Constant Contact is a public company, there for they share stats in their annual report http://investor.constantcontact.com/common/download/download.cfm?company

Constant Contact is a public company, there for they share stats in their annual report http://investor.constantcontact.com/common/download/download.cfm?companyid=CTCT&fileid=368991&filekey=8D782BD5-08BC-4DF8-9DA2-A5698A49E40B&filename=CTCT_09AR_4.26.10.pdf http://investor.constantcontact.com/common/download/download... Some key stats. Their churn is ~2.5% and their cost of acquiring customer is (whopping!) $370 PS: planning to write a post analyzing all such open stats. Do you know any other public Internet companies?