Qase provides a free 14 days trial for the Startup and Business subscriptions. To create a new account with trial access, simply navigate to the pricing page, choose the subscription you want to try, and hit "Start free trial":
If you have already been using a free account but haven't yet enabled a trial before, you can do so from your account's Billing tab (you need to be the account Owner for that). If you’re the account owner, here’s a direct link to the billing section where you can start the free trial by clicking the "Upgrade" button and choosing the subscription plan you'd like to trial.