Zynk vs PairDrop

PairDrop is free and open-source for quick same-network browser handoffs. But WebRTC only encrypts in transit, its FAQ admits you still have to trust the server, and closing the tab ends every pairing. Zynk is end-to-end encrypted, and your devices stay paired after you close it.

Download Zynk Visit PairDrop

A native app that remembers your devices

You want a menu-bar tray that's always there, not a browser tab that closes and ends every pairing.
You want end-to-end encryption, not WebRTC transit encryption that still requires trusting the server.
You want a conversation, voice notes, in-app preview, and PDF signing inside a native app.
You want to right-click "Send with Zynk" in Finder or Explorer instead of dragging files into a browser tab.
You want managed share and drop links and a CLI for scripts and servers.

Feature by feature

Feature by feature, what Zynk does and what PairDrop does.

Feature	Zynk	PairDrop
PlatformsZynk wins	Native apps on macOS, Windows, Linux, iOS, Android, and Android TV. Linux builds include Raspberry Pi and Steam Deck. CLI anywhere you can open a terminal.	Web browser or PWA. No native app.
NetworkZynk wins	Same Wi-Fi or over the internet.	Same local network by default. Temporary public rooms and 6-digit pairing codes for beyond-LAN.
EncryptionZynk wins	End-to-end encrypted. Only the receiver devices you send to can unlock the file.	WebRTC encrypts transfers in transit only, and PairDrop's FAQ says users still have to trust the PairDrop server.
Remembered devicesZynk wins	Sign in with your phone number. Your devices and contacts stay with you across sessions and networks.	Per-session room only. Closing PairDrop leaves all rooms.
Menu bar and trayZynk wins	Lives in the macOS menu bar and the Windows and Linux system tray. Drop a file onto a contact, paste a message, or see who's online without opening the main window.	A browser tab.
Finder and share menuZynk wins	Right-click "Send with Zynk" in Finder and Windows Explorer. Send from the iOS, Android, and macOS share menus.	Drag a file into the browser tab.
ConversationsZynk wins	Every device and every contact gets its own chat: text messages, emoji reactions, edits, replies, and full history.	Per-session room, gone when you close the tab.
Voice notesZynk wins	Record a voice note with a waveform inside the app and send it like any other file.	No.
In-app previewZynk wins	Optional preview for PDFs, video, audio, images, markdown, and code with syntax highlighting.	Browser handles it.
PDF signingZynk wins	Open a PDF, draw or type a signature, send the signed copy back. No third-party portal.	No.
Share linksZynk wins	Yes. Managed share and drop links.	Temporary public rooms with 6-digit pairing codes.
CLIZynk wins	Yes, anywhere you can open a terminal.	No.

PlatformsZynk wins

Zynk: Native apps on macOS, Windows, Linux, iOS, Android, and Android TV. Linux builds include Raspberry Pi and Steam Deck. CLI anywhere you can open a terminal.
PairDrop: Web browser or PWA. No native app.

NetworkZynk wins

Zynk: Same Wi-Fi or over the internet.
PairDrop: Same local network by default. Temporary public rooms and 6-digit pairing codes for beyond-LAN.

EncryptionZynk wins

Zynk: End-to-end encrypted. Only the receiver devices you send to can unlock the file.
PairDrop: WebRTC encrypts transfers in transit only, and PairDrop's FAQ says users still have to trust the PairDrop server.

Remembered devicesZynk wins

Zynk: Sign in with your phone number. Your devices and contacts stay with you across sessions and networks.
PairDrop: Per-session room only. Closing PairDrop leaves all rooms.

Menu bar and trayZynk wins

Zynk: Lives in the macOS menu bar and the Windows and Linux system tray. Drop a file onto a contact, paste a message, or see who's online without opening the main window.
PairDrop: A browser tab.

Finder and share menuZynk wins

Zynk: Right-click "Send with Zynk" in Finder and Windows Explorer. Send from the iOS, Android, and macOS share menus.
PairDrop: Drag a file into the browser tab.

ConversationsZynk wins

Zynk: Every device and every contact gets its own chat: text messages, emoji reactions, edits, replies, and full history.
PairDrop: Per-session room, gone when you close the tab.

Voice notesZynk wins

Zynk: Record a voice note with a waveform inside the app and send it like any other file.
PairDrop: No.

In-app previewZynk wins

Zynk: Optional preview for PDFs, video, audio, images, markdown, and code with syntax highlighting.
PairDrop: Browser handles it.

PDF signingZynk wins

Zynk: Open a PDF, draw or type a signature, send the signed copy back. No third-party portal.
PairDrop: No.

Share linksZynk wins

Zynk: Yes. Managed share and drop links.
PairDrop: Temporary public rooms with 6-digit pairing codes.

CLIZynk wins

Zynk: Yes, anywhere you can open a terminal.
PairDrop: No.

What we noted

PairDrop is free, libre, and private for same-network use. No signup, no setup, Docker self-hosting, QR codes, and it works in any browser tab. For a quick one-off handoff on the same Wi-Fi, it's hard to beat.
For a quick handoff on the same network with nothing installed and nothing remembered, PairDrop is hard to beat, and self-hosting is a real plus if you want to run your own. Zynk fits better when transfers recur or have to leave the network.