Calaos review
A capable open-source hub for DIY users who need PLC, KNX and MQTT support.
Reviewed by iTechGuides Editors · Editorial team · Updated Nov 2026
Calaos is an open-source home-automation project for DIY users and installers building a local control system. It combines a server, configuration tools, interfaces and Calaos OS, with automation for connected devices such as lights, shutters and heating. Scenarios can respond to time or other conditions, while local control is available through web, touchscreen and mobile interfaces for iOS and Android. As open-source software, it is available without a paid subscription.
Its strongest fit is an ecosystem built around established home and building protocols. Calaos documents support for Wago PLC, KNX, MQTT and Zigbee through Zigbee2MQTT, alongside integrations for MJPEG cameras, Enphase Envoy photovoltaic gateways and Philips Hue through Hue2mqtt. That combination gives technically oriented households a path to combine automation, surveillance and energy monitoring in one system. Users choosing Calaos should confirm that their devices use these supported protocols or have a compatible bridge.
Deployment is the main consideration. Calaos OS is intended for installation on a dedicated computer, and the project also supports self-hosted and mobile deployment. That setup suits owners comfortable managing local infrastructure, but it is less appropriate for anyone seeking a hosted, turnkey service. The project is community-maintained, and it does not include AI features. Choose Calaos when open-source control, local operation and protocol coverage matter more than a managed onboarding experience; consider another home-automation option if you prefer minimal administration or a broader assistant-led feature set.
Questions about Calaos
What does Calaos run on? Web, Linux, iOS and Android. It runs in the cloud, self-hosted and as a mobile app.
What does Calaos integrate with? 7 integrations, including Wago PLC, KNX, MQTT, Zigbee2MQTT and MJPEG cameras.
Who is Calaos built for? Solo users and small businesses (our editorial estimate).
Calaos pros and cons
- Where it wins
- Free, open-source automation with scenarios and rules
- Supports Wago PLC, KNX, MQTT and Zigbee2MQTT
- Web, touchscreen and mobile interfaces with camera and energy integrations
- Where it doesn't
- Requires a dedicated computer or self-hosted setup
- Community-maintained project
- No AI features
Calaos fact sheet, pricing and score →
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