Epoch Systems Inc., founded in December 1986, was a hardware and software company providing Hierarchical Storage Management (HSM) file servers, and distributed storage management and data backup software.

The Epoch-1 consisted of custom 68020-based CPU board running a modified version of the BSD 4.2 Unix operating system.

[1] The server combined optical and magnetic storage and used HSM algorithms to automatically migrate files between the two types of media as required.

Epoch's second product, EpochBackup, included automatic scheduling, online backup and volume management features for Unix-based client workstations from a number of manufacturers, including DEC, IBM, Hewlett Packard, Silicon Graphics and Sun Microsystems.

In late 1990 Epoch released versions of its Renaissance storage management products for Sun, HP, and MIPS Technologies Unix workstations.