Authentication as a service

In accordance with at least some aspects of the present disclosure, an illustrative method for authenticating a user is disclosed. A plurality of biometric modalities are displayed for authenticating the user. A selection of one or more of the biometric authentication modalities may be received. User authentication data may be received for each of the one or more selected authentication modalities. The user authentication data may be compared with previously-determined biometric data. An authentication score may be determined based on the comparison of the user authentication data with the previously-determined biometric data. A determination may be made whether to authenticate the user based on the authentication score.