Instead of testing getint.io with the On-Premise (Self-Hosted) version of the app, you can create a Cloud account of that app and perform tests with it. Experience with getint.io will be exactly the same, difference between On-Premise and Cloud is handled by getint.io in a background logic. So, e.g. if your destination app is Jira Server behind firewall to be synced with ServiceNow, for trial you can create a free Jira Cloud instance, test that cloud instance with ServiceNow by using our Jira Cloud app, and once you are done and happy with results, you can purchase getint.io On-Premise version. That way you can make sure you are satisfied with the product and your IT team do not need to open any firewall rules.