Certification achieved
Home Assistant and its Matter Server were officially certified by the CSA – making it the first open-source platform to earn this recognition.
Helping Home Assistant achieve Matter certification
Challenge
Home Assistant wanted to become the first open-source smart home platform to earn Matter certification. Its unique architecture required a tailored approach beyond standard testing tools.
Our approach
We partnered with Home Assistant to build a bespoke, automated testing framework. Hundreds of reusable test scripts were developed and executed in custom labs to meet CSA compliance.
Results
Certification was achieved, boosting trust, ecosystem credibility and future readiness – setting a new benchmark for open-source smart home interoperability.
The challenge: Certifying an open-source smart home platform
Home Assistant, created by Nabu Casa and supported by the Open Home Foundation, is one of the world’s leading open-source smart home platforms. It gives people control over all their smart devices in one place – locally, privately and without depending on the cloud.
Home Assistant has always supported open standards like Matter, Zigbee, and Z-Wave. To strengthen its position and ensure seamless compatibility with other smart devices, the team set out to achieve Matter certification from the Connectivity Standards Alliance (CSA).
This certification would prove that Home Assistant’s software meets Matter standards and works reliably with other certified devices. It would also make the platform more trusted by users and device makers alike.
However, the process wasn’t simple. Home Assistant’s setup – certifying both its Matter Server and Home Assistant user interface to the Matter 1.3 specification – required a unique and tailored approach that couldn’t rely on standard tooling or processes.
Home Assistant’s implementations of Matter, Zigbee and Z-Wave are already industry-leading, so it only makes sense to clearly signal and give users peace of mind that we provide true compatibility.
Our approach: Creating a bespoke testing framework
We worked closely with the Home Assistant team from the start. Our focus was on collaboration, precision and building a custom testing framework that truly fit their needs.
Building bespoke automated tests
Acting as the official test partner, we developed hundreds of automated test scripts using the framework that was created by Home Assistant. These covered all devices that were cover by the Matter standard at the time (Matter 1.3). The scripts went beyond standard test suites – covering specific device types, integration behaviours and configuration nuances that existed within their platform. Each script was designed to be reusable for future Matter updates.
Testing and validation
Using our test labs and working closely with Nabu Casa, we executed the scripts, analysed results, identified compatibility gaps and liaised with the Home Assistant engineers to resolve them. The goal was to ensure that our reports met both technical and CSA compliance expectations.
What we delivered
A fully bespoke, automated test suite built specifically for Home Assistant’s architecture and Matter 1.3 implementation.
A customised, repeatable test process and lab setup tailored for Home Assistant’s software certification
Certified test results and documentation meeting CSA’s requirements.
The results: Certification, confidence and future-proofing
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Bespoke testing success
Our custom-built test environment proved that even complex open-source software can meet strict certification standards through tailored engineering.
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Greater trust and credibility
Certification confirms that Home Assistant’s Matter support is reliable and compliant.
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Reusable framework
The automated tests can be reused and extended for new versions of Matter, saving time and effort in future certifications.
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Stronger ecosystem position
The certification helps Home Assistant attract new device partners and strengthen its integration network.
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Technical growth
The collaboration enhanced both Home Assistant’s test capabilities and Resillion’s reputation for bespoke interoperability and certification work.
Home Assistant’s commitment to open standards and quality made this a truly collaborative effort,” said Bob Campbell, Global Head of Conformance and Interoperability, at Resillion. “Working together, we were able to translate a complex certification process into a repeatable, automated framework that not only achieved success today but will continue to support their growth in the future.
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