AltSendme 0.5.0

AltSendme delivers private, cross-platform P2P file sharing with end-to-end encryption, multi-gigabit speeds, NAT traversal, and zero data exposure.

Razvan Serea News Reporter Neowin · Jul 9, 2026 21:00 EDT with 0 comments

AltSendme

AltSendme is a minimal, cross-platform application designed for fast, secure, and private peer-to-peer file transfers. It allows users to send files or entire directories directly between devices without relying on cloud servers, accounts, or any personal information. Everything is encrypted end-to-end using modern protocols like QUIC and TLS 1.3, ensuring both strong security and low-latency performance. Transfers are verified with BLAKE3 for data integrity, and interrupted downloads automatically resume, making the experience reliable even on unstable connections.

You can transfer anything—images, videos, documents, and more. Integrity checks are performed on both ends, so your files are automatically verified for correctness during both sending and receiving.

AltSendme works seamlessly across local networks or long-distance links, capable of saturating multi-gigabit connections for extremely fast delivery. With built-in NAT traversal and encrypted relay fallback, it connects devices almost anywhere. The app integrates with the Sendme CLI and will soon support mobile and web platforms.

Fully free and open-source, AltSendme offers a lightweight, privacy-first alternative to traditional cloud-based services, removing size limits, upload costs, and unnecessary data exposure.

AltSendme 0.5.0 changelog:

Web version available at app.altsendme.com
Zero analytics, please raise issues as you come across them
Harden app trust boundaries
More test coverage - added end-to-end test cases verifying receiver temporary directory lifecycle and resume behavior
Added disarm mechanism to AutoCleanupDir to support preserving partial downloads for resume
Bug fixes