This is awesome if you haven’t seen it: MailChimp’s Annual Report for 2012.

Some cool data:

• 9512 commits to the app and site (that’s 26 for each day of the year!)
• 3.5 hours of planned and unplanned downtime for the year
• 1.4 million new users signed up
• 281 servers running in total from 6 data centres
• 132 employees (only, considering they get about 1100 support tickets daily)
• 29800 shirts mailed (unfortunately I never got mine :( )

Love the transparency.