BlackHatWorld - It is more of a money-oriented site. There are a lot of great threads about Digital Marketing, money making methods, business etc.
Indie Hackers - Great community, a lot of great discussions about various topics. In 2017 the site was bought by Stripe.
Hack Forums - It is like the bad version of BlackHatWorld and Indie Hackers, lot of scammers and sellers, but still, you can find something great in it.
i don’t think there’s any better sites than onehack. this is the best site for any contents we want for education. love this site. don;t need no alternatives. i wonder if onehack has discord or telegram group tho.
It would be great to have a discord group of https://onehack.us/. For example if this site goes down we can be on discord and get news about the return of the site.
I agree 1hack is great but in my case i’m always looking for new sites to learn more.