Zephyr RTOS
Real-time operating system for resource-constrained embedded systems
- Also known as
- zephyr-rtos
Available worldwide
What is Zephyr RTOS?
An RTOS that enables real-time task management on memory and power-limited embedded devices, supporting a wide range of processor architectures from simple sensors to network-connected applications.
Zephyr RTOS pricing
We don't have Zephyr RTOS's full plan breakdown yet (its pricing page resisted automated reading). Here's what we could confirm. Always check live pricing for exact numbers.
What Zephyr RTOS does
The capabilities that matter for embedded iot dev, normalised so it lines up with every alternative. “-” means we haven't confirmed it, not that it's missing.
- Target class
- Both
- Rtos type
- -
- Low power support
- -
- Tls dtls stack
- -
- Ota updates
- -
- Device management console
- -
- Device provisioning
- -
- Open source
- ✓
- PSA certified
- -
- Rust support
- -
Platform & deployment
Independently observed- Self-hosted
Integrations (1)
Independently observed- PlatformIO
Security & compliance
Known vulnerabilities: 0 (0 in the last 12 months) sourcea count reflects scale & disclosure, not quality
Zephyr RTOS FAQ
Common questions about Zephyr RTOS, answered from independent, dated evidence.
What is Zephyr RTOS?
Zephyr is a real-time operating system optimized for resource-constrained embedded devices, ranging from simple sensors to sophisticated IoT devices and gateways. It provides a small-footprint kernel supporting multiple processor architectures and is built with security and long-product-lifecycle support as core design principles. It is indexed under Embedded IOT Dev.
Source: https://zephyrproject.org
Is Zephyr RTOS free to use?
Zephyr RTOS is open source, so it can be self-hosted and used at no licence cost. It is released under the Apache-2.0 licence. Pricing changes often, so verify at source before relying on it.
Source: https://zephyrproject.org
Can Zephyr RTOS be self-hosted?
Yes. Zephyr RTOS can be deployed self-hosted, so it does not have to run on the vendor's infrastructure.
Source: https://zephyrproject.org
Is Zephyr RTOS open source?
Yes. Zephyr RTOS is published under the Apache-2.0 licence, a permissive licence that generally allows commercial use and modification. Licence terms can change between releases, so verify against the repository for the version you intend to use.
Zephyr RTOS alternatives
Other embedded iot dev we track, ranked by the same independent score.
- GoliothCloud infrastructure designed to connect and manage IoT and embedded deviceslow · 29%
- AWS IoT CoreFully managed service for connecting and orchestrating IoT devices at scalemedium · 56%
- balenaA container-based IoT platform for securely building, deploying, and managing edge device fleetslow · 43%
- MemfaultCloud observability and lifecycle management for embedded systemsmedium · 55%
- ESP-IDFA complete software development kit for building applications on Espressif microcontroller systemslow · 35%
- RIOT OSlow · 29%
Compare Zephyr RTOS
Side by side against other embedded iot dev, attribute by attribute, with a source on every value.
The vioscaleAI score: one lens on the evidence
Not user reviews and not a paid placement: a confidence-weighted blend of the independent signals below (adoption, activity, security posture, and more), which you can sort and re-weight yourself. Vendors can correct their listing but can never move their rank, and stars are weighted low as a vanity metric. It is one way to read the evidence for Zephyr RTOS, not the verdict.
| Signal | Score | Weight | Contribution | Evidence |
|---|---|---|---|---|
| Development activity | 63 | 0.12 | 7.6 | ✓ |
| Release cadence | 97 | 0.07 | 6.5 | ✓ |
| Security score | 71 | 0.05 | 3.8 | ✓ |
| Stars | 80 | 0.03 | 2.6 | ✓ |
| Capabilities | 29 | 0.08 | 2.4 | ✓ |
| Integrations | 9 | 0.05 | 0.5 | ✓ |
| Dependent projects | 0 | 0.08 | 0.0 | ✓ |
| Security posture | 0 | 0.09 | 0.0 | - |
| Package downloads | 0 | 0.17 | 0.0 | - |
| Developer Q&A activity | 0 | 0.08 | 0.0 | - |
Computed . Re-weight it by intent, or see the full method.
All data & sourcesshow ↓
Every value we hold, with its source, retrieval date, and confidence. This is the evidence behind the score: don't trust it, verify it.
Activity
| Attribute | Value | Evidence |
|---|---|---|
| Commits last 30d | 100 | mediumsource · 2026-10-14 · 65% |
Adoption
Content
| Attribute | Value | Evidence |
|---|---|---|
| Faq | 4 items | mediumsource · 2026-09-10 · 69% |
Features
| Attribute | Value | Evidence |
|---|---|---|
| Capabilities | Open source: Yes · Target class: both | mediumsource · 2026-10-14 · 60% |
Integrations
| Attribute | Value | Evidence |
|---|---|---|
| Count | 1 | mediumsource · 2026-08-21 · 60% |
Language
| Attribute | Value | Evidence |
|---|---|---|
| Primary | C | highsource · 2026-10-14 · 90% |
License
| Attribute | Value | Evidence |
|---|---|---|
| Spdx | Apache-2.0 | highsource · 2026-10-14 · 95% |
Market
| Attribute | Value | Evidence |
|---|---|---|
| Availability | PrimaryMarkets: … · AvailabilityScope: global · AvailableCountries: … · NotAvailableCountries: … | highsource · 2026-08-21 · 75% |
Pricing
Release
Security
Is Zephyr RTOS the right choice for you?
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