Trustframework host system 104 may comprise one or more server computers, which may include one or more distributed or “cloud-based” servers, one or more non-cloud-based servers, and/or one or more local servers (e.g., an application service provider's servers), in various embodiments. Trustframework host system 104 is configured to provide composable user journeys according to the IEF for a user of user device 102 that attempts to access an application of application service provider 116, e.g., via a user interface (UI) 112 over network 110. As illustrated, trustframework host system 104 includes policies 106 and an identity experience engine (“engine”) 108. Trustframework host system 104 may be configured to provide composable user journeys according to the IEF via engine 108, in embodiments. For example, engine 108, described in further detail below, may be configured to execute a user authentication process that is defined by an identity policy of policies 106 that is called by an application to which a user seeks authentication and access.