One keyboard multiple PCs: control desktops without a KVM

Mouse Without Borders is a lightweight Windows option that’s simple to set up. It isn’t actively updated, but it still works for basic needs and clipboard sharing.

Synergy and DeskFlow are two long‑standing contenders with a shared history: Synergy started as an open‑source project and later became a commercial product, while DeskFlow grew from open‑source forks. Both run on Windows, macOS, and Linux, and let you designate one PC as the server and others as clients. They use a grid interface to decide how the cursor crosses between screens.

Synergy’s prices vary by the number of computers you control: $15 for three, $19 for five, and $29 for 15. DeskFlow and Barrier are positioned as cross‑platform options with different licensing models, while Multiplicity from Stardock is another Windows‑focused choice that can add features like turning a second PC into a monitor or enabling KVM‑like switching in its Pro tier.

If you routinely juggle multiple machines, software bridges can save desk space and cut the time you spend switching between keyboards. You may keep a dashboard on one screen while typing on another, and you can copy text between machines. The trade‑off is that you rely on network stability and may encounter quirks when mixing different operating systems. On a busy or public network, latency can creep in and break the smooth feel you expect from a hardware KVM.

1) Decide your goal: is single‑cursor control enough, or do you also want clipboard and file transfer across devices? 2) Check which OS you need to support and how many computers you want to manage. 3) If you choose a paid option, pick a plan that fits your devices and look for any enterprise features if you’re coordinating a team. 4) Start with a private home network test to gauge responsiveness before relying on it for work tasks.