AlterSend
End-to-end encrypted peer-to-peer file transfer between devices, with no cloud storage
About AlterSend
AlterSend is an open-source peer-to-peer file transfer app with end-to-end encryption. It can send files to other devices or let recipients download them in a browser through a link. Devices can be paired with a QR code or short code, and files are transferred directly between devices without cloud storage; individual files, folders, and text can all be sent. Each session uses a new key stored in the operating system keychain; the client is licensed under Apache-2.0.
Best for
Best use cases
Send files directly between devices
Send files to others via a link
Send large files or entire folders
Send quick text notes
Compare before choosing
The official comparison page states that AlterSend supports cross-platform use, unlimited size, no cloud storage, and transfers over the Internet or Wi-Fi.
Features
End-to-end encryption
A new key is used for each session; the key is stored only in the device operating system's keychain.
Direct device transfer
Files move between two devices without being written to an intermediate location.
QR code or short-code pairing
After the first pairing, the devices recognize each other and transfer files directly thereafter.
Link-based browser download
The recipient can open the sharing link to download in a browser without installing an app or creating an account.
Pros
- End-to-end encryption; keys are held only by the devices
- Files exist only on the devices at both ends of the transfer
- Download in a browser via a link, with no installation required
- Apache-2.0 open-source client