Synergy is a popular keyboard and mouse sharing tool that allows users to control multiple computers with one set of peripherals, regardless of operating system. It’s a favorite among developers, system administrators, and power users working with multi-device setups. But as of 2025, many users are seeking a Synergy alternative due to its outdated interface, premium pricing model, and occasional connectivity issues.
The need for seamless multi-device control is more relevant than ever. According to a 2024 productivity tools survey, over 38% of remote professionals now use two or more computers simultaneously, often combining Windows, macOS, and Linux. This has created rising demand for Synergy competitors that are faster, easier to configure, or free.
Whether you’re managing a workstation, a streaming setup, or a creative workflow, here are the top 10 Synergy alternatives and competitors in 2025, offering more control, customization, and convenience across devices.
1. Barrier
Barrier is a free, open-source fork of Synergy that offers nearly identical functionality—allowing users to share a mouse and keyboard between multiple computers. It’s maintained by the open-source community and supports Windows, macOS, and Linux.
- Best for: Users looking for a free Synergy replacement
- Notable feature: No subscription, open-source, cross-platform compatibility
2. Mouse Without Borders
Developed by Microsoft Garage, this free tool lets users control up to four Windows PCs with one keyboard and mouse. It also supports clipboard sharing and file transfer.
- Best for: Windows-only environments
- Notable feature: Easy setup and built-in security via encryption
3. Input Director
Input Director is a Windows-exclusive alternative that allows you to control multiple networked computers with a single keyboard and mouse. It supports shared clipboards and screen edge transitions.
- Best for: Multi-Windows setups in office or home labs
- Notable feature: Custom macros and multi-monitor awareness
4. ShareMouse
ShareMouse offers an intuitive drag-and-drop interface and supports both Windows and macOS. It’s ideal for users who want simple setup without compromising functionality.
- Best for: Mixed Windows/macOS users
- Notable feature: Seamless drag-and-drop file transfer and password protection
5. Multiplicity by Stardock
Multiplicity focuses on enterprise-grade keyboard/mouse sharing with features like remote access, encrypted connections, and multi-PC audio sharing.
- Best for: Power users and teams with enterprise security needs
- Notable feature: Seamless input and audio control across multiple PCs
6. Teleport (Mac Only)
Teleport allows users to share a single keyboard and mouse between multiple Macs over a local network. Though no longer under active development, it’s still popular among macOS users.
- Best for: Mac-only setups
- Notable feature: Secure drag-and-drop file sharing between Macs
7. Across
Across is a cross-platform software KVM (keyboard, video, mouse) switch that works on Windows and macOS. It offers Bluetooth-based sharing, making it ideal for laptops and tablets.
- Best for: Wireless and Bluetooth-based switching
- Notable feature: Connect multiple devices wirelessly with one keyboard and mouse
8. MouseMux
MouseMux is an experimental tool that allows two users to share a keyboard and mouse with separate cursors on the same PC or multiple connected systems.
- Best for: Developers and collaborators
- Notable feature: Dual-cursor support and multi-user functionality
9. Logitech Flow
Available with Logitech mice and keyboards, Flow allows users to move between up to three computers using Logitech’s hardware and software integration.
- Best for: Logitech peripheral users
- Notable feature: Smart switching and auto-detection across devices
10. Input Leap
A newer open-source Synergy alternative, Input Leap continues development from Barrier with performance and security enhancements. It supports cross-platform device sharing.
- Best for: Developers and open-source users
- Notable feature: Active community support and Linux-focused enhancements
Choosing the Best Synergy Alternative in 2025
While Synergy remains a powerful tool for multi-device control, the landscape in 2025 offers a range of flexible, secure, and often free alternatives. Whether you need lightweight LAN connectivity, enterprise-grade encryption, or Bluetooth device switching, the options above deliver solutions that fit your tech setup and workflow.
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