BladeSystem is a line of blade server machines from Hewlett Packard Enterprise (Hewlett-Packard before 2015) that was introduced in October 2004.

The BladeSystem forms part of the HP Converged Systems, which use a common converged infrastructure architecture for server, storage, and networking products. Designed for enterprise installations of 100 to more than 1,000 Virtual machines, the HP ConvergedSystem 700 is configured with BladeSystem servers. When managing a software-defined data center, a System administrator can perform automated lifecycle management for BladeSystems using HP OneView for converged infrastructure management.

The BladeSystem allows users to build a high density system, up to 128 servers in each rack.