Email attachment replacements

Dropbox is a file hosting service operated by the American company Dropbox, Inc., headquartered in San Francisco, California, that offers cloud storage, file synchronization, personal cloud, and client software. Dropbox was founded in 2007 by MIT students Drew Houston and Arash Ferdowsi as a startup company, with initial funding from seed accelerator Y Combinator.

Microsoft OneDrive is a file-hosting service operated by Microsoft. First released as SkyDrive in August 2007, it allows registered users to store, share, back-up and synchronize their files. OneDrive also works as the storage backend of the web version of Microsoft 365. OneDrive offers 5 gigabytes of storage space free of charge, with 100 GB, 1 TB, and 6 TB storage options available, either separately or with Microsoft 365 subscriptions.

cloud service created by Yandex

Tresorit is a cloud storage platform that offers functions for administration, storage, synchronization, and transfer of data using end-to-end encryption.

Hightail, formerly YouSendIt, is a cloud service that lets users send, receive, digitally sign, and synchronize files. YouSendIt.com and YouSendIt Inc. were founded in 2004; the company renamed itself Hightail in 2013.