Well, neither. It’s not “alot” but “allot.” Here’s an example of doing it wrong:
One word, allot, means to distribute something evenly in pieces, such as when a parent allots each child one piece of candy.
When you write about a bunch of something, you say that you have a lot of it. You could say there’s a lot of candy in the bowl.
There ain’t no such word as “alot.” Don’t use it.