DefGuard looks like a great way for average folks and small business to get quickly and easily secure in their infrastructure! Sounds like you value creating something really quality and putting it out there, making it free and open (even Open Source!) along the way, and also like you really want to provide as much value as you can for folks in the security space.
It's probably way too different an aspect of security to compare, and the different licenses are likely a big problem, but the values you express with Defguard resonate with what we're doing with BrowserBox open-source^0, and I bet it's the dumbest question you will see on this thread and I'm sure it will seem like a tacky promo so I'm sorry, but would it be a terrible idea to integrate BrowserBox open-source into your swiss-army knife?