How to manage multiple accounts across different social platforms?

I am trying to build my online presence among developer and entrepreneur community, such as here, dev.to, reddit and similar. All tools available out there so far are only compatible with Facebook, Twitter, LinkedIn, and Instagram.

Does anyone know if there are any online tools that allow you to manage your accounts from more specific websites rather just Fb and Pinterest?

Particularly, I wanted to be able to see all relevant new posts across these platforms as well as all replies and comments posted on these website without opening each website separately.

TIA