#74 in Collaboration & CommunicationUpdated 2026-08

UltraVNC

by UltraVNC · Free GPL VNC remote desktop and support tool for Windows

BenchRank score

29.4

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Overview

UltraVNC displays the screen of another computer over a network or the internet and lets you control it with your own mouse and keyboard. A VNC server runs on the shared machine and a viewer runs on the connecting machine, using the RFB protocol. The project also ships UltraVNC SC for single-click support sessions, a Repeater for NAT-to-NAT links, chat and file transfer.

Best for: IT and help-desk staff who need free remote control of Windows PCs, including commercial use.
Pricing: Free for all uses, including commercial, and distributed under the GNU General Public License; no paid plans are shown.
Runs on: WebWindows

Strengths and trade-offs

Strengths

Free for all uses, including commercial, under the GPL
Chat and file transfer included alongside remote control
Talks to other VNC flavours via the RFB protocol
Can run as a Windows service or as a plain application

Trade-offs

Server runs on Windows only; other systems connect via the Java viewer
Encryption is a plugin add-on rather than built into UltraVNC
Passwords capped at 8 characters unless the encryption plugin is used
NAT-to-NAT connections need a separate Repeater application

Pricing

Published plans and prices from UltraVNC’s own pricing page.

How this score is made up

Each dimension is scored out of 100 and combined into the headline score using fixed weights.

MCP support
Whether an agent can drive the product through the Model Context Protocol, and how much setup that takes.
Documentation
Publicly reachable docs — coverage, freshness, code samples and machine readability.
Agent friendliness
How readable the site is to an automated client: llms.txt, structured data, server-rendered content, crawler access.
Customer sentiment
Third-party ratings, shrunk toward the catalogue mean by review volume and corroborated across independent sources.
Changelog
A public, dated record of what shipped and when — the clearest signal that a product is still alive.
Marketing site structure
Whether the site answers a buyer's questions: clear positioning, the pages that matter, and accessibility.
Page speed
How fast the site loads for real visitors: Chrome UX Report 75th-percentile LCP, INP and CLS, with a Lighthouse mobile run standing in where a site has too little traffic for field data.
Operational trust
Status page and incident history, security disclosure, compliance and data-processing documentation.

Measured, but not part of the score

Useful to know, but not a mark for or against the product — so these do not affect the ranking.

Openness
Source availability, self-hosting, data export and open standards. Scored and shown, but not part of the composite — paid SaaS is not worse for being paid SaaS.
Maintenance
Release cadence and repository activity. Scored and shown, but not part of the composite — it is only measurable for open repositories.

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Where this comes from

The UltraVNC pages BenchRank reads when it scores the product — its documentation, release notes, status and security pages, and its repository where there is one.

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