Networking stack
- AltSendmeQUIC via Iroh
- BlipUnknown
- LocalSendHTTPS/REST over TCP
- Magic Wormholeencrypted TCP
- PairDropWebRTC/DTLS (SCTP)
Open Source | AGPL 3.0
The fastest, smoothest way to transfer files to anyone, anywhere.
Your files go straight from device to device - encrypted, with no accounts, tracking, ads, or cloud storage in between.
Think of it like AirDrop for any device, any network.
Free, for files & folders of any size
AltSendme works by connecting sender and receiver directly, so there's no need to upload to a server, which means your transfers are truly private.
Fast
AltSendme can saturate a 4Gbps connection.
Resumable fetching
Interrupted downloads pick up where they left off.
Integrity checks
Data is automatically verified for correctness on both send and receive.
Secure & Instant. Works in 3 simple steps.
1. Drop a file or folder
AltSendme creates a secure one-time code (called a "ticket") for your file
2. Share the ticket
Copy ticket and send it via chat, email, or text to your recipient friend
3. They receive file
Your friend pastes the ticket in their app, and the transfer begins. file downloads directly.
One Experience.Multiple Platforms.
Desktop Applications
Native apps for Windows, macOS, and Linux. Drag, drop, and share files instantly with a full desktop experience.
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Android Application
Send and receive files on the go from your Android device with a minimalistic interface. iOS coming soon.
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Command Line Interface
Generate tickets in the terminal and share with the desktop app or mobile
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Web
Transfer files and folders without installing anything. Share with Desktop, Mobile or CLI
Open appWhy People Love AltSendmeFor Everyday File Sharing
Send files directly. No middlemen.
Works seamlessly on local networks or across continents.
Transfer Anything. Any file. Any Format.
Send files or directories of any size or any format, verified with BLAKE3-based integrity checks.
No Size Limits. Truly unlimited.
Send KB's to 999GB's. Altsendme helps you to share files of unlimited size.
Blazing Fast & Reliable
Capable of saturating multi-gigabit connections for lightning-fast transfers.
End-to-End Encrypted
Protected by QUIC + TLS 1.3 for forward and backward secrecy.
Resumable Transfers
Interrupted? No problem. Transfers automatically resume where they left off.
Zero Personal Data
No accounts, No ads. No tracking, No training. Just private file transfers.
Free & OpenSource
Built by community. Open by Design. Transparency and private by default.
Partners
Interested in Partnership?
We're always looking for organizations that want to collaborate and support open-source development.
Built To Outlive Us.
Open Source & Community Driven
AltSendme is built in public by contributors around the world. Every line of code is public. Every improvement is shared. Together, we're building a faster, more private way to send files directly between people.
8.5k starsJoin our Community
+ 65 Others
Open source is our way of giving back to the community and making sure what we're building outlives us.
Interact with us directly, suggest features, report bugs, get updates early, and help shape the future of file sharing.
Join us on DiscordFrequently Asked Questions
AltSendme is an open-source peer-to-peer file transfer app for desktop, Android, web, and CLI. It lets you send files and folders anywhere in the world with no accounts and no cloud storage. It is built on the Iroh networking stack and uses ticket-based sharing with NAT hole punching and encrypted relay fallback.
Yes. AltSendme is free and open source (AGPL-3.0) with no file size limits, no upload quotas, and no accounts. If you benefit from this work, consider supporting development through Buy Me a Coffee or GitHub Sponsors.
You can transfer anything: images, videos, documents, folders, and more. Integrity checks use BLAKE3 on both ends, so files are verified during send and receive. Transfers are resumable if interrupted.
AltSendme uses end-to-end encryption with QUIC + TLS 1.3. Files go directly between devices and are not stored on a cloud server. Relays only see encrypted traffic. Tickets authenticate the intended sender before a transfer starts.
Unlike browser-only WebRTC tools, AltSendme is a native app (plus Android, web, and CLI) built on Iroh/QUIC. You can send large files and full folders with pause/resume, fewer browser limits, and BLAKE3-verified streaming. See our full comparison for details.
