I'm surprised it's not listed on the README directly but in case you looked for it like me :) here is what their site says about the alternative you're probably thinking of:

"toss cleverly encodes port information in the code phrase, making it simple but it requires using connected computers (no firewalls) and the long random-ish code phrase is hard to “tell” someone. magic-wormhole has most everything (currently its missing capabilities for multiple file transfers and file resuming), but it requires installing lots of the python ecosystem which is tricky for non-developers (and windows users)."