Heroku Uptime

Feb 2016
Jan 2016 99.993%
Dec 2015 99.999%
Nov 2015 99.986%
Oct 2015 99.995%
Sep 2015 99.763%
Aug 2015 99.992%
Jul 2015 99.997%
Jun 2015 99.999%
May 2015 99.999%
Apr 2015 99.997%
Mar 2015 99.992%

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.