Yes, we do have a free trial plan. In fact, we encourage you to try them first, because we want you to be fully satisfied with our product before you actually buy it.
Zoho Invoice free plan comes with all the features that are available in the paid plans. When you are on a free plan, you will be able to send unlimited invoices and estimates. The only limitation would be the number of customers that you can add and the number of users accessing your account. Check out our pricing plans for more help.