As far as I know, they make their own entirely.
There are connexions with other knife firms, allegedly.
The range is continually expanding from month to month and this is very promising.
The ones I have ( 5 knives from 2007 until this month) have ALL been exceptionally well-made both carbon & stainless.Some peerless jigging & scales available for the price. No gaps,blade play or weak springs here on my models unlike Schatt& Morgans I have which cost as much or more.
One legitimate criticism could be that they make rather large knives (though the Barlow & 3.75" Scout are sturdy but not bulky)but this may change as they seem to be an expanding company. They appear to have very good dealers as well.
Check through their range, identify one you like and buy it, I very much doubt if you will be disappointed.