I think some of them have a few carbs. I read on another forum that some flavors, such as caramel, have about 8 carbs per bottle. I have no reference to cite for that, however.

If I'm not mistaken, all of the flavors of the DaVinci syrups list 0 carbs per serving, but if you carefully examine the labels of the different flavors, you will see that the serving size varies. Some flavors have a serving size of 2 Tbsps, while others have a serving size of only 1 Tbsp. I believe the manufacturer is doing that so they can list them all as 0 carbs. I expect the labels of the Torani syrups are much the same as those of the DaVinci syrups.

If I use 1 Tbsp of the syrups that give that amount as the serving size, I count it as 0, but if I use more than 1 Tbsp, I count .5 carbs per Tbsp.