Lee Griggs shows the various ways to denoise a render using Arnold in both Maya and C4D.

Arnold provides a unified (more or less) experience in most of the DCCs that it supports. This new tutorial from Arnold Rendering Specialist Lee Griggs shows some of the ways you can denoise in Arnold MtoA and C4DtoA.

Arnold has CPU and GPU denoising tools and even allows you to use them as an Imager in the Arnold Render View as a post-rendering effect.