It depends on the application. Sometimes you can use the alternatives to the staple guns, sometimes not.
That’s why it’s a good idea to buy a staple gun.
When dealing with wood, you can use different nail guns as an alternative to the staple guns based on the applications.
A framing nailer comes in handy for large woodworks. Whereas, a finishing nail gun is useful for lightweight projects.
Some other popular forms of nail guns are - brad nail gun, pin nail gun, palm nail gun, flooring nail gun, roofing nail gun, etc.