H4 visa application

I am in H1B visa in USA. I am looking for applying for H4 visa for my spouse. Do I need to apply it through my company? Or can I apply for it personally bearing all the cost?

It is a simple process - you just need the following. A lawyer is not needed.

A copy of the H-1B worker`s approval notice (Form I-797)Marriage certificate or birth certificate showing the family relationship between the applicant and the H-1B workerA passport valid for at least six monthsA completed and signed Form DS-160One color, passport-style photograph