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- Eolya Consulting. Based in Paris, France. Solr/Lucene consulting, development and integration. Web crawling and document processing (www.crawl-anywhere.com). Vertical search engine and federated search. Search engine migration. Solr hosting (www.mysolrserver.com).
- Erick Erickson Solr/Lucene consulting; design, tuning and troubleshooting. Based in Oakland, California, United States https://www.linkedin.com/in/erick-erickson-129a341
- ESEMOS GmbH Search technology services and solutions for enterprises and eCommerce. Offices in Berlin, Darmstadt und Leipzig in Germany <info at esemos.de>
- Findwise is a search specialist. Custom Lucene/Solr implementations. Offices in Sweden, Denmark, Poland and Australia. (Contact us).
- Federico Feroldi <pix at yahoo.it> - Solr consulting and development, currently located in Italy
- Flax Based in Cambridge, UK. Experts in all aspects of search development using open source technology (Lucene, Solr, Xapian, Stanford NLP) Contact us
- France Labs is an Enterprise Search company, focusing on open source technologies. We provide our expertise for Lucene/Solr, Datafari and ManifoldCF - installation, configuration, support and training. Datafari is our open source enterprise search solution.
- GFU IT Schulung - Solr training and consulting in Germany and Europe.
- Jonathan Haddad Linux / Solr consulting. Implemented solr on http://www.airliners.net as well as http://www.answerbag.com
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