No. 14 of 28 ·Embedded Systems Toolchains

Zephyr SDK

Windows · Mac · Linux

Freedom report

Three barsScore 6.5

Zephyr SDK is ranked #14 of 28 in embedded systems toolchains on Freedom251. It runs on Linux, macOS, Windows. There is a free plan.

Zephyr SDK plans and pricing

Zephyr SDK Free Free to use; Apache 2.0 licensed; GNU, LLVM, or minimal bundle variants docs.zephyrproject.org · 30 Sept 2026

Free plan: Yes
Debugger included: Yes
SDK components: compiler, assembler, linker, GDB, QEMU, OpenOCD, BOSSA, Xilinx QEMU, Picolibc
Target architectures: ARC, ARM, MicroBlaze, MIPS, OpenRISC 1000, RISC-V, RX, SPARC, x86, Xtensa
Host platforms: Linux, macOS (AArch64), Windows (x86-64)
Build systems: CMake, west, Ninja
Debug interfaces: QEMU GDB server, OpenOCD, GDB
License model: open-source

Purpose: Zephyr SDK provides GNU and LLVM toolchains for Zephyr-supported architectures, plus host tools including custom QEMU and OpenOCD.
Operating systems: SDK bundles are available for Linux, macOS, and Windows.
Bundle options: The SDK is distributed in GNU, LLVM, and minimal bundle variants, each including host tools.
Emulation and debugging: The included custom QEMU and OpenOCD tools are used to emulate, flash, and debug Zephyr applications.
Installation: The SDK can be installed from the Zephyr repository with the command `west sdk install`.
Compatibility: The SDK page describes its referenced version as the recommended version for the corresponding Zephyr version and links to a compatibility matrix.
Security: Zephyr documents PSA Crypto with Mbed TLS and describes a monolithic kernel-and-application binary design.
Security limitation: The security overview says vendor-specific cryptographic hardware and software APIs, including TPM and TEE support, are planned.
License: The Zephyr Project says its software is available under the Apache 2.0 open source license and free for commercial and non-commercial solutions.
Support: Community support is provided through mailing lists and Discord.
Intended users: The project describes Zephyr as an RTOS for resource-constrained devices, including connected sensors, LED wearables, modems, and small wireless gateways.
Price from: Free

Claim it for free: prove the domain, then correct facts, plans and screenshots. An editor reviews every change.