Here, are different pricing model of Microsoft Azure:
BYOL Model: It brings your license model. It is just right to access model. You can obtain it outside of the Azure Marketplace. This model is not charged any fees.
Free Software Trial: It is a full-featured version which is promotionally free for a limited period of time. However, for excessive use, you need to pay fees.
Usage-based: This is a widely used model of Microsoft Azure. Here, user are changed for only that service which is used by them.
Monthly fee: Here, you need to pay a fixed monthly payment for a subscription.