I like the Westbrae Un-Ketchup (no sweeteners, very tomato-ey), available at Health Food Stores.

I also like the Keto Ketchup, but it's quite sweet to me. Lots of people like it very much just that way (sweetened with only sucralose).

I believe the Estee is sweetened with fructose, as are most of their products.

I'm not sure about the Walden Farms sweetener and haven't had a chance to try it yet.

I prefer a sugarless chunky mild salsa over almost all the ketchups