How to: Who is using elasticsearch?
[Yelp](http://engineeringblog.yelp.com/2015/10/how-we-use-deep-learning-to-classify-business-photos-at-yelp.html),
[IFTTT](https://medium.com/engineering-at-ifttt/data-infrastructure-at-ifttt-35414841f9b5),
[StackExchange](http://stackexchange.com/performance),
[Raygun](https://raygun.io/blog/2014/02/search-improvements-at-raygun/),
[Mozilla](https://www.youtube.com/watch?v=lWKEphKIG8U),
[Spotify](https://labs.spotify.com/2015/11/17/monitoring-at-spotify-introducing-heroic/),
[CERN](https://medium.com/@ghoranyi/needle-in-a-haystack-873c97a99983),
[NASA](https://www.elastic.co/elasticon/2015/sf/unlocking-interplanetary-datasets-with-real-time-search)
[Zalando](https://www.elastic.co/fr/videos/creating-the-fashion-experience-of-the-future-with-elasticsearch-at-zalando)