Solr is a standalone enterprise search server with a REST-like API. You put documents in it (called "indexing") via JSON, XML, CSV or binary over HTTP. You query it via HTTP GET and receive JSON, XML, CSV or binary results.
Advanced Full-Text Search Capabilities
Powered by Lucene™, Solr enables powerful matching capabilities including phrases, wildcards, joins, grouping and much more across any data type
Optimized for High Volume Traffic
Solr is proven at extremely large scales the world over
Standards Based Open Interfaces - XML, JSON and HTTP
Solr uses the tools you use to make application building a snap
Comprehensive Administration Interfaces
Solr ships with a built-in, responsive administrative user interface to make it easy to control your Solr instances
Need more insight into your instances? Solr publishes loads of metric data via JMX
Highly Scalable and Fault Tolerant
Built on the battle-tested Apache Zookeeper, Solr makes it easy to scale up and down. Solr bakes in replication, distribution, rebalancing and fault tolerance out of the box.
Flexible and Adaptable with easy configuration
Solr's is designed to adapt to your needs all while simplifying configuration
Near Real-Time Indexing
Want to see your updates now? Solr takes advantage of Lucene's Near Real-Time Indexing capabilities to make sure you see your content when you want to see it
Extensible Plugin Architecture
Solr publishes many well-defined extension points that make it easy to plugin both index and query time plugins. Of course, since it is Apache-licensed open source, you can change any code you want!