WeTransfer - WeTransfer is a free service to send big or small files from A to B.

Box - Box offers secure content management and collaboration for individuals, teams and businesses, enabling secure file sharing and access to your files online.

Dropbox - Online Sync and File Sharing

e2ee cloud - e2ee-cloud is a open source, self-hosted, end-to-end encryption software.

Wormhole.app - Wormhole lets you share files with end-to-end encryption and a link that automatically expires.

Filecamp - Digital Asset Management & Online Proofing tools beautifully integrated, into one secure and cost-effective solution. Manage all your digital marketing assets from your own good-looking, easy-to-use spot in the cloud. Unlimited users in all plans!