Como alternativa OpenSource a WeTransfer, yo os traigo https://transfer.zip/
Transfer.zip - Send Large Files | 100GB+

Ultrafast, Reliable and Secure file transfers. No throttling. No size limits. Open source.

@yepes mmmm interesante, el plan gratuito implica enviar directamente el archivo del ordenador origen al destino sin quedar copia en los servidores de la empresa...

Free $0

Full access to Quick Transfers
Use without an account
No limit on file size
Transfers expire when browser tab is closed
No storage

How do Quick Transfers work?

It uses WebRTC for peer-to-peer data transfer, meaning the files are streamed directly between peers and not stored anywhere in the process, not even on transfer.zip servers. To let peers initially discover each other, a signaling server is implemented in NodeJS using WebSockets, which importantly no sensitive data is sent through. In addition, the file data is end-to-end encrypted using AES-GCM with a client-side 256 bit generated key, meaning if someone could impersonate a peer or capture the traffic, they would not be able to decrypt the file without knowing the key. Because the file is streamed directly between peers, there are no file size or bandwidth limitations.