Linkbuilding

I am the owner of BuzzRamp and I need to increase the domain authority of the website. I would like to conduct a fully white hat link building process in order to improve the domain authority and start to see some improvements in organic traffic. This mainly requires analysing some competitors websites and reaching out to the webmasters of those sites in order to persuade them to also link to us. If you have any other thoughts about SEO strategy I'd be happy to hear about it.