Is AlterSend like Blip?

Yes — both send files directly between your devices, peer-to-peer and end-to-end encrypted, over the internet. The main difference is that AlterSend is fully open source (Apache-2.0) and auditable, while Blip is proprietary.

Is AlterSend open source?

Yes. AlterSend is Apache-2.0 licensed, so anyone can read the code and verify exactly how your files are handled. Blip is closed source.

Does AlterSend work on Linux?

Yes — Windows, macOS, Linux, iOS, and Android. Blip covers Windows, Mac, iPhone, and Android, but not the Linux desktop.

Are my files private with AlterSend?

Yes. Files travel directly between devices, end-to-end encrypted, and are never stored on a server — the same peer-to-peer model Blip uses.

Is there a file size limit?

No. Both AlterSend and Blip transfer directly rather than uploading to a service, so there's no size cap.

Yes — free and open source, with no ads and no paid tier for the transfer core.

AlterSendDownload

AlterSend vs Blip.

Blip sends files directly between your devices, and so does AlterSend — both peer-to-peer and end-to-end encrypted. The difference: AlterSend is fully open source and auditable, and it runs on Linux too.

Download free See the comparison →

AlterSend desktop app — a private, unlimited alternative to Blip

The difference, side by side

Blip

AlterSend

Direct peer-to-peer transfer

Yes

End-to-end encrypted

Yes

Works over the internet

Yes

No cloud storage

Yes

Open source

No — proprietary

Yes — Apache-2.0

Linux desktop app

Yes

File size limit

None

Why switch

Where AlterSend pulls ahead

Fully open source

AlterSend is Apache-2.0 — anyone can audit exactly how your files are handled. Blip is proprietary.

Works on Linux too

Windows, Mac, Linux, iPhone, and Android. Blip skips the Linux desktop.

Same peer-to-peer privacy

Both transfer directly, end-to-end encrypted, with no cloud storing your files — AlterSend just does it in the open.

Just pair and send

Scan a code once and your devices remember each other. No account, no email.

Send a file in seconds

01
Install on both devices
Free on Windows, Mac, Linux, iPhone, and Android.
02
Scan a code to pair
One QR scan connects them. Pair once — they remember each other.
03
Send, directly
Files go straight across, encrypted. Any size, no cloud.

AlterSend transferring files directly between a computer and a phone, end-to-end encrypted

Questions

Direct and private — now fully open source.

Free, open source, and native on Windows, Mac, Linux, iPhone, and Android.

Download free Star on GitHub