The three systems, defined
Before the comparison, you need to know what each system actually is — because they are not three flavours of the same thing. They are three different answers to the same question: where does the intelligence live?
Loxone — one brain, turnkey
Loxone is an Austrian system built around a central Miniserver: a small box that holds all the logic of the home. Devices connect over a wired Tree bus (free-form topology, no switches) or wirelessly over Loxone Air at 868 MHz. Programming is visual — you drag function blocks onto a canvas in Loxone Config. It is almost always installed by a certified partner, which is why a Loxone smart home is a service as much as a product.
KNX — the 30-year open standard
KNX is an open, vendor-neutral standard (ISO/IEC 14543-3) that has been running buildings for over three decades. Devices from 500+ manufacturers — Gira, Jung, ABB, Busch-Jaeger — all speak the same language over a dedicated twisted-pair bus. There is no central brain: intelligence is distributed across every device on the line. It is programmed with ETS, a professional tool, and almost always by a certified integrator.
Home Assistant — the open-source workhorse
Home Assistant is free, open-source software that runs on a Raspberry Pi or a small PC. It talks to more than a thousand brands and protocols — Zigbee, Z-Wave, Matter, WiFi, Bluetooth — and ties them into one hub you control with YAML and a no-code UI. There is no installer and no invoice. You are the integrator, and the community is your manual.
Architecture: how each one talks
This is where the systems genuinely differ, and where most buyers get misled by a spec sheet.
- KNX is a bus. One cable loops through the house, and every device carries its own logic. If one device dies, the rest keep working — there is no single point of failure. This is why hospitals and offices trust it.
- Loxone is a star. Everything routes back to the Miniserver. One brain means simpler cabling and more powerful cross-device logic, but that brain is a single point of failure — mitigated with a redundant second Miniserver on critical projects.
- Home Assistant is a mesh. Wireless devices (Zigbee/Z-Wave) relay messages to each other back to your hub. It is cheap and flexible, but a wireless mesh will always be slightly less deterministic than a dedicated cable.
Programming & who installs it
The real cost of a smart home is rarely the hardware — it is the programming, and how much of it you can do yourself.
- KNX is programmed in ETS, a specialist's tool. It is powerful and precise, but it is not something you pick up on a weekend. You hire a certified integrator.
- Loxone is programmed visually in Loxone Config. A trained partner can set up a whole home far faster than ETS, and end-users can adjust scenes themselves — but the initial build is still professional work.
- Home Assistant is programmed by you. The learning curve is real, but it is free, endlessly customisable, and there are thousands of tutorials and pre-built blueprints.
What it costs
Rough 2026 ranges for a whole-home installation, hardware plus labour. If you want the full breakdown for the Loxone route, we wrote a complete Loxone cost guide.
| System | Typical installed cost | Who installs it | Best for |
|---|---|---|---|
| Home Assistant | €100 – €1,000 (DIY) | You | Tinkerers, budget builds, flexible homes |
| Loxone | €4,000 – €25,000 | Certified partner | Turnkey premium residential |
| KNX | €8,000 – €35,000+ | Certified integrator | Large homes, commercial, maximum longevity |
When the internet dies
All three systems can run fully local — this is the single most important thing they share, and the thing that separates them from consumer ecosystems like Alexa or Google Home, which stop thinking the moment the connection drops.
KNX is local by physical design — the bus has no cloud dependency at all. Loxone processes everything on the Miniserver inside your walls. Home Assistant runs on hardware in your cupboard. Cloud access is optional, for remote control only — never required for the system to do its job.
Vendor lock-in & longevity
How hard is it to change your mind later? This is where smart home automation without vendor lock-in matters most.
- KNX is the gold standard for longevity. It is an open standard, so a device from one manufacturer can be replaced with another brand a decade later. The standard has been stable for 30 years and shows no sign of changing.
- Loxone is a single-vendor ecosystem. That is a trade-off: you get a tightly integrated, well-supported system, but you are committed to Loxone's hardware for the life of the install.
- Home Assistant has zero lock-in — it is open source — but its longevity depends on you. It lives as long as you maintain it.
Which one should you choose?
Strip away the marketing and the choice is honestly quite clean:
- You love tinkering, you're on a budget, you want total control → Home Assistant. Start small, grow forever, and you can even use it to bridge the other two.
- You want a turnkey, premium home that just works, installed by professionals → Loxone. It is the fastest system to program well and the most pleasant to live with day to day.
- You're building large, or you need maximum reliability for decades → KNX. Nothing beats a 30-year open bus when failure is not an option.
And these systems are not enemies — they coexist. Home Assistant can talk to a KNX bus through an IP interface, and to a Loxone Miniserver through its integration. The best homes in 2026 are often hybrids, with the reliability of a bus and the flexibility of open software on top.
Not sure which path fits your project? NexLine are certified Loxone partners and design smart homes in the Netherlands and Portugal — from architecture to programming. hello@nexline.ai
Frequently asked questions
Is Loxone better than KNX?
Not better — different. Loxone's central Miniserver with visual programming makes it fast to install and ideal for premium residential homes. KNX's decentralized bus has no single point of failure and is preferred for large or commercial buildings. It depends on size, budget and reliability needs.
Can Home Assistant replace Loxone?
For a technical DIY user, yes — Home Assistant automates lighting, climate, security and energy at a fraction of the cost, and it even integrates with Loxone and KNX. The trade-off is that you become the integrator: setup, maintenance and reliability are your responsibility.
Which is cheapest?
Home Assistant, at €100–€1,000 in hardware plus your own time. Loxone sits mid-to-premium at €4,000–€25,000 installed. KNX is the most expensive, €8,000–€35,000+, reflecting certified integrators, dedicated bus cabling and professional ETS programming.
Do these systems work without the internet?
Yes. All three run fully local. Cloud connectivity is optional, for remote access only — never required for the system's core function inside the home.