openHAB Foundation · Open-source Linux hubs
openHAB (on Raspberry Pi)
Wi-Fi · REST · about $100
cloud optionalcloud optional
Protocols
Wi-Fi
4 W
Idle power
$100
List price
~600
Devices (est.)
Specifications
| Category | Open-source Linux hubs |
|---|---|
| Protocols | Wi-Fi |
| Cloud dependency | cloud optional |
| Local API | REST |
| Voice assistants | Alexa, Google, local (Whisper/Rhasspy) |
| Open source | fully open-source |
| Directly supported devices (est.) | ~600 |
| Idle power draw | ~4 W |
| Update outlook | long-term support 5y+ |
| List price (Amazon.com, Q2/2026) | about $100 |
Best for: Tech enthusiast / tinkererBest for: Privacy-first
Setup & gotchas
☕ JVM-based means a 2GB Pi 4 is a stretch with openHAB + InfluxDB + Grafana running together. 4GB Pi 4 is the floor; an 8GB Pi 5 is the sweet spot.
Editorial take
Our hands-on read — the specs above are the sourced facts.
Strengths
- + Apache 2.0 license under the Eclipse Foundation — cleanest OSS governance of any hub
- + Over 400 add-ons (bindings) with strong KNX and legacy Z-Wave support
- + Multi-language rules engine: DSL, JavaScript, JSR223 Python
Trade-offs
- − Mainstream reach lags Home Assistant — smaller community, less video content
- − openHAB 4 changed the rules DSL — older 3.x tutorials are stale
- − JVM memory footprint is heavier than HA Python on a 2GB Pi 4
Related hubs
Frequently asked questions
Does the openHAB (on Raspberry Pi) require the cloud?
Not for core control. The openHAB (on Raspberry Pi) works locally (REST); the cloud is optional and mainly adds remote access and extra features.
Which protocols and voice assistants does the openHAB (on Raspberry Pi) support?
Protocols: Wi-Fi. Voice: Alexa, Google, local (Whisper/Rhasspy). It directly supports an estimated 600 devices/brands.
How much does the openHAB (on Raspberry Pi) cost and how much power does it use?
List price is about $100 (Amazon.com market observation, Q2/2026 — actual prices fluctuate). Idle power draw is roughly 4 W.
Source & last checked
- openHAB official site: openhab.org/ ↗
- Sources last checked: 2026-07-20 · Prices: Amazon.com market observation, Q2/2026
- Idle-power and device-count figures are vendor-claimed or community-measured estimates. Prices fluctuate. Details without warranty — check the current manufacturer spec sheet before buying.