Michael, thanks for sharing.
There is an increasing number of startups claiming AI based gun detect. Anyvision, e.g., mentions it as one of their options. Ironyun, others who I do not immediately recall.
This is being driven by the general trend of deep learning models that categorize vast categories of objects, including guns, bikes, street signs, and many other categories (see ImageNet, 1000 sysnets / categories commonly detected).
As for this company, the co-founders previously ran a payments startup that raised $130 million before leaving the company.
The good news is that they have a general track record. The bad news is that neither has any special expertise in computer vision / machine learning that would give them an edge here.
According to a Fortune article on them, they are using a SaaS model and charging fairly significantly:
Security will be available in three tiers: Professional, Enterprise, and Unlimited Professional, with increasing feature sets. The price, paid per camera each month, ranges from $25 to $100, depending on the tier
As for the school in the article you cite, the video below explains that the co-founder's dad teaches there:
We might do an article on them if they get funding and/or start seeing some traction but, for now, they look like one of many fledgling AI startups without a clear technological advantage.