Your enterprise tracking contract is up for renewal. The platform fee is under C-suite scrutiny, your CFO wants a number, and when you go looking for a comparison you find that three of the four vendors on your shortlist publish no price at all. Here is how to build a cost model you can defend anyway, using only what each vendor is willing to put in public. That gap is structural. The number arrives at the end of a sales cycle, after discovery calls, a security review and a mutual non-disclosur