We did look into other solutions. However, we did not find anything that compared to this solution. 

I have worked with MikroTik and Ubiquiti Networks EdgeRouter.

I am currently evaluating and searching for open-source enterprise firewalls and doing a comparison of the features between all of them. I am assessing the pros and cons of vendors. 

I am looking for something that will give me a report on the comparison of features, capabilities, the different vendors, and the different open-source solutions that are available.

I am also doing a comparison on Palo Alto, Cisco Firepower, and Fortinet Fortigate.

We had to evaluate other solutions because our primary solution was Juniper SRX, but we were not happy with the features. So we had no other choice and we were forced to look for something else. We use the Sophos XG firewall because we can configure it directly from Azure. 

We found the OPNsense solution interesting because there are no costs. In Azure, you only pay for the virtual machine. 

I'm aware of Fortinet as well. 

It depends on price versus performance. If you're willing to pay, Fortinet's great. If you don't have the budget, OPNsense is more affordable.

We evaluated other products for defense similar to OPNsense. We weren't happy with the whole difference. We were happy with the company behind OPNsense. 

We will pay for OPNsense if required, but that is the main reason we chose it.