Retrospect is a family of software applications that back up computers running the macOS, Microsoft Windows, Linux, and classic Mac OS operating systems. It uses the client–server backup model, which means there must be a backup server application running on one computer and small-footprint client applications running on the other computers being backed up in either a single platform or mixed platform network. The destination may be a tape drive instead of a hard disk drive or cloud drive. The company's backup server application runs on either a macOS or a Windows computer, but there are also versions of the client application that run on Linux or classic Mac OS.
The product is used for GUI-scripted backup in a heterogeneous network, primarily by small and medium-sized businesses.