Yes, both Balsamiq and Jira Service Desk offer a Free Trial.
Balsamiq is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Jira Service Desk is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Balsamiq Starts at $9/Month whereas for Jira Service Desk Starts at $10One-Time Payment.
Some top alternatives to Balsamiq includes Miro, InVision, Pidoco, NinjaMock, Moqups, Axure RP, Wireframe.cc, Claritee, Stage and Zen Wireframe.
Some top alternatives to Jira Service Desk includes Freshservice, ManageEngine ServiceDesk Plus, SolarWinds Service Desk, Mint Service Desk, Symantec ServiceDesk, Freshdesk, HelpDesk, ReadyDesk, Milldesk, HESK, Scopedesk and GLPI.