At SEscout.com we used notifo for user rank change notifications until they announced they would be ending the service. We have been testing boxcar for a future replacement and are pretty happy with it. Feels like a solid product.

Boxcar is great. It was very cool to be able to curl the Boxcar API and have a notification on my phone in a fraction of a second.

My startup uses Boxcar for deploy notifications, new paying customers, etc.

thanks for the mention josh. it's pretty cool that you know we exist.

-jdg