If you have started researching a proposal tool for your team/company, I must appreciate your intent o break the status quo and leave behind the age-old way of working. You are on the right path and improve your sales process and in turn, help your business grow.
Your research must begin by asking few questions and try to find honest answers to those.
What is the biggest pain in your proposal process? spending week to create a proposal, days to get it internally approved, no conclusion/closure to 80% of the outstanding proposals
What do you want to achieve using a proposal tool? e.g. cut down turn around time to say 3 hours (including internal approval), smart follow-ups instead of blind ones to close 15% more deals.
Read more about 9 Critical Features to Look for in a Proposal Software