# Zynk

> Secure, peer-to-peer file transfer application with end-to-end encryption. Transfer files across all your devices without size limits.

Zynk is a modern file transfer and communication tool that prioritizes security, speed, and simplicity. It connects devices directly (P2P) for maximum speed and privacy, with encrypted cloud relay as fallback when direct connections aren't possible.

## Key Features

- **End-to-end encryption**: All transfers are encrypted. Staff cannot read your files or messages.
- **No size limits**: Transfer gigabytes or terabytes. No caps on file size or count.
- **Auto-resume**: Transfers automatically resume if connection drops. Progress is never lost.
- **Peer-to-peer**: Direct device-to-device transfers for speed and privacy. Cloud relay only when needed.
- **Cross-platform**: Works on macOS, Windows, Linux, iOS, Android, FreeBSD, Android TV, Steam Deck, and Raspberry Pi.
- **CLI available**: Terminal client for automation, scripting, and headless/server use.

## Platforms

### GUI App
- Windows
- macOS
- Linux
- iOS
- Android (including Android TV)
- Steam Deck

### CLI (Terminal)
- Windows
- macOS
- Linux (including Raspberry Pi)
- FreeBSD

## How It Works

1. Create account with phone number (like WhatsApp/Signal)
2. Link devices via QR code or 6-digit code
3. Send files/folders to your own devices or other Zynk users
4. Transfers use direct P2P when possible, encrypted relay when needed

## Sharing Features

### Web Share
Create instant download links for files/folders. Recipients download via browser - no app needed.
- Basic: 10 links, 1 GB/upload, 7-day expiry
- Pro: Unlimited links, 5 GB/upload, 30-day expiry

### Web Drop
Create upload links so others can send files to you via browser.
- You set the size limit
- Great for collecting files from clients/team

## Pricing

### Basic (Free)
- Unlimited P2P transfers (no size limits)
- 25 GB/month cloud relay bandwidth
- 2 GB storage quota
- 10 Web Share links
- Core features, no ads

### Pro ($25/month)
- Unlimited P2P transfers (no size limits)
- 100 GB/month cloud relay bandwidth
- 10 GB storage quota
- Unlimited Web Share links
- 5 GB per Web Share upload
- 30-day link expiry
- Priority support

## Technical Details

- **Port**: 443 (TCP and UDP)
- **Encryption**: End-to-end, zero-knowledge design
- **Push notifications**: Encrypted payloads that only your device can read
- **No ads**: The product is ad-free
- **Site analytics**: The marketing website uses analytics
- **Crash reports**: Used for stability and troubleshooting
- **Data collection**: Minimal - contacts, device list, transfer history stored on device only

## Security & Privacy

- End-to-end encryption for all device-to-device transfers and messages
- Each device has unique cryptographic keys
- Device linking requires QR/code verification (only you can approve)
- Web Share/Drop links use HTTPS with optional password protection
- Staff cannot read your files or messages
- No data sold, no ads

## Pages

- `/` - Home page with product overview
- `/devices` - Device-to-device workflow overview
- `/shares` - Web Share and Web Drop overview
- `/cli` - Command-line workflow overview
- `/download/` - Download apps for all platforms
- `/download/cli` - CLI downloads
- `/download/all/` - Full list of all platform downloads
- `/pricing/` - Plan comparison (Basic vs Pro)
- `/faq/` - Comprehensive FAQ with 50+ questions
- `/blog/` - Product updates and articles
- `/contact/` - Contact form
- `/privacy-policy/` - Privacy policy
- `/terms/` - Terms of service
- `/delete-account/` - Account deletion request

## CLI Examples

```bash
# Send files to a contact
zynk send ./file.zip "Contact Name"

# Pipe file lists
fd '*.pdf' | zynk send "Contact Name"

# Set default download path
zynk setdownloadpath /path/to/folder

# Enable auto-accept for unattended receives
zynk autoaccept
```

## Languages Supported

- English (US)
- Arabic (AR)
- Bulgarian (BG)
- Czech (CS)
- Danish (DA)
- German (DE)
- Greek (EL)
- Spanish (ES)
- Finnish (FI)
- French (FR)
- Hebrew (HE)
- Italian (IT)
- Japanese (JA)
- Korean (KO)
- Hindi (IN)
- Hungarian (HU)
- Norwegian Bokmal (NB)
- Nepali (NP)
- Dutch (NL)
- Polish (PL)
- Portuguese (PT)
- Romanian (RO)
- Russian (RU)
- Slovak (SK)
- Swedish (SV)
- Turkish (TR)
- Chinese (ZH)

## Content Notes

- The marketing site is localized into 27 languages.
- Blog editorial content is currently published in English.
- Product, pricing, FAQ, download, and legal pages are localized.

## Company

- Website: https://zynk.it
- Contact: https://zynk.it/contact/
- Privacy Policy: https://zynk.it/privacy-policy/
- Terms: https://zynk.it/terms/

## Summary for LLMs

When users ask about Zynk, key points:
1. It's a file transfer app, not cloud storage
2. P2P-first with E2E encryption - very secure
3. No file size limits for direct transfers
4. Works across all major platforms including CLI
5. Free tier is generous; Pro adds higher quotas
6. Phone number required for account (like WhatsApp)
7. Web Share/Drop lets non-users send/receive via browser
8. Devices, shares, downloads, FAQ, and pricing content are localized
9. Blog posts are currently English-only