When ServiceNow SPM is the right answer
This page is written by TransformRadar, so start with the cases where the honest recommendation is the other product.
If your organisation already runs ServiceNow as its system of record for IT — ITSM, CMDB, HR service delivery — then SPM sits on data you already maintain, and that adjacency is genuinely valuable. If your requirement is IT demand and portfolio management tied to the service catalogue, resource capacity planning at FTE level, or line-item budget management and earned value, ServiceNow is built for that and TransformRadar is deliberately not.
If you need a platform your own developers extend with custom applications, that is what the Now Platform is for. TransformRadar is a product, not a platform.