Ask HN: Who's using Clojure in production?

Major startups I know that are using Clojure are CircleCi and Prismatic.

I also know Walmart Labs has a team that does Clojure.

OpenSensors.io is a clojure & clojurescript shop

SoundCloud has Clojure in production

The backend of Leancloud.cn is built with Clojure.

paper.li is almost fully clojure. exoscale.ch runs critical infrastructure on clojure.

walmart labs has been mentioned, the climate corporation (recently bought by monsanto) is another well-known one.

Here in Switzerland I can count 4 others smaller companies and at least a very big telco.

If you start counting every company relying on riemann for production monitoring that adds quite a few :-)

Here's a few:

- Walmart Labs - http://jobs.walmart.com/san-bruno/ecommerce/mobile-instore-s...

- Staples - http://careers.staples.com/sanmateo/

- Climate Corp (now owned by Monsanto) - https://github.com/TheClimateCorporation

- RoomKey http://www.colinsteele.org/post/27929539434/60-000-growth-in...

- Puppet Labs - http://puppetlabs.com/blog/new-era-application-services-pupp...

- Soundcloud - http://blog.josephwilk.net/clojure/building-clojure-services...

- Netflix - https://speakerdeck.com/daveray/clojure-at-netflix

- eBay - https://www.linkedin.com/jobs2/view/26386571

- Two Sigma - https://www.youtube.com/watch?v=YHctJMUG8bI

- Consumer Reports - http://www.meetup.com/denofclojure/messages/boards/thread/47...

- LivingSocial - https://www.linkedin.com/jobs2/view/19995533

- Factual

- Thoughtworks - http://thoughtworks.github.io/p2/issue09/two-months-early/

- Daily Mail - http://www.pitheringabout.com/?p=1018

- MixRadio - http://dev.mixrad.io/blog/2014/10/19/Clojure-libraries/

- Prismatic - http://blog.getprismatic.com/blog/2013/1/14/bringing-functio...

- Pivotal Labs - http://www.pivotaltracker.com/community/tracker-blog/generat...

- Beanstalk - http://blog.beanstalkapp.com/post/23998022427/beanstalk-cloj...

- uSwitch

- CFPB (Credit Financial Protection Bureau) - https://cfpb.github.io/articles/seeking-clojure-developers-t...

- Braintree Payments - https://speakerdeck.com/davidpick/building-a-data-pipeline-w...

- Outpace

- ViaSat / Lonocloud

- 8th Light

- Main Street Genome

- FarmLogs

- nilenso

- BrickAlloy

- Mastodon C

- Nubank

- Democracy Works

- World Singles

- Sonian

- Vital Reactor - https://www.youtube.com/watch?v=yroKdhAt8as

- DiligenceE...

we are using it at event fabric and we love it: http://eventfabric.com/

some libs we use:

* immutant http://immutant.org/

* prismatic's plumbing https://github.com/Prismatic/plumbing

* korma http://www.sqlkorma.com/

* friend https://github.com/cemerick/friend

* metrics clojure: https://github.com/sjl/metrics-clojure/

At akvo.org we are using Clojure in production and hopefully soon also Clojurescript.

We are using Clojure on top of existing Java functionality, and we're moving our Ember based Dashboard over to Clojurescript/Om.

Outpace is a Clojure/CLJS shop - http://www.outpace.com/

Teradata is using it for Loom - http://www.teradata.com/Teradata-Loom

At Tide Pool Capital we've been using Clojure for a trading platform on peer-to-peer consumer credit. The system has been in production since the summer of last year. Clojure has been a pleasure to use and the ecosystem has supported all of our needs: Postgresql, redis, rest, soap, 0mq, AWS, client/server, producer-consumer channels, concurrency, etc. Our server is nginx with Pedestal.

We're using Clojure at the University Health Network (http://www.uhn.ca/). Our team primarily develops mobile and web applications for clinical use. We started using it about 4 years ago, and now have a number of applications and services written in it.

We're primarily a Java shop and Clojure was appealing because it allowed us to leverage the existing ecosystem, tools, and libraries that we were already using. With Clojure, we were able to develop applications much more rapidly than with Java and we found that the applications were easier to maintain. The latter primarily comes from pervasive immutability and vast overall reduction in code.

