Written for Synergy 3 (v3.7.2) and Synergy 1 (v1.21.4), checked 4 October 2026.
Synergy 1 and Synergy 3 are both current and supported; Synergy 2 is discontinued. Each major version is a separate product with significant differences, and moving between them is a new purchase or upgrade rather than an update. For what each one does, see: Synergy features
Synergy 3
Synergy 3 was launched on May 31st 2023, and is our newest version. We completely rebuilt our GUI (graphical user interface) from the ground up in Synergy 3, and implemented a brand new auto-discovery feature. The previous version, Synergy 2, taught us many lessons about what our customers wanted (and did not want) from our product. We're very proud of how Synergy 3 turned out, and we hope you love it as much as we do! For the launch announcement, see: Official launch of Synergy 3
Synergy 1
Need Synergy 1? It's included with your Synergy 3 license. Contact us and we'll add a Synergy 1 license to your account: Contact support
Synergy 1 can be the better fit on an operating system Synergy 3 doesn't support. To compare, see: Operating system and hardware requirements
Synergy 1 is still supported and in active development. It was first introduced in 2001. We previously advertised an end of life for Synergy 1, but this has since changed; there is now no intention to end of life Synergy 1. We will continue supporting Synergy 1, developing new enhancements and bug fixes. For business, Synergy 1 is the one we recommend, and every Synergy Business license includes both Synergy 1 and Synergy 3.
Synergy 2
Your free Synergy 3 upgrade should already be on your account, with its serial key: Your account
If it isn't there, or you chose a refund and haven't received it, let us know and we'll sort it out: Contact support
Synergy 2 was discontinued and customers were either upgraded for free to Synergy 3 or refunded depending on their preference.