Every Raiseaticket portal includes 5 agent seats at no cost, and each of those agents gets the complete core helpdesk from day one:
If your team grows beyond 5 agents, you can purchase additional agent packs at any time. A pack raises both the agent limit and the monthly ticket allowance.
A small number of capabilities sit outside the free plan as premium add-ons: single sign-on, advanced automation, asset management, change management, the REST API, a custom domain, and sending replies from your own Office 365 or Google Workspace mailbox. Everything listed above is free regardless of how many agent packs you hold - what you pay for is capacity, not capability.