I haven’t yet tried it, but sample results look impressive:

It’s free to download, but usage carries a somewhat funky pricing structure. PetaPixel explains,

You’ll need to sign up for an API key through the website and be connected to the Internet while using it. You’ll be able to do 50 background removals in a small size (625×400, or 0.25 megapixels) through the plugin every month for free (and unlimited removals through the website at that size). If you work with larger volumes or higher resolutions (up to 4000×2500, or 10 megapixels), you’ll need to buy credits.