Which is best software for SEO audit?

There are many tools present for fixing and creating reports of your website's SEO optimization issues. It depends on you which tools you want to use, we can find paid and unpaid tools for SEO audit.

SEO Audit Tools like:-
Ahrefs
SEMrush
Ubbersuggest

These are very famous tools, but I want to suggest using screaming frog SEO spider tools, this tool deeply analyzed your website SEO optimization issue. SO you should use it.