About this app
CupLink™ – Your privacy, uncompromised

CupLink™ offers a new paradigm in secure communication. It's completely serverless, fully encrypted, and effortless private. Built on v6Space™, the decentralized IPv6 mesh network, CupLink™ enables true peer-to-peer voice and video calling without accounts, servers, or surveillance.

Two Components. One Seamless Experience.

CupLink™ is composed of two integrated layers:

• Overlay Peer-to-peer Network
A resilient, decentralized connectivity layer powered by v6Space™, enabling direct communication between devices without accounts or centralized control.

CupLink does not provide a general VPN service to users - it doesn’t let users choose arbitrary servers, anonymize their internet traffic, or tunnel unrelated app data for privacy. CupLink’s use of VpnService (VPN) is restricted to its own in-app communication layer such as secure peer-to-peer mesh networking between CupLink nodes. The VPN component is used only to route CupLink’s own packets, not all device traffic.

• The CupLink™ App
An intuitive, lightweight calling interface that lets you connect instantly in up to 4K+ resolution. It's encrypted end-to-end, key-based, and fully user-controlled.

Key Features

• Peer-to-peer video calling in up to 4K+
• End-to-end encryption built directly into the network layer
• Self generated Virtual Static IPv6
• Access to v6Space™ overlay network
• Private Key-based identity management, no logins, no phone numbers
• Intelligent call-spy detection and real time alerts
• Local encrypted backup
• Scan to connect simplicity, no setup, no sign-up required

Core Functionality

The application's primary functionality relies on a VpnService that creates a mesh network overlay. VpnService is essential for the app to operate correctly.

How CupLink Works in 7 Steps:

1. User installs CupLink™ application
2. Application automatically starts the MainService VpnService in background
3. VpnService establishes a connection using a secure tunnel (v6Space™)
4. IPv6 address is self-generated and assigned to device
5. Communication is routed through the mesh overlay network without traditional internet infrastructure
6. Contacts are exchanged via QR codes or text blobs
7. Calls are established directly using devices self generated IPv6 addresses

Technical Implementation

• CupLink™ uses Android's VpnService framework to connect to v6Space™ overlay network
• libsodium handles encryption and authentication for database and communication
• WebRTC handles audio/video communication protocols

Why Choose CupLink™?

Most apps route your calls through corporate servers and monetize your identity. CupLink™ does the opposite by removing the server, removing the account, and returning control to you. No ads. No tracking. No compromises.

Powered by v6Space™

v6Space™ is a decentralized, self-organizing IPv6 native overlay built by RiV Chain™. It serves as the backbone of CupLink™ , enabling direct, resilient peer-to-peer communication across mesh networks, local environments, and even offline scenarios without relying on centralized servers.

V6Space Ltd.

Additional Information