# Zephyr RTOS alternatives

The highest-scoring alternative to Zephyr RTOS in Embedded IOT Dev is **AWS IoT Core** (71/100), against Zephyr RTOS's 53/100. Ranked on independent signals, not user reviews. No vendor pays for placement.

| # | Alternative | Score | Confidence | Compare |
|--:|---|--:|---|---|
| 1 | [AWS IoT Core](https://www.vioscale.ai/software/aws-iot-core) | 71 | 34% (low) | [Zephyr RTOS vs AWS IoT Core](https://www.vioscale.ai/compare/aws-iot-core-vs-zephyr-rtos) |
| 2 | [Golioth](https://www.vioscale.ai/software/golioth) | 66 | 26% (low) | [Zephyr RTOS vs Golioth](https://www.vioscale.ai/compare/golioth-vs-zephyr-rtos) |
| 3 | [balena](https://www.vioscale.ai/software/balena) | 64 | 33% (low) | [Zephyr RTOS vs balena](https://www.vioscale.ai/compare/balena-vs-zephyr-rtos) |
| 4 | [Memfault](https://www.vioscale.ai/software/memfault) | 56 | 43% (low) | [Zephyr RTOS vs Memfault](https://www.vioscale.ai/compare/memfault-vs-zephyr-rtos) |
| 5 | [FreeRTOS](https://www.vioscale.ai/software/freertos) | 47 | 29% (low) | [Zephyr RTOS vs FreeRTOS](https://www.vioscale.ai/compare/freertos-vs-zephyr-rtos) |
| 6 | [ESP-IDF](https://www.vioscale.ai/software/esp-idf) | 43 | 28% (low) | [Zephyr RTOS vs ESP-IDF](https://www.vioscale.ai/compare/esp-idf-vs-zephyr-rtos) |
| 7 | [Apache NuttX](https://www.vioscale.ai/software/apache-nuttx) | 42 | 11% (low) | [Zephyr RTOS vs Apache NuttX](https://www.vioscale.ai/compare/apache-nuttx-vs-zephyr-rtos) |
| 8 | [RIOT OS](https://www.vioscale.ai/software/riot-os) | 36 | 23% (low) | [Zephyr RTOS vs RIOT OS](https://www.vioscale.ai/compare/riot-os-vs-zephyr-rtos) |

Zephyr RTOS itself ranks #5 of 9 in Embedded IOT Dev.

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*Source: Vioscale (https://www.vioscale.ai/alternatives/zephyr-rtos). Generated 2026-09-01T14:25:39.017Z.*