Sieve- Mask Learning

Sieve – Mask Learning built Sieve, an LLM routing gateway with an Android SDK that keeps users' personal data on the developer's own machine. On the Mac, Sieve sends easy requests containing personal data to local Muse Glimmer; the rest go to Muse Spark, with names, IDs and addresses swapped for placeholders and restored in the reply. If the local check fails, the request is refused. On 10 labelled synthetic cases with real models, every route was correct and no cloud request contained labelled personal data. It is pseudonymization, not anonymization: other content still reaches the cloud.