[randallsquared]

As I mentioned partially elsewhere, in the US, you'll typically find aspartame, then saccharin, then sucralose. Almost every restaurant has all three already on the table when you sit, in case you order coffee or tea. If one's missing, it's probably sucralose. If only one is available, it's probably aspartame.

You can buy all these and other varieties in most grocery stores, but due to the history of when soda use exploded here in the 1980s, and the debunking of the old saccharin studies not becoming widely known until well after that, virtually all soft drinks in the US use aspartame, and I'm not aware of any that are saccharin only.