Setup and onboarding fees
$500–$50,000+ depending on whether you're a solo operator on a self-serve platform or an enterprise needing discovery workshops, prompt engineering, and staff training.
Integration costs
Custom development to connect your CRM, booking system, or internal database can add $1,000–$5,000 on the low end, and considerably more if your systems are legacy or poorly documented.
Overage penalties
Go over your included minutes and some providers charge 2–3x the base rate for the overage.
Compliance surcharges
If you're in healthcare, insurance, or finance, HIPAA or PCI-DSS-compliant infrastructure often costs extra, sometimes thousands more per month.
Your own engineering time
This is the one people forget to count. If you're piecing together a DIY stack on a "cheap" per-minute platform, someone on your team is spending real hours building and babysitting it. At $50–$150/hour in engineering time, a "budget" platform can quietly end up costing more than a fully managed build.
The rule of thumb
Whatever the vendor quotes you, add 20–35% before you take it to your budget owner. That's roughly what hidden fees add on average once everything is accounted for.
