Redis is in-memory so it's prohibitive for big files. Also kvass still works if its disconnected from the server. This is important, if you want to use it for config files.

On the other hand, using redis (/skate) for storing files was the inspiration for creating kvass.

I thought it’s a password store. Also bc of the name “v” pronounced Spanish = b, so key-bass, sounds like pass

It's not Spanish, though, and in quite a few languages there's "w" instead of "v". https://en.wikipedia.org/wiki/Kvass