BASE is one of the best tools to manage your SEO backlinks.

I have bought other backlink tools here on AppSumo and othe sites; but they have all dissapeared. I can tell BASE is different. It's made by real SEO professionals (Four Dots agency).

I use their other tools (Reportz and Dibz), and the bottom line is that they work. Not perfect to be honest, but they get the job done and have reasonable prices.

I can recommectd all their apps for SEO and reporting purposes. They are solid.