croc is a tool that allows any two computers to simply and securely transfer files and folders. AFAIK, croc is the only CLI file-transfer tool does all of the following:

allows any two computers to transfer data (using a relay)

provides end-to-end encryption (using PAKE)

enables easy cross-platform transfers (Windows, Linux, Mac)

allows multiple file transfers

allows resuming transfers that are interrupted

local server or port-forwarding not needed

faster than wormhole,  - 1/2