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UltraVNC

Open-source VNC suite for Windows with a repeater, single-click support tool and encryption plugins.

Open sourceRemote desktop software
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About UltraVNC

UltraVNC is a free, open-source VNC server and viewer for Windows that has been maintained for many years by a small volunteer team. Beyond basic screen sharing it includes file transfer, chat, multi-monitor handling, a mirror driver for faster capture, and optional encryption plugins. Two extras make it useful for support work: UltraVNC Repeater, which relays connections so neither side needs open ports, and UltraVNC Single Click (SC), a pre-configured executable you can hand to a user so they connect back to you with one click. It is licensed under GPL-3.0 and free for any use. The trade-offs are that it is Windows-only, setup involves more knobs than modern code-based tools, and there is no hosted service, account system or mobile app. It suits technicians and hobbyists who are comfortable configuring things and want a free tool they can fully control.

Best for: Technicians who want a free, configurable VNC toolkit for supporting Windows PCs.

Pros and cons

What works

  • Free and open-source
  • Repeater and Single Click help with support behind firewalls
  • File transfer and chat built in

Why people leave

  • Windows only
  • Many settings to understand before it's secure
  • No hosted service or mobile apps

Top UltraVNC alternatives

See all 5
  1. 1TightVNC logo
    TightVNC

    Simpler VNC for Windows if you don't need the repeater or SC tools.

    66.5
  2. 2TigerVNC logo
    TigerVNC

    Cross-platform VNC for mixed Windows, Linux and Mac environments.

    62.6
  3. 3RustDesk logo
    RustDesk

    Modern open-source support tool with built-in relays and mobile apps.

    59.6
  4. 4MeshCentral logo
    MeshCentral

    Free self-hosted portal that handles relay and many devices from the web.

    57.2
  5. 5HelpWire logo
    HelpWire

    Free hosted remote support with far less configuration.

    55.3

Why people left UltraVNC

In reviewers' own words, from reviews of the apps they moved to. These are their opinions, not ours.

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UltraVNC: common questions

Is UltraVNC free?

Yes. UltraVNC is free, open-source software.

Is UltraVNC open source?

Yes. The source code is on GitHub at ultravnc/UltraVNC.

What platforms does UltraVNC run on?

UltraVNC is available for Windows.

What are the best alternatives to UltraVNC?

The highest-ranked UltraVNC alternatives right now are TightVNC, TigerVNC and RustDesk. See the full ranked list for pricing, platforms and verified facts.

See all 5 UltraVNC alternatives