KEIBIDROP connects two devices directly. Files transfer over a post-quantum encrypted channel. The relay, if used, forwards bytes it cannot decrypt.
Open source · MPL-2.0 · macOS, Windows, Linux, Android, iOS
KEIBIDROP solves a specific problem: getting files from one device to another without uploading them to someone else's server.
Any file size, any number of files, no bandwidth quota. Send a 5 KB config or a 500 GB database dump. Transfers resume on reconnect.
In virtual folder mode, files are streamed on access. Open a 4 GB video and it starts playing immediately. The full file downloads in the background.
ML-KEM-1024 + X25519 hybrid key exchange. AES-256-GCM or ChaCha20-Poly1305 for data. The relay, if used, forwards bytes it cannot decrypt.
Files travel directly between devices. There is no upload-then-download step. On a local network, it saturates gigabit ethernet.
On the same WiFi, devices discover each other automatically. On different networks, they connect through an encrypted relay.
macOS, Windows, Linux, Android, iOS. Desktop GUI for regular use, CLI for scripting and servers, agent mode for automation.
Pick files and send them directly, or mount a shared folder that both peers can read and write to.
Drag files in. Your peer saves what they need.
Peer files appear as a folder. Open in any app.
The shared mount is a standard filesystem. Your file manager, terminal tools, git, rsync, IDEs all work on it.
Peer's files visible in Finder. Open, copy, or stream them.
git clone, git log, git status all work over the shared mount.
In direct transfer mode, directories show up as navigable folders. You can drill into them and save individual files.
Browsing a git repository received from a peer. Folder structure, source files, and docs all preserved.
The code is open source and the cryptography is auditable.
Key exchange uses ML-KEM-1024 + X25519 (hybrid, so it is secure against both classical and quantum attacks). Data encryption uses AES-256-GCM or ChaCha20-Poly1305, negotiated per session. When a relay is involved, it forwards encrypted bytes that it cannot decrypt. The full engine is open source under MPL-2.0.
Three steps to a secure connection.
Each device generates a code. On the same WiFi you can toggle LAN mode and skip the codes entirely.
Copy your code and send it to your peer over Signal, email, or a sticky note. They paste it, you paste theirs.
Press connect. Drag files in, or open the shared folder. The connection is encrypted end-to-end from the first byte.
KeibiDrop is the only open-source tool that combines internet connectivity, cross-platform support, and a virtual shared folder.
| KeibiDrop | WeTransfer | LocalSend | AirDrop | |
|---|---|---|---|---|
| Works over the internet | Yes | Yes | No | No |
| Works on local network | Yes | No | Yes | Yes |
| No file size limit | Yes | 2 GB free | Yes | Yes |
| No account needed | Yes | No | Yes | Yes |
| End-to-end encrypted | Post-quantum | Server can read | TLS | TLS |
| Cross-platform | All platforms | Web | All platforms | Apple only |
| Virtual folder / FUSE | Yes | No | No | No |
| Open source | MPL-2.0 | No | Yes | No |