Home Assistant
Open source home automation
The Lens
By Erik Loyd, SaaS CEO and former COO/CFO of an AWS Premier Partner.
Updated Aug 2026
Home Assistant runs your smart home on your own hardware instead of somebody else's cloud. Lights, thermostats, cameras, locks, sensors, media players, vacuums: one dashboard and one automation engine sitting on top of more than a thousand built-in integrations covering thousands of device brands. Apache 2.0, free forever, no feature tiers.
Everything stays local by default, which is the actual reason to run it. Your motion sensor data does not leave the house unless you send it somewhere. Install Home Assistant OS on a dedicated box and it manages its own updates and add-ons; run the Docker container instead and you own the update cycle. Either way, plan on a weekend for the first setup. YAML is mostly gone from daily use but still turns up in advanced automations.
Hardware is where the math changed in 2026. Home Assistant Green is $199 with the OS preinstalled, plus $49 for the Connect ZBT-2 dongle if you want Zigbee or Thread. Building on a Raspberry Pi 5 used to undercut that easily, but two memory-driven price hikes this year pushed the 16GB board to $305, so official hardware is now the cheaper path unless you already own a spare machine. Home Assistant Cloud (Nabu Casa) stays $6.50/mo or $65/yr for remote access, voice assistants, and automatic SSL, and it funds the project.
The catch: integrations break. Releases ship monthly and a vendor API change can take a device offline until somebody patches it. 2026.8 alone dropped Volvo On Call and Permobil and forced a UniFi Protect upgrade. This maintains itself about as well as any hobby does.
Free vs Self-Hosted vs Paid
free self hosted paid cloudFree (Self-Hosted)
Everything in the software. Apache 2.0, no paid tier, no gated features.
- Home Assistant Core, OS, and Supervisor
- More than a thousand built-in integrations covering thousands of device brands
- Automation engine, dashboards, and the add-on system
- Local voice control (Assist) with on-device speech
Paid: Home Assistant Cloud (Nabu Casa)
$6.50/mo or $65/yr. Unchanged.
- Remote access with no port forwarding, VPN, or dynamic DNS
- Automatic SSL certificates
- Google Assistant and Amazon Alexa integration
- Cloud text-to-speech and speech-to-text for Assist
- Directly funds Home Assistant, ESPHome, Z-Wave JS, and the Open Home Foundation
Self-Hosted Costs
The software is free. Hardware got expensive in 2026.
- Home Assistant Green: $199, OS preinstalled, no assembly. Add the Connect ZBT-2 USB adapter at $49 for Zigbee or Thread (it does one protocol at a time, not both).
- Home Assistant Yellow: out of production. Kits still sell through distributors but need a Raspberry Pi Compute Module 4 you source separately.
- Raspberry Pi 5: $45 for the 1GB board up to $305 for 16GB after two memory-driven price increases in 2026. Home Assistant wants 2GB minimum and 4GB or more once you run add-ons.
- Old laptop, NAS, or x86 mini PC you already own: $0
- Electricity: a few dollars a year
When to Pay
Pay the $6.50/mo the day you want to reach your house from outside it. Rolling your own means DuckDNS, a reverse proxy, and certificate renewals you have to keep alive, and the failure mode is being locked out of your own home while traveling. Skip Cloud only if you already run Tailscale or a VPN and enjoy that layer.
On hardware, buy the Green unless you have a spare machine sitting idle. The DIY Raspberry Pi route stopped being cheaper in 2026 and it still leaves you flashing cards and picking a case.
Free and ungated to self-host. $6.50/mo for Home Assistant Cloud is the easy call, and in 2026 the $199 Green undercuts building an equivalent Raspberry Pi.
What to do by team size
- Solo
- free; this is the whole audience, budget a weekend for setup and $199 for a Green if you have no spare hardware
- Small team
- free; a household or small office can share one instance, but there is no real multi-user or role model
- Medium team
- free; not team software, and there is no per-seat story to evaluate
- Large team
- free; commercial building automation is not what this is, look at purpose-built BMS tooling
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