diff --git a/README.md b/README.md
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@@ -1241,6 +1241,7 @@ See also _[Monitoring](#monitoring)_
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 - [Ambar](https://ambar.cloud) - Document Search Engine (OCR, Store & Search). ([Demo](https://app.ambar.cloud/), [Source Code](https://github.com/RD17/ambar)) `MIT` `Nodejs/Python`
+- [Apache Solr](https://lucene.apache.org/solr/) - Solr is the popular, blazing-fast, open source enterprise search platform built on Apache Lucene. ([Source Code](https://lucene.apache.org/solr/downloads.html)) `Apache-2.0` `Java` 
 - [Gigablast](http://www.gigablast.com/) - open source search engine. ([Source Code](https://github.com/gigablast/open-source-search-engine)) `Apache-2.0` `C++`
 - [Searx](https://asciimoo.github.io/searx/) - Privacy-respecting, hackable metasearch engine. ([Demo](https://searx.me/), [Source Code](https://github.com/asciimoo/searx)) `AGPL-3.0` `Python`
 - [Yacy](http://yacy.net/en/index.html) - Peer based, decentralized search engine server. ([Demo](http://search.yacy.net/), [Source Code](https://github.com/yacy/yacy_search_server)) `GPL-2.0` `Java`