We’ve been working on a cool new image editor in MailChimp, and so were digging through server logs to try to predict what its usage will be. While we had the hood open, we thought we’d grab (and share) some other interesting MailChimp stats:
- We have 1.2 million users in 158 countries. That’s quite a growth curve since going freemium in 2009 w/100k users.
- Those MailChimp users upload an average 472,000 images per day.
- We serve about 115 million of those images per day (using about 3.5TB of daily bandwidth)
- Currently, we run MailChimp on 117 servers. 134 total, counting all our different services and products.
- We send between 80-100 million emails per day (using 3.29TB of bandwidth per day)
- Our servers track an average 20,305,881 email opens per day.
- We track over 4 million clicks per day


