Open microprocessors

SiFive, Inc. is an American fabless semiconductor company and provider of commercial RISC-V processors and silicon chips based on the RISC-V instruction set architecture (ISA). Its products include cores, SoCs, IPs, and development boards.

The OpenPOWER Foundation is a collaboration around Power ISA-based products initiated by IBM and announced as the "OpenPOWER Consortium" on August 6, 2013. IBM's focus is to open up technology surrounding their Power Architecture offerings, such as processor specifications, firmware, and software with a liberal license, and will be using a collaborative development model with their partners.

M-Labs (formerly known as the Milkymist Project) is a company which develops, manufactures and sells open hardware devices and software. It is known for the Milkymist System-On-Chip (SoC) which is a commercialized system-on-chip with free HDL source code.

MIPS (Microprocessor without Interlocked Pipelined Stages) is a family of reduced instruction set computer (RISC) instruction set architectures (ISA) developed by MIPS Computer Systems, now MIPS Technologies, based in the United States.

Quintauris is a European joint company specialized in development of RISC-V based technologies. Currently located in Germany, the company aims to support and standardize RISC-V commercially.