Azure Active Directory B2C (Azure AD B2C) is a cloud-based identity and access management service that provides robust authentication and identity management for customer-facing applications. Azure AD B2C pricing is based on a consumption model, and it offers different pricing tiers and options to meet the needs of various businesses and customer volumes. Below are some key points regarding Azure AD B2C pricing:

1. Free Tier: Azure AD B2C includes a free tier that allows you to get started with the service at no cost. It provides basic authentication and identity management capabilities for a limited number of users and a limited number of identity providers.

2. Pricing Tiers: Azure AD B2C offers two primary pricing tiers:

   • Pay-as-you-go (PAYG): With this option, you pay only for the authentication and identity operations performed by your users. Pricing is based on the number of monthly authentication transactions and the number of identity providers used.
   • Per-Month Capacity (PMC): This tier provides predictable pricing with a fixed monthly cost, regardless of the number of authentication transactions or identity providers used. It is suitable for businesses that want to have cost predictability.

3. Authentication Transactions: Azure AD B2C charges based on the number of authentication transactions. An authentication transaction occurs each time a user authenticates or signs in to your application. Pricing is typically tiered, with different pricing levels based on the number of transactions per month.

4. Identity Providers: The number of identity providers used in your Azure AD B2C policies can affect pricing. You may incur additional costs if you integrate with multiple identity providers.

5. Custom Policies: Azure AD B2C allows you to create custom identity experience policies to match the branding and user experience of your application. While custom policies offer flexibility, they can also affect pricing due to the complexity of the policies.

6. Data Storage: Data storage costs may apply if you store user data or logs in Azure AD B2C. It’s important to monitor and manage your data storage usage to control costs.

7. Cost Estimation: Azure provides a pricing calculator that allows you to estimate your Azure AD B2C costs based on your expected usage, including the number of users, transactions, and identity providers. This helps you plan and budget for your authentication and identity management needs.

8. Support Plans: Azure AD B2C offers different support plans, including free support and paid support plans with varying levels of service and response times. Premium support plans are available for businesses with more extensive support requirements.