The authors propose insulating amorphous magnets as platforms for superfluid spin transport. The key observation is that structural disorder in this class of materials can average out the effect of anisotropies, which usually inhibit the onset of spin superfluidity. A hydrodynamical description of the flow of angular momentum injected by spin accumulation in adjacent heavy metals is developed. The theory is valid for a broad class of magnets with frustrated interactions, where spin currents are defined in terms of coherent rotations of a noncollinear texture. Their stability, ascribed to the topology of the emergent SO(3) order parameter, resembles the phenomenology of chiral superfluids like He- or spinor condensates with ferromagnetic order. Viewing SO(3) as the projective space RP, one can see that the elementary relaxation processes for the spin superflow are provided by 4 phase slips.