apache/nuttx
Apache NuttX is a mature, real-time embedded operating system (RTOS) observed · 2026-08-28
Health v2 · maintenance only
77/100
- Activity 99
- Release rhythm 35
- Longevity 100
Flags: no_releases
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 2454
- days_rel: n/a
- days_push: 7
- n_releases_24m: 0
Adoption not part of the score
4010 stars · 1680 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
Apache NuttX is a mature, open-source real-time operating system (RTOS) for embedded systems with an emphasis on POSIX/ANSI standards compliance and a small footprint. It scales from 8-bit to 64-bit microcontrollers, supporting 15+ CPU architectures, 300+ boards, and 1500+ configuration templates.
Use cases
- run a POSIX-compliant RTOS on a microcontroller
- build firmware for ARM or RISC-V embedded boards
- develop real-time IoT applications with a small footprint
- port Unix-style code to deeply embedded hardware
- evaluate open-source RTOS alternatives to VxWorks or FreeRTOS
- prototype embedded software using the NuttX simulator
When to choose
- you need a standards-compliant, POSIX-like RTOS for microcontrollers
- your target hardware ranges from 8-bit to 64-bit MCUs
- you want an Apache-2.0 licensed, community-governed embedded OS
- you need broad board and architecture support with prebuilt configurations
When to avoid
- you need a full general-purpose OS with rich desktop features
- your project requires hard guarantees on input validation and security hardening out of the box
- you prefer an RTOS with a large commercial vendor ecosystem and support contracts
Facets
application · maturity stable
embedded concurrency file-system networking security embedded-systems operating-systems iot embedded iot cpp c rtos posix-compliant microcontroller real-time-operating-system firmware apache-software-foundation real-time arm
6 sources
- readme: https://github.com/apache/nuttx · fetched 2026-08-28 · f3d90f2c441b
- homepage: https://nuttx.apache.org/ · fetched 2026-08-29 · 4bbb83dab32c
- site_page: https://nuttx.apache.org/docs/latest · fetched 2026-08-29 · ba4886f85d95
- site_page: https://nuttx.apache.org/docs/latest/security.html · fetched 2026-08-29 · f283ed6ffe79
- site_page: https://nuttx.apache.org/download · fetched 2026-08-29 · 20701ad2c028
- site_page: https://nuttx.apache.org/articles · fetched 2026-08-29 · e15aedd076ae
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| apache/nuttx | main | 77 |
For agents
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem