So if you use Plate Recognizer or OpenALPR, you will get similar results and will be available on a website for 5-7 days and then it is gone. That may fit your needs or it may not.
Any retaining of information any longer would require a local way to pull that information as people have done here with what was shown in Post #5. The problem with that method as you read through that thread is occasionally something changes and then if you are not watching it constantly, you will be missing data from whenever that change occurred. If you want something that is turn it on and forget about it, that method will not be it.
Plate Recognizer is integrated with
Blue Iris and would be more of a turn it on and forget about it, and you would retain the plates in the BI log. They have a free demo that you can do right in Blue Iris and see if it fits your needs before deciding to go with a monthly plan. I highly recommend opening up the camera settings in BI for that camera and select Artificial Intelligence and select Plate Recognizer and let it do its thing for a couple of days and see if that accomplishes what you are trying to do. You can also view the captures for 7 days on their website.
With that said, if I had a camera that had the capabilities built in, I would not go to a monthly subscription plan and would pull it from the camera or write code to pull it into another format. But as a business, you may not care about paying for a 3rd party monthly prescription, but then you are under-utilizing the capabilities of that camera.