American small ships also adopted active stabilization

Did the US Navy have equipment similar to the Denny-Brown stabilizer for smaller ships?

Yes, the United States developed comparable equipment, while the Royal Navy's requirements were strongly shaped by North Sea service.

American designers developed stabilization equipment comparable to the Denny-Brown system, although no particular mechanism or installation is identified. British interest in such equipment was strongly shaped by repeated service in the North Sea. Demanding sea conditions therefore influenced both design requirements and construction choices for smaller warships.