What to cost when the time comes.
Whatever you end up buying, in this category or another, the subscription line is rarely the expensive part. These are the costs that decide whether contract software pays for itself.
Count the work the license does not cover.
Migration, contract taxonomy design, role configuration, integration work, user training, ongoing administration and data export all cost real time. A cheaper license attached to a six-month implementation is not the cheaper option.
Ask any vendor what happens to your data if you leave, and how long an export takes. The answer is a good proxy for how the rest of the relationship will go.
Price the category, not the feature list.
Drafting, redlining, negotiation and e-signature are a different job from running the obligations in an agreement after it is signed. Paying less for the wrong category still produces a costly implementation and a system nobody opens.
If you are still working out which document does what, our references on MSAs and SOWs and amendments and addenda are a reasonable place to start.