There is a one-off cost for the software which includes your first year of Maintenance. After that first year it is up to you whether or not you want to continue paying for Maintenance. The annual maintenance cost is a lot less than the initial software cost.
The advantage of Maintenance is you get access to SolarWinds support and all minor AND major software updates during the life of your Maintenance agreement, If you choose not to renew it, you're stuck with your last version and no support. On saying that, you always have us here on thwack to help you instead of SolarWinds support; but there's only so much we can do!
Thank you ... We are still currently in the process of the experience of SolarWinds SAM , and if we need any technical assistance we will ask questions in thwak
Accept my thanks and gratitude