How to Build Your Own UltraVNC
Replace UltraVNC with a custom build. Powerful, easy to use and free remote PC access software
Build Difficulty: 5/5
Build a working replacement in a weekend with AI tools
Estimated Timeline
Based on 31 features at Weekend Project difficulty, expect about One weekend with AI-assisted development.
Recommended Tech Stack
Full-stack React framework with API routes and server components
PostgreSQL database, auth, and real-time subscriptions
Utility-first styling for rapid UI development
Key Features to Replicate
Top features across 8 categories. See all 31 features
Network(5 features)
Support for one site connected to internet while other is behind NAT router
Support for both sites behind NAT routers using Repeater
Network access via TCP protocol
Network access via UDP protocol available in some products
Separate application allowing both sites to make outgoing connections with Repeater crossing the data
Compatibility(4 features)
Embedded JavaViewer allows connection and file transfers from a web browser on any system supporting Java including Linux and Mac OS
Support for older Windows versions including XP, Vista, Server 2003, 2008 and Windows 95, 98, ME, NT4, 2000
Follows the Remote Frame Buffer protocol allowing cross-platform desktop sharing with other VNC flavors
Support for Windows 7, 8, 8.1, 10, 11 and multiple Windows Server versions including Server 2008 R2 through Server 2025
Core Functionality(4 features)
Control another PC remotely using your mouse and keyboard
Display the screen of another computer on your own screen via internet or network
Run on the computer sharing the desktop to enable remote access
Run on the computer that will access the shared desktop
Deployment(4 features)
Run as application cloning current session or RDP session
Ability to select between console or RDP session for connection
Run as a service for always-on access cloning console
Ability to bundle with other software under GPL restrictions or without restrictions for commercial products
Security(3 features)
Built-in AES 256-bit encryption for secure connections
Plugin-based encryption support with longer password or predefined key options
Password authentication with 8+ character support
Use Case(3 features)
Support for eLearning and classroom control scenarios
Quick access to customer computers for helpdesk support from anywhere in the world
Capability for remote demonstrations and presentations
Access(2 features)
Access remote computers using access codes instead of IP addresses
Access remote computers using IP addresses
Communication(1 features)
Built-in chat functionality for communication during remote sessions
Cost Calculator
Pricing data not available for UltraVNC. Check their website for current pricing.