Send files to yourself, to people, or to a small team. Works across any network — and you always know what happened to every file.
What TetherBay does — in under a minute.
One product for daily personal use, quick sharing, and small-team collaboration.
Move files between your own Mac, Windows, Linux, and phone. No USB cable, no same Wi-Fi, no cloud upload. Pick a file, pick a device.
Create an expiring link. The recipient downloads in the browser — no app needed. See when it's opened, downloaded, or expired. Revoke any time.
Create a folder with your team. Files sync across everyone's devices. Invite by link or QR code. Roles and access control keep things tidy.
No account required. No configuration. No same-network requirement.
Download for Windows, Mac, or Linux. One installer, no setup wizard.
Drag and drop or use the send button. Photos, documents, folders — anything.
Your other device, a person, or an expiring link. Real names, real online status.
Watch it arrive. Delivered, waiting, downloaded, expired — you always know.
Everyone says "secure." TetherBay also makes you feel calm — real status for every transfer, not just a progress bar.
Find any transfer in your history. Resend, revoke, copy link, or show in folder.
⚠️ Beta — transport-encrypted only. TetherBay currently protects your data in transit with TLS. It does not yet provide end-to-end encryption: the relay server can technically access file and clipboard contents while they pass through. Do not use TetherBay for confidential or sensitive data during the beta. End-to-end encryption is planned before public release.
The server helps devices find each other. Data in transit is encrypted with TLS. (End-to-end encryption planned before public release.)
All features are free during beta. These tiers activate after early access.
Folder sync, nearby transfer, cloud drives, and private networks solve different jobs. TetherBay focuses on private delivery across devices, people, and clipboard.
| TetherBay | LocalSend | Syncthing | Resilio Sync | Dropbox | Tailscale | |
|---|---|---|---|---|---|---|
| Main job | Send files + clipboard | Nearby file send | Folder mirroring | P2P folder sync | Cloud drive | Private network |
| Works across networks | Yes | Same LAN only | Yes | Yes | Yes | Yes |
| No cloud drive | Yes | Yes | Yes | Yes | Cloud drive | Yes |
| Ad-hoc delivery | Built in | Nearby only | Folder first | Sync first | Share links | Not a file app |
| Delivery status | Full | Transfer only | Sync state | Sync state | Partial | None |
| Offline recipient buffer | Temporary relay | No | Peer with file online | Peer with file online | Cloud | No |
| Clipboard sync | Text + images | No | No | No | No | No |
| Expiring share links | Yes | No | No | No | Paid controls | No |
| Shared folders | Yes | No | Yes | Yes | Yes | Via file shares |
| Free tier | Yes | Fully free | Fully free | Yes | 2 GB | Yes |
Download TetherBay for free. No account, no credit card. Works on Windows, macOS, and Linux.
Questions, feedback, or partnership inquiries? We'd love to hear from you.
We typically respond within 24 hours on business days. For urgent issues, include "urgent" in the subject line.