At Plivo calls are charged at Sixty-second billing for both outbound and inbound calls. All calls are billed to the next closest minute. That is a minimum billing length of 60 seconds followed by 60-second increments. For example, a 10-second call will be billed at 1 minute. A 70-second call will be billed at 2 minutes. Phone numbers are charged on monthly basis per number.
To know more about pricing, you can check out our pricing page at Plivo pricing.