
Barrier
Input Director
ShareMouse
DisplayFusion
Ultramon
Actual Multiple Monitors
Dual Monitor Taskbar
Cross-platform software for sharing your mouse and keyboard between multiple computers

The modern platform for creating, sharing, and collaborating on AI prompts. Advanced version control and real-time testing.

Which is more popular?
Based on our record, Synergy seems to be more popular. It has been mentioned 284 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | symless.com | diffyn.com |
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| Company | 2001 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


Synergy is a software application developed by Symless. It is used for sharing a keyboard and mouse between multiple computers, and is useful in situations where several PCs are used together, with a monitor connected to each, but are to be controlled by one user. The user needs only one keyboard...
No description of Diffyn yet.
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
Synergy is recommended for IT professionals, developers, graphic designers, and other users who regularly work with multiple computers and need an efficient way to manage them all at once.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Review - Synergy by Symless - Multi Machine Network Control Software
More videos
The Ultimate Prompt Tool for Creators – Visualize & Organize with Diffyn
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Synergy and Diffyn.
Diffyn's answer:
Addresses workflow and change management on LLM prompts, provide teams with traceability and visualization of tests across multiple models, provide deeper understading into efficiency of these prompts.
Diffyn's answer:
Diffyn is the platform that specializes on both change management and multi-model analysis.
Diffyn's answer:
React, Next.js, POSTGRESQL
Diffyn's answer:
Professionals incorporating LLMs or AI tools in their workflow and wants to keep track of changes and test their prompts.
Diffyn's answer:
I started working on Diffyn when I notice that prompting has become an essential part of work across many industries. While there are version control platofrms like github, they are not designed for just prompt management are can be overkill such applications, it is also not integrated natively with various LLMs and relevant tools for users to validate ideas and visualise results properly.
Share your experience with using Synergy and Diffyn. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Synergy is yet another software that lets you work on separate computers with the same input devices. It helps you save all the clutter caused by the cables of a traditional KVM. What’s more, it works even when the...
We have no reviews of Diffyn yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


I did something similar last year with a monitor without built-in KVM but with good DCC support (Ultrasharp U3417W) and Synergy [0]. I use Synergy as part of my desk setup already, but needed a way to view the UI of a normally headless... - Source: Hacker News / 5 months ago
Just use Synergy, the OG "soft KVM": https://symless.com/synergy. - Source: Hacker News / almost 2 years ago
I continue to use Notepad++ despite having tried every other editor and IDE under the sun. This, of course, drives every person completely insane when I explain that my "IDE" is: - Notepad++ for editing, pretty much stock, no plugins -... - Source: Hacker News / almost 2 years ago
Tracking Diffyn since Jun 2025.
When comparing Synergy and Diffyn, you can also consider the following products.

Barrier is a cross-platform software for sharing your mouse and keyboard between multiple computers...
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Control multiple windows systems with one keyboard/mouse. Share a keyboard and mouse across multiple windows system.
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With its easy setup and high level of versatility, ShareMouse is a great tool if you're looking to use a single mouse and keyboard across multiple computers.
Compare ShareMouse to Synergy or Diffyn:

DisplayFusion will make your multi-monitor life much easier.
Compare DisplayFusion to Synergy or Diffyn:

UltraMon is a piece of software built to help with the management of multiple screens on the same computer system. Without software like this, taking full advantage of an expanded desktop space can be difficult.
Compare Ultramon to Synergy or Diffyn:

Actual Multiple Monitors is a software utility which offers the comprehensive solution to improve the functionality of Windows user interface for comfortable and effective work with multi-monitor configurations.
Compare Actual Multiple Monitors to Synergy or Diffyn: