What are the other options other thank Linkedin to hire workforce in US, a cost effective (zero cost) method?

You can use angelist

Thank you

There are US specific slack groups. You can be a part of those free of cost and find candidates.

Thank you Wristy, for being helpful always.

You can try indeed, ladder, simplyhired, handshake boolean search for angellist, linkedIn,

@Wristy Can you please guide me how to connect with such "US specific Slack group" ?? It would be a help for me and my team member.

Peoplegeeks, lattice, ht mavericks are some slack communities join them you will find many hrs from USA, you can connect in knowing groups, communities