My diet:
Comparison

Stevia vs Monk Fruit Extract vs Erythritol

The short answer
Stevia and monk fruit are plant extracts with no known health concerns at normal use. Erythritol bakes most like sugar but has a 2023 heart-health question mark, so use it in moderation.
Side by sideStevia (Steviol Glycosides)Monk Fruit Extract (Luo Han Guo)Erythritol
Safety score90/100 Generally safe92/100 Generally safe70/100 Use in moderation
Sweetness vs sugar200–300×150–250×0.7×
Calories000.2 per gram
Blood sugar impactNoneNoneNone
AftertasteBitter for someMild, fruityCooling
Gut toleranceGoodGoodBloating in large amounts
Health questionsNone majorNone major2023 heart study

Swapping one for the other

Stevia and monk fruit are so sweet they're sold in blends. For baking, a monk fruit and allulose blend replaces sugar cup for cup.

Common questions

Which is best for keto?

All three. For baking, allulose or monk fruit blends behave most like sugar.