We're currently exploring ClojureScript for the client side and already deployed a small app in production using Reagent (http://reagent-project.github.io/). It's worked extremely well for our needs to far.

I was also able to release a number of libraries I developed for work as open source:

- clj-pdf PDF generation - https://github.com/yogthos/clj-pdf

- instant-pdf service - https://github.com/yogthos/instant-pdf

- Selmer templating library - https://github.com/yogthos/Selmer

- markdown-clj - https://github.com/yogthos/markdown-clj

- reagent-forms - data binding library for Reagent - https://github.com/reagent-project/reagent-forms

We use Clojure in production at Shareablee with Storm.

http://www.shareablee.com/

My new startup Clubhouse (http://www.clubhousehq.com) uses Clojure for the entire backend. Also, the data team at my last company Intent Media (http://www.intentmedia.com) used Clojure for most of their data analysis.

ThreatGRID, now part of Cisco, uses clojure in our malware analysis and threat intelligence platform. It's a core part of our analysis engine, which examines all the things malware does and how to detect it on the rest of your systems. We've built a 1980s "expert system" startup using core.logic.

It's also the core of our API service, and the UI built on top of that. We use clojurescript extensively in the UI, and have been moving large parts of it to Om.

It is a key technology for us, letting us build better analysis tools, faster and more performant than other languages. We have clojure code in production both in our SaaS offering, and shipped to many large finance, government, and corporate customers around the world.

Interesting and relevant comment from cbrozefsky, which is marked dead.

ThreatGRID, now part of Cisco, uses clojure in our malware analysis and threat intelligence platform. It's a core part of our analysis engine, which examines all the things malware does and how to detect it on the rest of your systems. We've built a 1980s "expert system" startup using core.logic.

It's also the core of our API service, and the UI built on top of that. We use clojurescript extensively in the UI, and have been moving large parts of it to Om.

It is a key technology for us, letting us build better analysis tools, faster and more performant than other languages. We have clojure code in production both in our SaaS offering, and shipped to many large finance, government, and corporate customers around the world.

We use Clojure in production to run Database Labs, https://www.databaselabs.io . The account management and billing web app is Clojure + Postgres, proxied through nginx. I couldn't be happier with Clojure for webapps.

It’s Artem from Wildbit (http://wildbit.com). We’ve been using Clojure in production since 2012.

http://dmarc.postmarkapp.com/ — free DMARC weekly digests and API. Clojure back-end + Javascript front-end.

http://dploy.io — a Ruby on Rails app featuring internal Clojure RPC built on top of clj-jgit and subversion-clj libraries (both currently supported by Wildbit).

The usage of Clojure at Beanstalk (http://beanstalkapp.com) has also been growing since the blog post already mentioned in this thread. It now powers our indexing infrastructure, provides internal RPC and runs sophisticated reports in the background.

We're using Clojure in production at Datacraft (http://www.datacraft.sg).

Main usage is on the server side: for web applications, APIs and data analytics back ends.

Silverline Mobile (http://silverline.mobi/) uses Clojure in production - managing data from sensors installed in the homes of senior citizens in Singapore.

stylefruits uses Clojure almost exclusively these days. https://www.youtube.com/watch?v=Hv4slaRydRM

I work for ThoughtWorks and we have a number of client's who use Clojure in production. This is one example from Australia - http://www.thoughtworks.com/clients/ioof

We use Clojure, ClojureScript and Datomic at https://www.cognician.com.

I wrote recently about our newer generation efforts here: http://www.stuttaford.me/2014/09/24/app-and-dev-services-wit...

I have worked in Yousee IT Innovation labs through 3.5 years where we had both clojure and datomic running in production.. The main part of the applications was integration type components coupled via hypermedia REST APIs. One of the most flexible application layout's I ever been working on. Lein and GO deployment..: http://yousee.dk

We (Xcoo, Inc.) are using Clojure since 2013.

https://xcoo.jp

Our products using Clojure are :

- "Chrovis", which is a bio-informatics web application that analyzes and visualizes huge genome data sets https://chrov.is

- "Hacker News Hack", which is a web application that shows HN with categories and popularity http://newshack.io