Home Assistant

Home Assistant connects and automates everything in your home: lights, thermostats, cameras, locks, media players, and 2,000+ other device types. Home Assistant ties everything together. Lights, thermostats, cameras, sensors, locks, media players, whatever. One dashboard, one automation engine, running locally on your hardware.

Home Assistant integrates with 2,000+ devices and services. It runs on a Raspberry Pi, a NAS, or any Docker host. Everything stays local by default; your data doesn't leave your network unless you choose to send it. The automation engine lets you build rules like "turn off all lights when everyone leaves" without writing code.

The largest open source home automation project by a wide margin. Free to self-host. Home Assistant Cloud (Nabu Casa) costs $6.50/mo and adds remote access, voice assistants, and automatic SSL without port forwarding. Anyone interested in smart home automation should try this. The learning curve is real but the community is massive and helpful.

The catch: initial setup can take a full weekend. YAML configuration, while being replaced by UI workflows, still shows up in advanced scenarios. And some integrations break after updates; the pace of development is fast, which is both a strength and a source of frustration.