The software code of Matter is available to all developers free of charge. As an open-source project, the files are published on the online portal GitHub (link). Meaning: Anyone can develop devices with it. However, in this case, there is also no guarantee that everything will be implemented in conformity with the standard. Only certified Matter products, which have undergone a series of tests at official bodies, offer this level of certainty. Also, certain security features of the standard, such as the Distributed Compliance Ledger (DCL), are only available with certified products.