# zephyrproject-rtos/zephyr

Primary Git Repository for the Zephyr Project. Zephyr is a new generation, scalable, optimized, secure RTOS for multiple hardware architectures.

Repository: https://github.com/zephyrproject-rtos/zephyr
Canonical: https://ross.abutalabs.com/products/zephyr
Homepage: https://docs.zephyrproject.org
Language: C
License: Apache-2.0
License Family: permissive
Topics: rtos, iot, embedded, real-time, mcu, microcontroller, zephyr, zephyr-rtos, zephyros, bluetooth, bluetooth-le, embedded-c
Last push: 2026-08-26T23:05:21+00:00

## Health v2 (maintenance only)
Score: 94/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 84, longevity 100
- inputs: {"age_days": 3751, "days_push": 7, "days_rel": 26, "gap_med": 45, "n_releases_24m": 12}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 16316, forks 9847 (observed 2026-08-28T04:11:15.085700+00:00)

## What it is
Zephyr is a scalable, secure, real-time operating system (RTOS) designed for resource-constrained embedded devices across multiple hardware architectures. It provides a small-footprint kernel supporting ARM, x86, RISC-V, ARC, Xtensa, and other architectures for IoT and embedded applications.

## Use cases
- build firmware for IoT sensors and wearables
- develop real-time applications on microcontrollers
- create Bluetooth Low Energy devices
- run an RTOS on RISC-V or ARM Cortex-M boards
- build secure connected embedded products
- prototype embedded systems across multiple architectures

## When to choose
- you need a small-footprint RTOS for resource-constrained hardware
- you want broad multi-architecture support (ARM, RISC-V, x86, Xtensa, etc.)
- you need built-in Bluetooth/Bluetooth LE and networking stacks
- security is a priority for your embedded product
- you want a permissively licensed (Apache-2.0) OS with active community support

## When to avoid
- you need a full-featured general-purpose OS like Linux for application-rich devices
- your target hardware is not among the supported architectures or boards
- you prefer a proprietary or commercially supported RTOS with vendor guarantees
- you are working on non-embedded systems such as desktop or server software

## Facets
- artifact type: library
- maturity: stable
- function: embedded, iot, security, networking
- domain: embedded-systems, iot, operating-systems
- platform: embedded, iot, c
- tags: rtos, real-time-operating-system, microcontroller, kernel, zephyr, resource-constrained, multi-architecture, bluetooth, arm, risc-v, x86

## Member repositories
- zephyrproject-rtos/zephyr (main) score 94

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:15.085700+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:05:09.103032+00:00, confidence not recorded.
  - readme: https://github.com/zephyrproject-rtos/zephyr (fetched 2026-08-28T04:11:15.085700+00:00, sha bf16d21959f5)
- Data as of 2026-08-30T08:39:29.467469+00:00.