Home Assistant is the world’s most popular open-source smart home platform, running locally on your own hardware and integrating over two thousand brands and services.
Home Assistant puts local control and privacy first: it runs on a small hub in your home — not in the cloud — and keeps working even when the internet is down. Its community has built integrations for an unmatched range of devices, from Zigbee and Z-Wave sensors to solar inverters, EVs and media players. A powerful automation engine, customizable dashboards, energy monitoring and built-in voice assistant support (Assist) make it the enthusiast standard, while the ready-made Home Assistant Green hub makes getting started simple.
The platform is stewarded by the Open Home Foundation and built by a huge open-source community, with major feature releases landing every month. Because automations run on your own network, lights respond almost instantly and your routines keep working during ISP outages — the main reason many enthusiasts migrate to Home Assistant from cloud-based platforms.
Home Assistant itself is completely free and open source — install it on a Raspberry Pi, mini PC or NAS. The official Home Assistant Green hub costs $99 for plug-and-play setup. The optional Home Assistant Cloud (Link) subscription from Nabu Casa adds easy remote access and cloud voice features for $6.50/month or $65/year, and funds development.
Smart home enthusiasts and privacy-conscious users who want maximum device compatibility and automation power without depending on any company’s cloud.