Onera replicates clinical-grade polysomnography, including EEG-based sleep staging, in a wireless, self-applied patch rather than a wired in-lab setup, competing on access and cost rather than signal novelty. Its "PSG-as-a-service" model bundling hardware with a cloud platform and interpretation services positions it closer to a diagnostics service provider than a pure device company, with over €55M raised reflecting institutional confidence in that model.