If you're reading any sugar free BBQ sauce recipes that have either ketchup or Worcestershire sauce in them then they're not sugar free.
Any BBQ sauce whether home made or off the supermarket shelf has to have some form of sweetness to it so the challenge is to make a sweet BBQ sauce recipes that doesn't have any added sugar.
This recipe uses artificial sweeteners by complementing the ingredients with a soft drink so not only is it sweet but it's also really quick to make.
If however you're looking for something that is a little more in depth from a culinary perspective then I do have a alternative
sugar free barbecue sauce
recipe for you.