There are different tools you can use to assist you in building backlinks. Here are some of the most popular:
AhrefsAhrefs is a comprehensive backlink analysis tool that provides detailed information on your backlinks.

SEMrush
SEMrush is an SEO tool that provides data to help you improve your website rankings.

Ubersuggest
Ubersuggest is an SEO tool that provides keyword research and backlink analysis services.

Moz
Moz is an SEO tool that provides website planning, keyword research, and backlink analysis services.

Majestic
Majestic is an SEO tool that specializes in backlink analysis.