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Licensing cost is per license... A pre-formatted analysis graph would be great
For the latest information on pricing, visit https://www.red-gate.com/dynamic/purchase/product/sqlmonitor
All prices are per server and include one year’s support and upgrades. For clusters, each node requires a license. Virtual machines also require a license. You don't need to buy extra licenses for multiple SQL Server instances on a server.
The following is a quick overview of editions offered by other software in similar categories