At Apache there is a user story page where end users can add them to the list that they are using Camel
http://camel.apache.org/user-stories.html
However most people do not do that. Checking the mailing list for emails and googling for blogs etc often reveal well known companies.
At FuseSource (
http://fusesource.com) we have many big enterprise customers which most of them use Camel in some way.
We do have some which uses AMQ only. Or are using SMX 3.x and JBI only.
If you see some of the case stories from FuseSource
http://fusesource.com/resources/collateral/
You will see some big companies. And if you get in touch with FuseSource (
http://fusesource.com/contact)
they will be able to get more references for big customers.
Also from this press release you can read some info about big customers of FuseSource
(
http://fusesource.com/press-releases/fusesource-102510/)
Some customers do not want to do use cases and white papers. And therefore we cannot public say they are using Camel.
In Denmark the capital region has selected Camel as their choice as integration platform in their health care infrastructure.
It replaces a big vendor proprietary ESB platform.