Voice Prover Pricing Prices for Voice Prover are available on request. Voice Prover 4.0 incorporating E1 and T1 now available. Click here to see details of the support and license upgrade contract we offer. We can also quote for writing IVR test scripts and customizing the IVR alert mechanism for IVR monitoring. If you have an IVR volume testing requirement, then contact us for more information on Voice Prover.