Claim: Arduino boards and compatible systems are produced by multiple companies, including Analog Devices, Howtronics, Microint USA, Cypress and many others.
Evidence: Many versions of the official Arduino hardware have been commercially produced to date: Howtronics Analog Devices Microint USA (Cortex™-M3 ) PIC16F886-I/SP NXP LPC4330 Cypress Cypress PSoC4 CY8C4245AXI-483 Parallax Parallax Propeller Wilderness Labs Cortex-M4 (STM32F4)
(ARM7) MyFreescaleWebPage Freescale S08DZ60 MyFreescaleWebPage Freescale MCF51AC256 MyFreescaleWebPage Freescale MCF51JM128 Parallax PIC or Parallax SX PICcircuit.com PIC18F2550 or
PIC18F2553 Analog Devices (Cortex M3)