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.
What"s New in AltSendme 0.2.1:
- Improved User Experience - Files and directories received by the app now open automatically in your system’s file explorer (Finder on macOS).
- New Translations - Added support for Italian (it) and Czech (cs).
- macOS Universal Binary - A single universal macOS binary is now provided, compatible with both Apple Silicon and Intel processors.
Download: AltSendme 0.2.1 | 7.6 MB (Open Source)
Download: AltSendme for MacOS | 25.5 MB
Links: AltSendme Home Page | GitHub | Screenshot
