Telescope Partners Head of Marketing | Formerly Nexmo, Dialpad, Aspire, Brandfolder • 8y
If you have the budget, I'd recommend just going with someone like Forrester to do it. I personally think when companies self-publish TEI reports prospects just ignore them because there is not much validity. That being said, expect to pay around $80-100k.
Can also work with companies like Nucleus Research to build an ROI calculator. Those guys are great, I'd highly recommend them. They'll also spend time training your sales team on how to use it.