Consider that as a ranking signal Shekar and it will give a extra push only if it is from a site related to your domain. Honestly, there is not point in paid backlinks that are non-contextual to your niche.
As far as organic backlinks, try HARO. One tool that actually works well for getting links from really good sites.
And one more get the list of sites that have listicle format. For example, if site A had 14 best tool to customer support, reach them with your content of your tool. You would be surprised by the amount of listicles available just thru a google operator aided search.
Both of this technique proved to be relly effective.