ML-powered text search to their applications and platforms. It provides high performance gRPC APIs for indexing and running queries, encryption in transit and rest, and an OAuth 2.0 security model.

Vespa is an engine for low-latency computation over large data sets. It stores and indexes your data such that queries, selection and processing over the data can be performed at serving time.

PromptX is an AI-powered enterprise knowledge navigator designed to eliminate information silos, deliver verifiable answers.