MicroEJ

France

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MicroEJ (legally registered as Industrial Smart Software Technology – IS2T SA) is a French software provider founded in 2004, headquartered in Nantes, France, with regional offices in the United States, Canada, Germany, Romania, India, South Korea, and Japan. MicroEJ develops standard software containers and virtual execution runtime environments tailored specifically for resource-constrained microcontrollers (MCUs) and microprocessors (MPUs).

With more than 450 million MicroEJ-powered edge and IoT devices sold worldwide, the company collaborates closely with tier-1 semiconductor manufacturers including STMicroelectronics, NXP Semiconductors, and Qualcomm. MicroEJ employs approximately 70 people globally and has invested over $55 million in R&D.

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MicroEJ provides containerized runtime architectures, virtual platforms, and developer tooling for hardware control:

MICROEJ VEE (Virtual Execution Environment): Ultra-lightweight software container and virtual processor (MEJ32) requiring as little as 28 KB flash and 1.5 KB RAM. It operates directly bare-metal or on top of any RTOS (FreeRTOS, Zephyr, QP/C, ThreadX, ucOS, PikeOS, VxWorks) and embedded Linux.
Hardware Abstraction & Managed-C: Secure execution framework supporting both C and Java, isolating application code in sandboxes while directly interfacing with hardware peripherals, board support packages, and low-level drivers.
Embedded GUI & Human-Machine Interfaces: MicroUI graphics framework and vector engines for monochrome, color, and touch displays (such as smartwatches, appliances, and industrial HMIs) on low-power Cortex-M0+/M4/M33/M7 cores.
Connectivity & Protocols: Standard abstraction layers for Bluetooth, Wi-Fi, Cellular IoT (LTE-M, NB-IoT), USB, and serial interfaces.
Desktop Simulation: Virtual device tooling enabling developers to run, test, and validate embedded software on desktop environments prior to physical target silicon availability.

MicroEJ

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