Miles Kehoe at Enterprise Search – A paradigm shift in enterprise search:
“Solr is the enterprise search market now. […] What's interesting is the number of commercial products based on Solr and it's underlying platform, Lucene.
Years ago, commercial search software was the 'safe choice'. Now I think things have changed: open source search is the safe choice for companies where search is mission.”
I fully agree. We bet on Solr’s success years ago (see the 2009 blog post) and it was absolutely the right choice.
See also the article from Business Insider, who moved from Google Search Appliance (GSA) to Solr.