Lots of differences I think. Probably the main one is that Atomic's workspace will feel more familiar to those used to Adobe apps or Sketch. I think it'd be fai

Lots of differences I think. Probably the main one is that Atomic's workspace will feel more familiar to those used to Adobe apps or Sketch. I think it'd be fair to say proto.io focusses more purely on prototyping, while Atomic tries to integrate design, prototyping, collaboration and version control tools.