Question
Is it possible to give WHMCS a trial run before purchasing a license for it?
Answer
At this moment in time, WHMCS does not have any trial license program on its side. They do, however, have a 30-day money-back guarantee through their website that you may be able to purchase a license and request a refund.
You can also check out their pricing plans through their official website at: https://www.whmcs.com/pricing/