I present a study of a classically scale invariant model in which the Standard Model Higgs mass term is replaced by a Higgs portal coupling to a complex scalar field of a dark sector. The dark sector contains fermions and scalars charged under dark SU(2) x U(1) gauge interactions. Radiative breaking of the dark gauge group triggers electroweak symmetry breaking through the Higgs portal coupling. The model features a long-range abelian dark force as well as neutral dark fermions with the correct thermal relic abundance, and in reach of future direct detection experiments. Collider signatures include a dark sector scalar boson with mass < 250 GeV that decays through mixing with the Higgs boson, and can be detected at the LHC. The Higgs boson, as well as the new scalar, may have significant invisible decays into dark sector particles.