Alternatives to Contiki-NG

{"intro": "Contiki-NG is a free, open-source operating system for IoT devices with very limited resources. Its code footprint is around 100 kB, and memory can be configured as low as 10 kB. The IPv6 networking stack includes TCP, UDP, DNS, RPL, CoAP, LWM2M, WebSockets, IEEE 802.15.4, and TSCH. Documented security covers DTLS, secure CoAP, certificates or pre-shared keys, and EDHOC. Cooja and Renode simulation, Docker, and native Linux or macOS toolchains support development for its documented hardware platforms.\n\nReaders may switch when they need broader processor or board coverage, other wireless stacks, richer device operations, writable embedded Linux, or certified hard real-time behavior. Contiki-NG runs on Linux, macOS, Windows, and self-hosted setups and is free, but CSMA link-layer security is described as planned, while its native toolchain documentation centers on Linux and macOS. Weigh networking, security, update and management features, hardware targets, operating-system model, deployment, licensing, and price against the requirements of your device fleet.", "rows": [{"ref": "sw:apache-mynewt", "name": "Apache Mynewt", "best_for": "Embedded developers needing broad wireless and device-management features", "pricing": "Free; open source", "key_difference": "Mynewt adds BLE, Bluetooth Mesh, LoRaWAN, firmware image management, sensor frameworks, and secure over-the-air updates.", "choose_when": "Choose it for broader wireless options, remote firmware operations, or Cortex-M0–M4, MIPS, and RISC-V coverage."}, {"ref": "sw:freertos", "name": "FreeRTOS", "best_for": "Microcontroller projects spanning many architectures and toolchains", "pricing": "Free plan", "key_difference": "FreeRTOS supports more than 40 processor architectures, SMP scheduling, AWS IoT libraries, and two-year LTS security maintenance.", "choose_when": "Choose it when processor or toolchain breadth, multicore scheduling, AWS integrations, or LTS maintenance matters more than Contiki-NG's IoT protocols."}, {"ref": "sw:particle-device-os", "name": "Particle Device OS", "best_for": "Particle-device fleets needing managed connectivity and updates", "pricing": "Free; paid from $299 a month", "key_difference": "Particle Device OS targets Particle devices and combines a web platform, hybrid deployment, device quotas, data-operation allowances, and over-the-air updates.", "choose_when": "Choose it for Particle hardware, web-based management, hybrid deployment, and OTA updates, accepting paid tiers above the free allowance."}, {"ref": "sw:px5-rtos", "name": "PX5 RTOS", "best_for": "Safety-critical embedded applications needing certified hard real-time behavior", "pricing": "Paid; pricing on request; free trial", "key_difference": "PX5 RTOS offers hard real-time determinism, a 1KB flash and RAM minimum, and multiple functional-safety certifications.", "choose_when": "Choose it when certified safety levels, predictable sub-microsecond operations, or POSIX pthreads outweigh Contiki-NG's free open-source model."}, {"ref": "sw:openwrt", "name": "OpenWrt", "best_for": "Wireless-router deployments needing writable Linux customization", "pricing": "Free; open source", "key_difference": "OpenWrt is an embedded Linux system with a writable filesystem, optional package management, more than 27,000 packages, and web or SSH configuration.", "choose_when": "Choose it for router-oriented hardware, package-based customization, and Linux administration instead of Contiki-NG's low-resource IoT OS."}, {"ref": "sw:apache-nuttx", "name": "Apache NuttX", "best_for": "Embedded projects needing POSIX scale and extensive board support", "pricing": "Free plan", "key_difference": "NuttX spans 8-bit to 64-bit systems, more than 15 CPU architectures, over 300 boards, many configuration templates, and optional filesystems.", "choose_when": "Choose it when POSIX-oriented development, filesystem support, or wider architecture and board coverage is more important than Contiki-NG's protocol focus."}, {"ref": "sw:qnx-neutrino-rtos", "name": "QNX Neutrino RTOS", "best_for": "Commercial embedded systems requiring microkernel isolation and recovery", "pricing": "Paid; pricing on request; 30-day trial", "key_difference": "QNX Neutrino uses a memory-protected microkernel design with component restart, multiprocessing, distributed processing, and POSIX portability.", "choose_when": "Choose it for commercial evaluation, fault recovery without rebooting, protected components, or QNX's broader networking and processor support."}]}