Aspartame is keto-friendly, but better sugar-alternatives are available.
Xylitol is keto-friendly and doesn't count towards daily carb limits.
Truvia is keto because it combines two other keto-friendly sweeteners.
For most people, sucralose is keto-friendly in moderation.
Stevia is a keto-friendly sweetener, and it's very popular.
Pure Via Stevia is keto-friendly.
Polyglycitol syrup is just a blend of other non-keto sweeteners, so it is also not keto friendly.
SucraDrops are a brand of sucralose, which is keto-friendly in moderation.