This is a recurrent question in the support email, sometime ago I’ve added this question in the FAQ, but I’m just adding the answer here too for people looking in the community site.
Do I own the sprites/assets created with Aseprite? Can I use my sprites commercially?
The answer is: Yes, you can use your own creations in commercial products because you own the copyright of everything you create (it doesn’t matter if you have used Aseprite to create your sprites).
Do I have to give credit to Aseprite or the developer team?
No, you don’t have to. Anyway it would be nice to spread the word with your friends or colleagues that you have used Aseprite to draw the sprites