A new release of Atrium is out. Version 0.9.0 https://github.com/robstoll/atrium/releases/tag/v0.9.0

How does that compare to AssertK?

I don't really know AssertK, last time I looked at it, it wasn't that great but I think they progressed quite a bit. IMO the main advantage of Atrium compared to AssertK is that Atrium has better error reporting: https://github.com/robstoll/atrium#examples AssertK on the other hand can also be used for native which Atrium cannot yet (open a feature request if you would like to use it on native, so far I did not had this use case) Cannot really tell you more, let me know in case you do a comparison, would be interesting

yeah from what I see it is much more comprehensive

your welcome and please open an issue if you miss something