Available worldwide
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.
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 alternatives
Other embedded iot dev we track, ranked by the same independent score.
- AWS IoT CoreManaged cloud platform for connecting, authenticating, and managing IoT device fleets at scalelow · 34%
- GoliothCloud infrastructure for building and managing IoT devices with AI capabilitieslow · 26%
- balenaSimplified management platform for containerized IoT device fleets at scalelow · 33%
- MemfaultA cloud platform that provides real-time monitoring, debugging, and firmware update management for embedded devices and IoT systems.low · 43%
- FreeRTOSlow · 29%
- ESP-IDFlow · 28%
Compare Zephyr RTOS
Side by side against other embedded iot dev, attribute by attribute, with a source on every value.
The Vioscale 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 |
|---|---|---|---|---|
| Pricing transparency | 80 | 0.08 | 6.7 | ✓ |
| Development activity | 63 | 0.09 | 5.9 | ✓ |
| Price level | 100 | 0.05 | 5.2 | ✓ |
| Release cadence | 97 | 0.05 | 5.0 | ✓ |
| Security score | 71 | 0.04 | 3.0 | ✓ |
| Capabilities | 29 | 0.08 | 2.4 | ✓ |
| Stars | 80 | 0.03 | 2.1 | ✓ |
| Integrations | 9 | 0.09 | 0.8 | ✓ |
| Reliability | 0 | 0.07 | 0.0 | - |
| Dependent projects | 0 | 0.06 | 0.0 | ✓ |
| Security posture | 0 | 0.07 | 0.0 | - |
| Package downloads | 0 | 0.14 | 0.0 | - |
| Developer Q&A activity | 0 | 0.06 | 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 · 2026-08-26 · 65% |
Adoption
Features
| Attribute | Value | Evidence |
|---|---|---|
| Capabilities | Open source: Yes · Target class: both | mediumsource · 2026-08-21 · 60% |
Integrations
| Attribute | Value | Evidence |
|---|---|---|
| Count | 1 | mediumsource · 2026-08-21 · 60% |
Language
| Attribute | Value | Evidence |
|---|---|---|
| Primary | C | highsource · 2026-08-26 · 90% |
License
| Attribute | Value | Evidence |
|---|---|---|
| Spdx | Apache-2.0 | highsource · 2026-08-26 · 95% |
Market
| Attribute | Value | Evidence |
|---|---|---|
| Availability | PrimaryMarkets: … · AvailabilityScope: global · AvailableCountries: … · NotAvailableCountries: … | highsource · 2026-08-21 · 75% |