I've worked in Marketing and with Sales teams for 13 years and Closed Lost data is a treasure chest. It's the key to understanding why people don't sign up and what you need to change/improve about your product, pitch, target customer to win more deals and make more money.
I'm starting a project that will give you insight into your Closed Lost deals. It's early stages and I am looking for a handful of people to test it with.
Ideally suits a sales-led business (i.e. you have spoken to the customer on the phone at some point) in an English speaking country.
Drop me a comment if you think this could help you.
Rob