Samsung Just Put A Price On An API That Used To Be Free. Home Assistant Users Are The Ones Who Pay For It.

Here we go again.

Samsung's SmartThings quietly posted a blog update in June announcing that its API, the thing that lets other platforms talk to your SmartThings-connected devices, stops being free in October 2026. Individual, non-commercial developers will pay $4.99 a month. Commercial partners get their own paid tiers, details still to come. If you only ever use the official SmartThings app, nothing changes for you. If your smart home talks to SmartThings through anything else, and for a huge number of people that means Home Assistant, you're the one who now needs a subscription just to keep the integration working the way it always has.

Home Assistant's own founder, Paulus Schoutsen, didn't sugarcoat it. His team is "disappointed," and he's been blunt that people will now have to decide whether they want to climb over "yet another cloud paywall."

The part that makes it sting

Go back to 2014, when Samsung bought SmartThings. Their own announcement at the time said, in their own words, that it "has always been our goal to create a totally open smart home platform that brings together third-party developers, device makers, and consumers." That's not me putting words in their mouth. That's their blog, still live, still linked from their own site today.

Twelve years later, the company built on that promise is charging rent on the exact thing that made it true. The app still works. The lights still turn on from your phone. But the moment you want your own purchased hardware to talk to a platform you actually control, there's a toll booth now.

It's never really about the $5

Samsung's justification is the usual list: platform stability, enterprise-grade reliability, better developer tools. Maybe some of that is genuine. But notice what isn't published yet: the rate limits, the overage rules, what happens if you're a step above "individual developer" without being a real business. Nobody outside Samsung knows the full shape of this yet, and the people finding out in October are the ones who already paid for the hardware.

That's the pattern worth paying attention to, not the $4.99 itself. Today it's a metered API fee. Tomorrow it's a stricter rate limit, a feature moved behind a higher tier, a "commercial use" definition that quietly catches more people than it used to. Once a manufacturer controls the only door between your device and your automation platform, they get to reprice that door whenever the roadmap needs it.

Why this can't happen on a KNX install

A KNX system doesn't have an API to paywall, because there's no cloud vendor sitting between your switch and your automation logic in the first place. Every group address is set once, at commissioning, on hardware from any certified manufacturer, and none of it phones home to ask permission to keep working.

Home Assistant still earns its place as the brains on top of the bus in the installs I build, reading sensors, running routines, giving you one dashboard. But it's talking to your own wired KNX bus directly, not renting API calls from a manufacturer's cloud that can change its mind about pricing on a Tuesday in June.

The bit most people miss

Plenty of homeowners here have a Samsung fridge, TV or washing machine sitting on SmartThings without knowing their broader automation setup quietly depends on that API staying free and stable. When a platform decides three years into your build that the free tier is over, you don't get a vote. You get a bill, or a broken integration, whichever the vendor picks.

Wire the automation logic into the building itself and that decision stops being anyone else's to make. It doesn't matter whose earnings call happens next quarter, or which API someone in Seoul decides to meter. The system you specified at design stage keeps doing exactly what it was built to do.

If you're speccing a build and want the automation layer to outlast every pricing decision a hardware vendor makes after you've paid for it, that's worth talking through before the walls close.

Just a conversation about what the project needs.

wayne@knxlogic.co.za | 082 564 3982 | www.knxlogic.co.za