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- eTrade
- Goldman Sachs
- Disney
- Cloudspace uses Solr (and Sunspot) for keyword searching on client projects
- Apple, Inc.
- Free People uses Solr for on-site product search, faceted refinements, related searches and auto-complete
- AT&T
- Nextiva
- CISCO uses Solr at the core of it's Cisco Pulse social network expert search platform.
- CNET Channel uses Solr for keyword and faceted search of its catalog (paid subscription required)
- Comcast XFINITY TV & X1/X2 Platform uses Solr to provide Alpha/T9/Voice Search, Browse & Recommendations to over 23 million subscribers across the United States.
- NASA is using Solr as the Enterprise Search component in its NEBULA cloud computing platform.
- MTV Networks uses Solr to power search on a number of its websites, including TheDailyShow.com, ColbertNation.com, and SouthParkStudios.com, and as a back-end tool on other sites such as comedycentral.com
- VuFind: an Open Source Discovery Portal for libraries. Installations have been known to hold up to 25 million records. Try the demo at http://www.vufind.org
- ClavisNG: an Open Source Integrated Library System. It use Solr both for the management system and the OPAC (known as DiscoveryNG). You can download and try the Community Edition at http://sourceforge.net/projects/clavisngce/
- Benipal Technologies uses a high performance 35 node Solr cluster in conjunction with Hadoop MapReduce, HBase and katta for faceted semi-supervised search algorithms as part of its Machine Learning and Artificial Intelligence R&D.
- OPUS 4 is an open source (GPL) publication repository software that uses Solr for faceted search and collection browsing. Unfortunately, the website is in German only. An English translated version will be available soon.
- J. Craig Venter Institute uses Solr for high-performance comparative metagenomics in it's METAREP tool.
Wiki Markup [Jeeran|http://www.jeeran.com/] uses Solr 4.0 to help users search about any place \[restuarent,cafe,...\]in the Middle East . \\
- JobHits Jobs search is the Solr powered job search engine using faceted navigation and collapsing. JobHits has 3 websites in UK, US and Canada
- Business Guide For Belgium and The Netherlands is a popular business guide and is using Solr 3.1 to perform fast geospacial searches and free-text searches.
- Job Basket job Search uses Solr to serve thousands of jobs to job seekers throughout the UK.
- Ingram Micro uses Solr for keyword and faceted search of its catalog in India, China, Hong Kong and Thailand
- Insidetrak Australian Job Search engine combining job listings and reviews. Usage of Solr 4.0 is currently being integrated to perform faceted search
- Hotelclub an Orbitz company, uses Solr to power it's geo-search queries on static pages.
- Redfin uses Solr to power near-real-time search for its in-house customer relationship management system.
- VirtualWorks uses Solr to power their enterprise search offering.
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