MPICH

MPICH
Stable release
5.0.0 / 6 February 2026 (2026-02-06)
Written inC99
Operating systemLinux, macOS, others.
StandardMessage Passing Interface
LicenseMPICH license (permissive)
Websitempich.org
Repository

MPICH, formerly known as MPICH2, is a freely available, portable implementation of MPI, a standard for message-passing for distributed-memory applications used in parallel computing. MPICH is Free and open source software with some public domain components that were developed by a US governmental organisation, and is available for most flavours of Unix-like OS (including Linux and Mac OS X).