Heroku Uptime

Apr 2014
Mar 2014 99.99%
Feb 2014 99.99%
Jan 2014 99.98%
Dec 2013 99.94%
Nov 2013 99.98%
Oct 2013 99.97%
Sep 2013 99.98%
Aug 2013 99.98%
Jul 2013 99.99%
Jun 2013 99.98%
May 2013 99.91%

How is our uptime calculated?

Heroku is a distributed platform spread across many different datacenters and components. During any given incident, it is rare for all applications running on the platform to be affected. For this reason, we report our uptime as an average derived from the number of affected applications.

Want to know more about how uptime is determined? Read the Dev Center article.