Below is an OSS alternative, originating from same engineering as stable diffusion. There is other awesome work in rom1504's Github I recommend exploring as well.
https://rom1504.github.io/clip-retrieval/ (usually performant)
https://rom1504.github.io/clip-retrieval/ (usually performant)
Other people have done a few alternate front ends already
This one is meant to be functional, but could sure be made prettier