Is mikrotik hAP ac² Router-AP appropriate for small business - alternatives ?

Hi all. We currently rent some space for a new startup business and there are some UTP sockets on the walls. You just plug the cable and you get internet access. The thing is that we plan to increase the security and and also create a local WiFi network. The main idea is to buy a mikrotik hAP ac² and then plug on it a switch to share the internet connection through wires. Also we can create a WiFi. In this case I suppose that we can use the features of the mikrotik to setup a firewall, make the devices use specific DNS and stuff like that. In other words to secure a little bit our network.

The reason I'm asking is that I understood that mikrotik runs on proprietary software and I was wondering if there is any other better solution or similar solutions that we can use that runs on open source.

Any ideas or comments are welcome.