Techniques are disclosed for providing secure transaction functionality embedded into host applications executing on transaction client devices, using an integration framework and user interfaces. A transaction server may be configured to receive initial transaction sender and receiver data from an integrated software component executing within a host software application on a transaction client device. After receiving the initial transaction sender and receiver data from the integrated software component, the transaction server may determine transaction sender and transaction recipient locations, and may select a particular transaction user interface based on the sender and recipient location data. Particular transaction user interface also may be determined based on specific host applications. After determining the particular transaction user interface, the interface may be transmitted to the transaction client device, for example, via a content delivery network.