I am not sure if Fresh would be a direct competitor since it does not and will not[0] support client side routing. In every company I worked for in the last few years white flashes on page navigations were absolutely unacceptable.
I still like the framework, but it probably targets a more specific segment of the market. I think aleph.js[1] is more like next and then there is the esoteric ultra.js[2] which kind of tries to do something similar and be super bleeding edge.
[0] https://github.com/denoland/fresh/issues/403#issuecomment-11... [1] https://github.com/alephjs/aleph.js [2] https://ultrajs.dev/docs